/* ================================================================
         * DESIGN TOKENS
         * ================================================================ */
        @font-face {
            font-family: "JetBrains Mono";
            font-style: normal;
            font-weight: 400 700;
            font-display: swap;
            src: url("/static/fonts/jetbrains-mono-latin-variable.woff2") format("woff2-variations");
            unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308,
                U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
        }

        :root {
            --paper: #fafaf7;
            --paper-2: #f2f1eb;
            --paper-3: #e7e5dd;
            --paper-tint: #f6f4ee;
            --ink: #0e0e10;
            --ink-2: #2a2a2e;
            --ink-3: #6b6b70;
            --ink-4: #737378;
            --ink-line: #1a1a1d;
            --seal: #e63a1f;
            --seal-2: #c42e16;
            --seal-tint: #fbe9e4;
            --ok: #1f6f43;
            --ok-tint: #e4efe7;
            --warn: #8a5a00;
            --warn-tint: #f5ecd7;
            --danger: #b5341e;
            --danger-tint: #f7e7e3;
            --border: #dcdad2;
            --border-strong: #0e0e10;
            --border-soft: #e7e5dd;
            --shadow-1: 0 1px 3px rgba(14, 14, 16, 0.06);
            --shadow-2: 0 1px 2px rgba(14, 14, 16, 0.06), 0 0 0 1px #dcdad2;
            --shadow-3: 0 8px 24px -8px rgba(14, 14, 16, 0.18), 0 0 0 1px #dcdad2;
            --shadow-focus: 0 0 0 3px rgba(230, 58, 31, 0.18);
            --r-1: 4px;
            --r-2: 8px;
            --r-3: 12px;
            --r-4: 18px;
            --s-1: 4px;
            --s-2: 8px;
            --s-3: 12px;
            --s-4: 16px;
            --s-5: 24px;
            --s-6: 32px;
            --s-7: 48px;
            --s-8: 64px;
            --s-9: 96px;
            --font-sans:
                "Pretendard Variable", Pretendard, -apple-system, "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
            --font-display:
                "Pretendard Variable", Pretendard, -apple-system, "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
            --font-mono: "JetBrains Mono", ui-monospace, "Cascadia Code", "Fira Code", monospace;
            --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
            --t-fast: 120ms;
            --t-base: 180ms;
            --t-slow: 280ms;
        }

        @media (prefers-color-scheme: dark) {
            :root {
                --paper: #111113;
                --paper-2: #18181c;
                --paper-3: #222228;
                --paper-tint: #18181c;
                --ink: #f0ede5;
                --ink-2: #c4c2ba;
                --ink-3: #7a7a84;
                --ink-4: #7b7b85;
                --ink-line: #e8e5dd;
                --seal: #e63a1f;
                --seal-2: #ff5c3e;
                --seal-tint: rgba(230, 58, 31, 0.18);
                --ok: #2eaa64;
                --ok-tint: rgba(46, 170, 100, 0.14);
                --warn: #c48a2a;
                --warn-tint: rgba(196, 138, 42, 0.14);
                --danger: #e05040;
                --danger-tint: rgba(224, 80, 64, 0.14);
                --border: #2c2c34;
                --border-strong: #f0ede5;
                --border-soft: #222228;
                --shadow-1: 0 1px 4px rgba(0, 0, 0, 0.3);
                --shadow-2: 0 2px 8px rgba(0, 0, 0, 0.5), 0 0 0 1px #2c2c34;
                --shadow-3: 0 8px 32px rgba(0, 0, 0, 0.6), 0 0 0 1px #2c2c34;
                --shadow-focus: 0 0 0 3px rgba(230, 58, 31, 0.28);
            }
        }

        /* ================================================================
         * RESET
         * ================================================================ */
        *,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            overflow-x: hidden;
        }

        body {
            font-family: var(--font-sans);
            background: var(--paper);
            color: var(--ink);
            line-height: 1.6;
            overflow-x: hidden;
            max-width: 100vw;
        }

        /* ================================================================
         * SKIP LINK
         * ================================================================ */
        .skip-link {
            position: absolute;
            top: -48px;
            left: 12px;
            z-index: 2000;
            background: var(--ink);
            color: var(--paper);
            padding: 10px 16px;
            border-radius: var(--r-2);
            font-size: 0.875rem;
            font-weight: 600;
            transition: top var(--t-fast) var(--ease);
        }

        .skip-link:focus {
            top: 12px;
        }

        /* ================================================================
         * NAV
         * ================================================================ */
        .navbar {
            position: sticky;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 0 24px;
            height: 56px;
            display: flex;
            align-items: center;
            background: var(--paper);
            border-bottom: 1px solid var(--border);
            transition: background var(--t-base) var(--ease);
        }

        .nav-inner {
            max-width: 1080px;
            width: 100%;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-family: var(--font-display);
            font-size: 1.25rem;
            font-weight: 800;
            letter-spacing: -0.04em;
            text-decoration: none;
            color: var(--ink);
        }

        .logo .dot {
            color: var(--seal);
        }

        .nav-links {
            display: flex;
            gap: 28px;
            align-items: center;
        }

        .nav-link {
            color: var(--ink-3);
            text-decoration: none;
            font-size: 0.875rem;
            font-weight: 500;
            transition: color var(--t-base) var(--ease);
        }

        .nav-link:hover {
            color: var(--ink);
        }

        @media (max-width: 768px) {
            .nav-links {
                gap: 20px;
            }

            .nav-link {
                font-size: 0.82rem;
            }
        }

        /* ================================================================
         * HERO
         * ================================================================ */
        .hero {
            min-height: calc(100vh - 56px);
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 80px 24px 72px;
        }

        .hero-content {
            max-width: 720px;
            width: 100%;
            min-width: 0;
            text-align: center;
        }

        .hero-brand {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 28px;
            margin-bottom: 24px;
            animation: fadeUp 0.5s var(--ease) both;
        }

        .hero-stamp {
            width: 96px;
            height: 96px;
            flex-shrink: 0;
            border: 4px solid var(--ink);
            border-radius: 6px;
            background: var(--paper);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 4px;
            box-shadow: var(--shadow-1);
        }

        .hero-stamp-word {
            font-family: var(--font-display);
            font-weight: 800;
            font-size: 1.5rem;
            letter-spacing: -0.05em;
            line-height: 1;
            color: var(--ink);
        }

        .hero-stamp-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--seal);
        }

        .hero-wordmark-block {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .hero-wordmark {
            font-family: var(--font-display);
            font-weight: 800;
            font-size: clamp(2.2rem, 7vw, 3.5rem);
            line-height: 1;
            letter-spacing: -0.03em;
            color: var(--ink);
        }

        .hero-wordmark .dot {
            color: var(--seal);
        }

        .hero-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 0.72rem;
            font-weight: 700;
            color: var(--ink-3);
            letter-spacing: 0.1em;
            text-transform: uppercase;
            margin-bottom: 28px;
        }

        .hero-eyebrow::before {
            content: "";
            display: inline-block;
            width: 20px;
            height: 1px;
            background: var(--ink-3);
            flex-shrink: 0;
        }

        .hero-h1 {
            font-family: var(--font-display);
            font-size: clamp(2.4rem, 6vw, 3.5rem);
            font-weight: 800;
            letter-spacing: -0.03em;
            line-height: 1.04;
            margin-bottom: 20px;
            color: var(--ink);
            animation: fadeUp 0.5s var(--ease) both;
        }

        .hero-h1 .seal-dot {
            color: var(--seal);
        }

        .seal-dot {
            color: var(--seal);
        }

        /* hero_title span classes from Jinja2 page context */
        .hero-h1 .grad {
            font-style: italic;
        }

        .hero-h1 .grad2 {
            color: var(--seal);
        }

        .hero-desc {
            font-size: 1.0625rem;
            color: var(--ink-2);
            line-height: 1.75;
            margin-bottom: 48px;
            animation: heroDescReveal 0.5s 0.08s var(--ease) both;
        }
        @keyframes heroDescReveal {
            from { transform: translateY(12px); }
            to { transform: translateY(0); }
        }

        /* ================================================================
         * FORM CARD
         * ================================================================ */
        .form-card {
            background: var(--paper);
            border: 1px solid var(--border);
            border-top: 2px solid var(--seal);
            border-radius: var(--r-3);
            padding: 28px;
            box-shadow: var(--shadow-2);
            animation: fadeUp 0.5s 0.16s var(--ease) both;
            text-align: left;
            transition: box-shadow var(--t-base) var(--ease);
        }

        .form-card:hover {
            box-shadow: var(--shadow-3);
        }

        .form-card.qr-focus {
            border-color: var(--ink);
            box-shadow: var(--shadow-3);
        }

        .focus-banner {
            display: none;
            margin-bottom: 14px;
            padding: 12px 14px;
            border: 1px solid var(--ink);
            border-radius: var(--r-2);
            background: var(--paper-2);
            color: var(--ink);
            font-size: 0.875rem;
            line-height: 1.6;
        }

        .focus-banner.qr {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .focus-banner strong {
            font-family: var(--font-display);
            font-weight: 700;
        }

        .focus-banner-code {
            font-family: var(--font-mono);
            font-size: 0.75rem;
            color: var(--ink-3);
            text-transform: uppercase;
            letter-spacing: 0.06em;
            white-space: nowrap;
        }

        .input-wrapper {
            position: relative;
            margin-bottom: 12px;
            display: flex;
            gap: 8px;
            align-items: center;
        }

        .url-field {
            display: flex;
            flex-direction: column;
            gap: 6px;
            flex: 1;
            min-width: 0;
        }

        .url-field-label {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            min-height: 16px;
            font-size: 10px;
            font-weight: 700;
            letter-spacing: 0.1em;
            text-transform: uppercase;
            color: var(--ink-3);
            margin-bottom: 6px;
        }

        .url-label-left {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .url-field-label span:last-child {
            color: var(--danger);
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0;
            text-transform: none;
            opacity: 0;
            transition: opacity var(--t-fast) var(--ease);
        }

        .url-field.is-error .url-field-label span:last-child {
            opacity: 1;
        }

        .url-input-shell {
            display: flex;
            align-items: center;
            border: 1px solid var(--ink);
            background: var(--paper);
            border-radius: var(--r-2);
            padding: 0 6px 0 14px;
            height: 52px;
            flex: 1;
            min-width: 0;
            transition: box-shadow var(--t-base) var(--ease);
        }

        .url-input-shell:focus-within {
            box-shadow: var(--shadow-focus);
        }

        .url-field.is-error .url-input-shell {
            border-color: var(--danger);
            box-shadow: 0 0 0 3px rgba(181, 52, 30, 0.15);
        }

        .url-input-icon {
            display: flex;
            align-items: center;
            color: var(--ink-3);
            flex-shrink: 0;
            margin-right: 10px;
        }

        .url-input-icon svg {
            width: 16px;
            height: 16px;
        }

        .form-input {
            flex: 1;
            min-width: 0;
            padding: 0;
            height: 100%;
            background: transparent;
            border: 0;
            border-radius: 0;
            color: var(--ink);
            font-size: 0.9375rem;
            font-family: var(--font-mono);
            outline: none;
            transition: none;
        }

        .form-input::placeholder {
            color: var(--ink-4);
            font-family: var(--font-mono);
            font-size: 0.875rem;
        }

        .submit-inline {
            height: 52px;
            padding: 0 24px;
            background: var(--ink);
            border: none;
            border-radius: var(--r-2);
            color: var(--paper);
            font-size: 0.9375rem;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 7px;
            transition:
                background var(--t-fast) var(--ease),
                transform var(--t-fast) var(--ease),
                opacity var(--t-base) var(--ease);
            flex-shrink: 0;
            white-space: nowrap;
        }

        .submit-inline:hover {
            background: var(--ink-line);
        }

        .submit-inline:disabled {
            opacity: 0.5;
            cursor: not-allowed;
        }

        /* toggle */
        .toggle-row {
            display: flex;
            gap: 8px;
            margin-bottom: 14px;
        }

        .toggle-radio {
            opacity: 0;
            position: absolute;
            width: 0;
            height: 0;
            pointer-events: none;
        }

        .toggle-label {
            flex: 1;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 7px;
            padding: 10px 12px;
            border: 1px solid var(--border);
            border-radius: var(--r-2);
            cursor: pointer;
            color: var(--ink-3);
            font-size: 0.875rem;
            font-weight: 500;
            transition: all var(--t-base) var(--ease);
            background: var(--paper-2);
            user-select: none;
        }

        .toggle-label svg {
            width: 16px;
            height: 16px;
            flex-shrink: 0;
        }

        .toggle-radio:checked+.toggle-label {
            border-color: var(--ink);
            background: var(--ink);
            color: var(--paper);
        }

        #privateLink:checked+.toggle-label {
            border-color: var(--seal);
            background: var(--seal-tint);
            color: var(--seal-2);
        }

        #privateLink:checked+.toggle-label svg {
            color: var(--seal);
        }

        .toggle-radio:focus-visible+.toggle-label {
            box-shadow: var(--shadow-focus);
        }

        .desc-row {
            min-height: 32px;
            position: relative;
            margin-bottom: 14px;
        }

        .desc-item {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            opacity: 0;
            transform: translateY(6px);
            transition:
                opacity var(--t-base) var(--ease),
                transform var(--t-base) var(--ease);
            font-size: 0.8125rem;
            color: var(--ink-3);
        }

        .desc-item.active {
            opacity: 1;
            transform: translateY(0);
        }

        .custom-wrap {
            overflow: hidden;
            max-height: 72px;
            opacity: 1;
            transition:
                max-height 0.3s var(--ease),
                opacity var(--t-base) var(--ease),
                margin 0.3s var(--ease);
            margin-bottom: 14px;
        }

        .custom-wrap.hide {
            max-height: 0;
            opacity: 0;
            margin-bottom: 0;
        }

        .custom-input-row {
            display: flex;
            align-items: center;
            background: var(--paper-2);
            border: 1px solid var(--border);
            border-radius: var(--r-2);
            overflow: hidden;
        }

        .custom-prefix {
            padding: 0 10px 0 14px;
            font-family: var(--font-mono);
            font-size: 0.8125rem;
            color: var(--ink-2);
            white-space: nowrap;
            height: 52px;
            display: flex;
            align-items: center;
            border-right: 1px solid var(--border);
            background: var(--paper-3);
            flex-shrink: 0;
        }

        .custom-input {
            flex: 1;
            min-width: 0;
            padding: 0 14px;
            height: 52px;
            background: transparent;
            border: none;
            color: var(--ink);
            font-size: 0.9rem;
            font-family: var(--font-mono);
            outline: none;
        }

        .custom-input::placeholder {
            color: var(--ink-4);
            font-family: var(--font-sans);
        }

        .custom-input-row:focus-within {
            border-color: var(--ink);
            box-shadow: var(--shadow-focus);
        }

        .submit-full {
            display: none;
            width: 100%;
            padding: 0 16px;
            height: 52px;
            background: var(--ink);
            border: none;
            border-radius: var(--r-2);
            color: var(--paper);
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition:
                background var(--t-fast) var(--ease),
                transform var(--t-fast) var(--ease),
                opacity var(--t-base) var(--ease);
            align-items: center;
            justify-content: center;
            gap: 8px;
            position: relative;
            overflow: hidden;
            margin-top: 6px;
        }

        .submit-full:hover {
            background: var(--ink-line);
        }

        .submit-full:disabled {
            opacity: 0.5;
            cursor: not-allowed;
        }

        .btn-loader-cnt {
            position: absolute;
            opacity: 0;
            display: flex;
            align-items: center;
        }

        .spinner {
            width: 18px;
            height: 18px;
            border: 2px solid rgba(250, 250, 247, 0.3);
            border-top-color: var(--paper);
            border-radius: 50%;
            animation: spin 0.8s linear infinite;
        }

        @keyframes spin {
            to {
                transform: rotate(360deg);
            }
        }

        .loading .btn-label {
            opacity: 0;
        }

        .loading .btn-loader-cnt {
            opacity: 1;
        }

        .err-box {
            padding: 12px 16px;
            background: var(--danger-tint);
            border: 1px solid rgba(181, 52, 30, 0.18);
            border-left: 3px solid var(--danger);
            border-radius: var(--r-2);
            color: var(--danger);
            font-size: 0.875rem;
            margin-bottom: 16px;
            display: none;
            animation: fadeUp 0.3s var(--ease);
        }

        .err-box.warn {
            background: var(--warn-tint);
            border-color: rgba(138, 90, 0, 0.18);
            border-left-color: var(--warn);
            color: var(--warn);
        }

        .err-box.success {
            background: var(--ok-tint);
            border-color: rgba(31, 111, 67, 0.18);
            border-left-color: var(--ok);
            color: var(--ok);
        }

        .err-box.show {
            display: block;
        }

        /* ================================================================
         * RESULT CARD
         * ================================================================ */
        .result-card {
            background: var(--paper);
            border: 1px solid var(--border);
            border-radius: var(--r-3);
            margin-top: 20px;
            display: none;
            animation: fadeUp var(--t-slow) var(--ease);
            box-shadow: var(--shadow-2);
            overflow: hidden;
        }

        .result-card.show {
            display: block;
        }

        .result-card.secret-mode {
            border-color: var(--seal);
        }

        .result-secret-banner {
            padding: 16px 22px 0;
            font-size: 12px;
            flex-direction: column;
            align-items: flex-start;
            gap: 10px;
            display: none;
        }

        .result-card.secret-mode .result-secret-banner {
            display: flex;
        }

        .result-secret-chip-row {
            display: flex;
            gap: 10px;
            align-items: center;
            flex-wrap: wrap;
        }

        .result-secret-chip,
        .result-secret-outline {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 11px;
            border-radius: var(--r-1);
            font-size: 12px;
            font-weight: 600;
        }

        .result-secret-chip {
            background: var(--seal-tint);
            color: var(--seal-2);
        }

        .result-secret-outline {
            border: 1px solid var(--seal);
            color: var(--seal);
            background: var(--paper);
        }

        .result-secret-chip i,
        .result-secret-outline svg {
            width: 13px;
            height: 13px;
            flex-shrink: 0;
        }

        .result-secret-note {
            width: 100%;
            padding: 12px 14px;
            border: 1px dashed var(--seal);
            border-radius: var(--r-2);
            background: var(--paper);
            color: var(--ink-2);
            line-height: 1.5;
        }

        .result-secret-note strong {
            color: var(--ink);
            font-weight: 700;
        }

        .result-main {
            padding: 22px 22px 12px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }

        .result-url {
            font-family: var(--font-mono);
            font-size: clamp(1.125rem, 3vw, 1.375rem);
            font-weight: 700;
            letter-spacing: -0.01em;
            color: var(--ink);
            word-break: break-all;
        }

        .result-url-scheme {
            color: var(--ink-3);
            font-weight: 500;
        }

        .result-url-host {
            color: var(--ink);
        }

        .result-url-slug {
            color: var(--ink);
        }

        .result-card.secret-mode .result-url-slug {
            color: var(--seal);
        }

        .result-actions {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }

        .status-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 10px;
            border-radius: var(--r-1);
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.01em;
        }

        .status-chip.success {
            background: var(--ok-tint);
            color: var(--ok);
        }

        .status-chip.warn {
            background: var(--warn-tint);
            color: var(--warn);
        }

        .status-chip.danger {
            border: 1px solid rgba(181, 52, 30, 0.2);
            color: var(--danger);
            background: var(--paper);
        }

        .result-meta {
            padding: 10px 22px 18px;
            display: flex;
            align-items: center;
            gap: 18px;
            border-top: 1px solid var(--paper-3);
            margin-top: 6px;
            padding-top: 14px;
            font-size: 12px;
            color: var(--ink-3);
            flex-wrap: wrap;
        }

        .result-original {
            font-family: var(--font-mono);
            font-size: 12px;
            color: var(--ink-3);
            text-decoration: line-through;
            flex: 1;
            min-width: 220px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .result-stat {
            font-size: 11px;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            font-weight: 600;
            color: var(--ink-3);
        }

        .result-link-btn {
            background: transparent;
            border: 0;
            color: var(--ink-3);
            font-family: var(--font-sans);
            font-size: 12px;
            font-weight: 600;
            cursor: pointer;
            padding: 0;
            transition: color var(--t-fast) var(--ease);
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .result-link-btn svg {
            width: 13px;
            height: 13px;
            flex-shrink: 0;
        }

        .result-link-btn:hover {
            color: var(--ink);
        }

        .result-link-btn.anchor-right {
            margin-left: auto;
        }

        .result-qr {
            display: none;
            padding: 0 22px 22px;
        }

        .result-qr.show {
            display: block;
            animation: fadeUp var(--t-slow) var(--ease);
        }

        .result-qr-box {
            border: 1px solid var(--border);
            border-radius: var(--r-2);
            padding: 16px;
            background: var(--paper-2);
            display: grid;
            grid-template-columns: 112px 1fr;
            gap: 16px;
            align-items: center;
        }

        .result-card.qr-focus .result-qr-box {
            grid-template-columns: 144px 1fr;
            padding: 20px;
            border-color: var(--ink);
            box-shadow: var(--shadow-2);
        }

        .result-card.qr-focus .result-qr-canvas {
            width: 144px;
            height: 144px;
        }

        .result-qr-canvas {
            width: 112px;
            height: 112px;
            border-radius: var(--r-2);
            background: var(--paper);
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            box-shadow: var(--shadow-1);
        }

        .result-qr-canvas canvas,
        .result-qr-canvas img {
            width: 100%;
            height: 100%;
        }

        .result-qr-copy {
            color: var(--ink-2);
            font-size: 0.8125rem;
            line-height: 1.7;
        }

        .result-qr-copy strong {
            display: block;
            font-size: 0.6875rem;
            color: var(--ink-3);
            letter-spacing: 0.08em;
            text-transform: uppercase;
            margin-bottom: 6px;
        }

        .result-qr-copy code {
            display: block;
            margin-top: 10px;
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--ink);
        }

        .copy-btn,
        .ghost-btn {
            padding: 8px 14px;
            background: var(--ink);
            border: 0;
            border-radius: var(--r-1);
            color: var(--paper);
            font-weight: 600;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            font-size: 0.75rem;
            transition:
                background var(--t-fast) var(--ease),
                color var(--t-fast) var(--ease),
                transform var(--t-fast) var(--ease),
                border-color var(--t-fast) var(--ease);
            text-decoration: none;
            min-height: 32px;
            white-space: nowrap;
        }

        .copy-btn:hover,
        .ghost-btn:hover {
            opacity: 1;
        }

        .copy-btn i,
        .ghost-btn svg {
            width: 14px;
            height: 14px;
            flex-shrink: 0;
        }

        .copy-btn.copied {
            background: var(--ok);
            border-color: var(--ok);
        }

        .ghost-btn {
            background: var(--paper);
            color: var(--ink);
            border: 1px solid var(--ink);
        }

        .ghost-btn:hover {
            background: var(--paper);
            color: var(--ink);
        }

        .copy-btn:active,
        .ghost-btn:active,
        .submit-inline:active,
        .submit-full:active,
        .result-link-btn:active {
            transform: scale(0.97);
        }

        /* ── URL input clear button ── */
        .url-valid-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--ok);
            opacity: 0;
            transition: opacity var(--t-fast) var(--ease);
            flex-shrink: 0;
        }

        .url-valid-dot.show {
            opacity: 1;
        }

        .url-clear-btn {
            background: none;
            border: none;
            color: var(--ink-4);
            cursor: pointer;
            padding: 5px;
            display: none;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            border-radius: var(--r-1);
            transition: color var(--t-fast) var(--ease);
            margin-right: 2px;
        }

        .url-clear-btn svg {
            width: 14px;
            height: 14px;
        }

        .url-clear-btn:hover {
            color: var(--ink);
        }

        .url-clear-btn.visible {
            display: flex;
        }

        /* ── Paste button (mobile only) ── */
        /* ── Valid URL state ── */
        .url-input-shell.is-valid {
            border-color: var(--ok);
        }

        .url-input-shell.is-valid:focus-within {
            box-shadow: 0 0 0 3px rgba(31, 111, 67, 0.15);
        }

        /* ── Custom code counter ── */
        .custom-counter {
            font-family: var(--font-mono);
            font-size: 0.6875rem;
            color: var(--ink-4);
            padding: 0 14px 0 0;
            white-space: nowrap;
            flex-shrink: 0;
            transition: color var(--t-fast) var(--ease);
        }

        /* ── Recent links ── */
        .recent-links {
            margin-top: 12px;
            border: 1px solid var(--border);
            border-top: 2px solid var(--ink-4);
            border-radius: var(--r-3);
            overflow: hidden;
            animation: fadeUp 0.3s var(--ease);
        }

        .recent-links-header {
            display: flex;
            align-items: center;
            gap: 7px;
            padding: 10px 16px;
            background: var(--paper-2);
            border-bottom: 1px solid var(--border);
            font-size: 0.6875rem;
            font-weight: 700;
            letter-spacing: 0.1em;
            text-transform: uppercase;
            color: var(--ink-3);
        }

        .recent-links-header svg {
            width: 12px;
            height: 12px;
        }

        .recent-link-item {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 9px 16px;
            border-bottom: 1px solid var(--border-soft);
        }

        .recent-link-item:last-child {
            border-bottom: none;
        }

        .recent-link-url {
            font-family: var(--font-mono);
            font-size: 0.8125rem;
            font-weight: 600;
            color: var(--ink);
            text-decoration: none;
            flex-shrink: 0;
            transition: color var(--t-fast) var(--ease);
        }

        .recent-link-url:hover {
            color: var(--seal);
        }

        .recent-link-original {
            flex: 1;
            min-width: 0;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            font-size: 0.75rem;
            color: var(--ink-4);
            font-family: var(--font-mono);
        }

        .recent-link-copy {
            flex-shrink: 0;
            background: none;
            border: 1px solid var(--border);
            border-radius: var(--r-1);
            color: var(--ink-3);
            font-size: 0.6875rem;
            font-weight: 600;
            padding: 3px 9px;
            cursor: pointer;
            transition:
                border-color var(--t-fast) var(--ease),
                color var(--t-fast) var(--ease);
        }

        .recent-link-copy:hover {
            border-color: var(--ink);
            color: var(--ink);
        }

        .recent-link-copy.copied {
            border-color: var(--ok);
            color: var(--ok);
        }

        /* ================================================================
         * TRUST BADGES
         * ================================================================ */
        .trust-row {
            display: flex;
            justify-content: center;
            align-items: stretch;
            margin-top: 32px;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            background: var(--paper);
            overflow: hidden;
            animation: fadeUp 0.5s 0.24s var(--ease) both;
            box-shadow: var(--shadow-1);
        }

        .trust-item {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            justify-content: center;
            gap: 8px;
            padding: 18px 20px;
            text-align: left;
        }

        .trust-divider {
            width: 1px;
            background: var(--border);
            flex-shrink: 0;
        }

        .trust-item strong {
            font-family: var(--font-mono);
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--ink-3);
            line-height: 1;
        }

        .trust-item span {
            font-size: 0.9375rem;
            font-weight: 600;
            color: var(--ink);
            line-height: 1.45;
        }

        @media (max-width: 640px) {
            .trust-row {
                overflow-x: auto;
                -webkit-overflow-scrolling: touch;
                scrollbar-width: none;
                flex-wrap: nowrap;
                justify-content: flex-start;
                border-left: none;
                border-right: none;
                margin-top: 20px;
            }

            .trust-row::-webkit-scrollbar {
                display: none;
            }

            .trust-divider {
                display: none;
            }

            .trust-item {
                flex-direction: column;
                align-items: flex-start;
                min-width: 130px;
                max-width: 160px;
                flex-shrink: 0;
                border-right: 1px solid var(--border);
                padding: 14px 16px;
                gap: 5px;
            }

            .trust-item:last-child {
                border-right: none;
            }

            .trust-item strong {
                font-size: 0.65rem;
            }

            .trust-item span {
                font-size: 0.8125rem;
                line-height: 1.4;
            }
        }

        /* ================================================================
         * FOOTER SEO LINKS (관련 페이지 — 크롤링용, 최소 노출)
         * ================================================================ */
        .footer-seo-links {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 14px;
        }

        .footer-seo-links a {
            color: var(--ink-4);
            font-size: 0.75rem;
            text-decoration: none;
            transition: color var(--t-base) var(--ease);
        }

        .footer-seo-links a:hover {
            color: var(--ink-3);
        }

        /* ================================================================
         * SECTIONS
         * ================================================================ */
        .section {
            padding: 96px 24px;
            max-width: 100vw;
        }

        .container {
            max-width: 1080px;
            margin: 0 auto;
            width: 100%;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.72rem;
            font-weight: 700;
            letter-spacing: 0.1em;
            text-transform: uppercase;
            color: var(--ink-3);
            margin-bottom: 16px;
        }

        .section-tag::before {
            content: "";
            display: inline-block;
            width: 16px;
            height: 1px;
            background: var(--ink-3);
        }

        .section-title {
            font-family: var(--font-display);
            font-size: clamp(1.75rem, 4vw, 2.5rem);
            font-weight: 700;
            letter-spacing: -0.03em;
            line-height: 1.2;
            margin-bottom: 14px;
            color: var(--ink);
        }

        .section-sub {
            color: var(--ink-3);
            font-size: 1rem;
            max-width: 560px;
            line-height: 1.75;
        }

        /* ================================================================
         * FEATURES
         * ================================================================ */
        .features-bg {
            background: var(--paper-2);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .features-header {
            text-align: center;
            margin-bottom: 56px;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            border-left: 1px solid var(--border);
            border-top: 1px solid var(--border);
        }

        .feat-card {
            padding: 28px 24px;
            border-right: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            transition: background var(--t-base) var(--ease);
        }

        .feat-card:hover {
            background: var(--paper);
        }

        /* lock icon always carries the seal — one colored icon per brand rules */
        .feat-card:nth-child(2) .feat-icon {
            color: var(--seal);
        }

        .feat-icon {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--ink-3);
            margin-bottom: 16px;
        }

        .feat-icon svg {
            width: 22px;
            height: 22px;
        }

        .feat-title {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--ink);
        }

        .feat-desc {
            color: var(--ink-3);
            font-size: 0.875rem;
            line-height: 1.7;
        }

        @media (max-width: 768px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 480px) {
            .features-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ================================================================
         * UPTIME STRIP (통합 "왜 rul·kr" 섹션 하단의 경량 상태 바)
         * ================================================================ */
        .uptime-strip {
            display: flex;
            align-items: center;
            gap: 32px;
            margin-top: 48px;
            padding: 24px 28px;
            border: 1px solid var(--border);
            border-radius: var(--r-3);
            background: var(--paper-2);
        }

        .uptime-strip-stat {
            flex: 0 0 auto;
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .uptime-strip-num {
            font-family: var(--font-mono);
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--ink);
            letter-spacing: -0.02em;
            line-height: 1;
        }

        .uptime-strip-label {
            font-size: 0.75rem;
            color: var(--ink-3);
        }

        .uptime-strip-live {
            flex: 0 0 auto;
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.8125rem;
            font-weight: 600;
            padding-left: 24px;
            border-left: 1px solid var(--border);
        }

        @media (max-width: 768px) {
            .uptime-strip {
                flex-wrap: wrap;
                gap: 16px;
            }

            .uptime-bars {
                order: 3;
                width: 100%;
            }

            .uptime-strip-live {
                border-left: none;
                padding-left: 0;
            }
        }

        /* ================================================================
         * FAQ
         * ================================================================ */
        .faq-list {
            max-width: 720px;
            margin: 48px auto 0;
        }

        .faq-item {
            border-bottom: 1px solid var(--border);
        }

        .faq-item:first-child {
            border-top: 1px solid var(--border);
        }

        .faq-q {
            width: 100%;
            border: none;
            background: none;
            font-family: inherit;
            text-align: left;
            padding: 20px 0;
            font-weight: 600;
            font-size: 0.9375rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            gap: 16px;
            color: var(--ink);
            user-select: none;
        }

        .faq-icon {
            flex-shrink: 0;
            width: 20px;
            height: 20px;
            color: var(--ink-3);
            transition:
                transform var(--t-base) var(--ease),
                color var(--t-base) var(--ease);
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            color: var(--ink);
        }

        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition:
                max-height 0.35s var(--ease),
                padding 0.25s var(--ease);
            color: var(--ink-3);
            font-size: 0.9rem;
            line-height: 1.75;
        }

        .faq-item.open .faq-a {
            max-height: 400px;
            padding-bottom: 20px;
        }

        /* ================================================================
         * FOOTER
         * ================================================================ */
        .footer {
            background: var(--paper);
            border-top: 1px solid var(--border);
            padding: 40px 24px;
            text-align: center;
        }

        .footer-logo {
            font-size: 1.1rem;
            font-weight: 800;
            letter-spacing: -0.04em;
            margin-bottom: 16px;
            color: var(--ink);
        }

        .footer-logo .dot {
            color: var(--seal);
        }

        .footer-links {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
            margin-bottom: 14px;
        }

        .footer-links a {
            color: var(--ink-4);
            font-size: 0.8125rem;
            text-decoration: none;
            transition: color var(--t-base) var(--ease);
        }

        .footer-links a:hover {
            color: var(--ink);
        }

        .footer-copy {
            color: var(--ink-4);
            font-size: 0.75rem;
        }

        /* ================================================================
         * NAV STATUS INDICATOR
         * ================================================================ */
        .nav-status {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 0.72rem;
            font-weight: 700;
            color: var(--ok);
            font-family: var(--font-mono);
            letter-spacing: 0.04em;
            text-transform: uppercase;
            user-select: none;
        }

        .nav-status-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--ok);
            flex-shrink: 0;
        }

        @media (max-width: 540px) {
            .nav-status {
                display: none !important;
            }
        }

        /* ================================================================
         * UPTIME (live dot / status text — used inside .uptime-strip)
         * ================================================================ */
        .uptime-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--ink-4);
            flex-shrink: 0;
            transition: background var(--t-slow) var(--ease);
        }

        .uptime-dot.up {
            background: var(--ok);
            animation: uptimePulse 2.5s ease-in-out infinite;
        }

        .uptime-dot.down {
            background: var(--danger);
        }

        @keyframes uptimePulse {

            0%,
            100% {
                opacity: 1;
            }

            50% {
                opacity: 0.4;
            }
        }

        .uptime-status-text {
            color: var(--ok);
        }

        .uptime-status-text.checking {
            color: var(--ink-4);
        }

        .uptime-status-text.down {
            color: var(--danger);
        }


        /* ================================================================
         * ANIMATIONS
         * ================================================================ */
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }

            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes shake {

            0%,
            100% {
                transform: translateX(0);
            }

            18% {
                transform: translateX(-7px);
            }

            36% {
                transform: translateX(7px);
            }

            54% {
                transform: translateX(-4px);
            }

            72% {
                transform: translateX(4px);
            }
        }

        @keyframes urlFlash {
            0% {
                opacity: 1;
            }

            25% {
                opacity: 0.45;
            }

            100% {
                opacity: 1;
            }
        }

        .url-input-shell.shake {
            animation: shake 0.38s var(--ease);
        }

        .result-url.flash {
            animation: urlFlash 0.5s var(--ease);
        }

        @keyframes confettiFall {
            0% {
                transform: translateY(0) rotate(0deg) scale(1);
                opacity: 1;
            }

            100% {
                transform: translateY(110vh) rotate(600deg) scale(0.6);
                opacity: 0;
            }
        }

        .reveal {
            opacity: 0;
            transform: translateY(24px);
            transition:
                opacity 0.6s var(--ease),
                transform 0.6s var(--ease);
        }

        .reveal.in {
            opacity: 1;
            transform: translateY(0);
        }

        /* ================================================================
         * MOBILE
         * ================================================================ */
        @media (max-width: 640px) {
            .input-wrapper {
                flex-direction: column;
                align-items: stretch;
            }

            .form-input {
                height: 60px;
                font-size: 16px;
                padding: 0 0 0 2px;
            }

            .url-input-shell {
                height: 60px;
                width: 100%;
                padding: 0 6px 0 16px;
            }

            .custom-input {
                font-size: 16px;
                height: 60px;
            }

            .custom-prefix {
                font-size: 15px;
                height: 60px;
            }

            .toggle-row {
                margin-top: 10px;
            }

            .submit-inline {
                display: none;
            }

            .submit-full {
                display: flex;
                height: 60px;
                font-size: 16px;
            }

            .form-card {
                padding: 20px 16px;
            }

            .hero {
                min-height: auto;
                padding: 40px 16px 32px;
            }

            .hero-brand {
                flex-direction: column;
                gap: 16px;
            }

            .hero-wordmark-block {
                align-items: center;
                text-align: center;
            }

            .hero-eyebrow {
                margin-bottom: 16px;
            }

            .hero-h1 {
                font-size: clamp(1.9rem, 8vw, 2.8rem);
                margin-bottom: 14px;
            }

            .hero-desc {
                margin-bottom: 24px;
            }

            .toggle-label {
                font-size: 0.8125rem;
                padding: 9px 10px;
            }

            .trust-row {
                gap: 12px;
                margin-top: 20px;
            }

            .trust-item {
                padding: 12px 14px;
            }

            .trust-item {
                font-size: 0.75rem;
            }

            .result-actions {
                width: 100%;
            }

            .result-actions .copy-btn,
            .result-actions .ghost-btn {
                flex: 1;
                justify-content: center;
            }

            .result-qr-box {
                grid-template-columns: 1fr;
                text-align: center;
            }

            .result-qr-canvas {
                margin: 0 auto;
            }

            .result-link-btn {
                margin-left: 0;
            }

            .section {
                padding: 64px 16px;
            }
        }

        @media (max-width: 400px) {
            .toggle-row {
                flex-direction: column;
            }

            .toggle-label {
                justify-content: flex-start;
                padding: 11px 14px;
            }
        }

        /* ================================================================
         * NAV BLUR ON SCROLL
         * ================================================================ */
        .navbar {
            transition:
                background var(--t-base) var(--ease),
                box-shadow var(--t-base) var(--ease),
                backdrop-filter var(--t-base) var(--ease);
        }

        .navbar.scrolled {
            background: rgba(250, 250, 247, 0.88);
            backdrop-filter: saturate(180%) blur(14px);
            -webkit-backdrop-filter: saturate(180%) blur(14px);
            box-shadow: 0 1px 0 var(--border);
        }

        /* ================================================================
         * LIVE URL STATS PANEL
         * ================================================================ */
        .url-live-stats {
            display: none;
            align-items: center;
            gap: 8px;
            padding: 7px 12px;
            background: var(--paper-2);
            border: 1px solid var(--border);
            border-radius: var(--r-2);
            margin-top: 8px;
            font-size: 0.72rem;
            overflow: hidden;
            animation: fadeUp 0.18s var(--ease);
        }

        .url-live-stats.show {
            display: flex;
        }

        .url-domain-favicon {
            width: 13px;
            height: 13px;
            border-radius: 2px;
            object-fit: cover;
            flex-shrink: 0;
        }

        .url-domain-badge {
            font-weight: 600;
            color: var(--ink-2);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            max-width: 140px;
        }

        .url-compress-bar {
            flex: 1;
            height: 3px;
            background: var(--paper-3);
            border-radius: 99px;
            overflow: hidden;
            min-width: 40px;
        }

        .url-compress-fill {
            height: 100%;
            background: linear-gradient(90deg, var(--seal-2), var(--seal));
            border-radius: 99px;
            width: 0%;
            transition: width 0.5s cubic-bezier(0.2, 0.7, 0.2, 1);
        }

        .url-char-count {
            font-family: var(--font-mono);
            font-size: 0.6875rem;
            color: var(--ink-3);
            white-space: nowrap;
            flex-shrink: 0;
        }

        .url-compress-ratio {
            font-family: var(--font-mono);
            font-size: 0.6875rem;
            font-weight: 700;
            color: var(--seal);
            white-space: nowrap;
            flex-shrink: 0;
            min-width: 32px;
            text-align: right;
        }

        /* ================================================================
         * INK RIPPLE (copy button feedback)
         * ================================================================ */
        .copy-btn {
            position: relative;
            overflow: hidden;
        }

        .ink-ripple {
            position: absolute;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: rgba(250, 250, 247, 0.55);
            pointer-events: none;
            animation: inkSpread 0.5s cubic-bezier(0.2, 0.7, 0.2, 1) forwards;
            transform-origin: center;
            transform: translate(-50%, -50%);
        }

        @keyframes inkSpread {
            0% {
                transform: translate(-50%, -50%) scale(0);
                opacity: 1;
            }

            100% {
                transform: translate(-50%, -50%) scale(20);
                opacity: 0;
            }
        }

        /* ================================================================
         * RESULT CARD - ENHANCED ENTRANCE + SWIPE
         * ================================================================ */
        @keyframes cardRevealIn {
            0% {
                opacity: 0;
                transform: scale(0.93) translateY(14px);
            }

            65% {
                transform: scale(1.015) translateY(-3px);
            }

            100% {
                opacity: 1;
                transform: scale(1) translateY(0);
            }
        }

        .result-card.show {
            animation: cardRevealIn 0.42s cubic-bezier(0.2, 0.7, 0.2, 1) both;
        }

        .result-card {
            position: relative;
            overflow: hidden;
            touch-action: pan-y;
        }

        /* Swipe overlay */
        .result-swipe-overlay {
            position: absolute;
            inset: 0;
            border-radius: var(--r-3);
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            pointer-events: none;
            font-size: 0.875rem;
            font-weight: 700;
            gap: 8px;
            transition: opacity 0.1s;
        }

        .result-swipe-overlay.copy-mode {
            background: rgba(31, 111, 67, 0.1);
            color: var(--ok);
        }

        .result-swipe-overlay.open-mode {
            background: rgba(14, 14, 16, 0.07);
            color: var(--ink-2);
        }

        /* Swipe hint text (mobile only) */
        .swipe-hint {
            display: none;
            justify-content: center;
            align-items: center;
            gap: 20px;
            padding: 9px 0 0;
            color: var(--ink-4);
            font-size: 0.6875rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            animation: fadeUp 0.4s 0.3s var(--ease) both;
        }

        .swipe-hint-item {
            display: flex;
            align-items: center;
            gap: 5px;
        }

        @media (max-width: 640px) {
            .swipe-hint {
                display: flex;
            }
        }

        /* ================================================================
         * FORM CARD SUBMIT RIPPLE
         * ================================================================ */
        .form-ripple {
            position: absolute;
            border-radius: 50%;
            background: rgba(230, 58, 31, 0.08);
            pointer-events: none;
            animation: formRipple 0.7s cubic-bezier(0.2, 0.7, 0.2, 1) forwards;
            transform: translate(-50%, -50%) scale(0);
        }

        @keyframes formRipple {
            to {
                transform: translate(-50%, -50%) scale(6);
                opacity: 0;
            }
        }

        /* ================================================================
         * UPTIME MINI BARS
         * ================================================================ */
        .uptime-bars {
            display: flex;
            flex: 1;
            gap: 2px;
            align-items: flex-end;
            height: 28px;
            min-width: 120px;
        }

        .uptime-bar {
            flex: 1;
            background: var(--ok);
            border-radius: 2px 2px 0 0;
            opacity: 0.72;
        }

        .uptime-bar.down {
            background: var(--danger);
            opacity: 0.55;
        }

        /* ================================================================
         * ENHANCED CONFETTI (seal-colored)
         * ================================================================ */
        @keyframes confettiFall {
            0% {
                transform: translateY(0) rotate(0deg) scale(1);
                opacity: 1;
            }

            100% {
                transform: translateY(110vh) rotate(600deg) scale(0.5);
                opacity: 0;
            }
        }

        /* ================================================================
         * MOBILE SAFE AREA
         * ================================================================ */
        .footer {
            padding-bottom: max(40px, env(safe-area-inset-bottom, 40px));
        }

        @media (max-width: 640px) {
            .submit-full {
                margin-bottom: env(safe-area-inset-bottom, 0);
            }
        }

        /* ================================================================
         * TRUST ROW — HOVER MICRO INTERACTION
         * ================================================================ */
        .trust-item {
            cursor: default;
            transition: background var(--t-base) var(--ease);
        }

        .trust-item:hover {
            background: var(--paper-2);
        }

        .trust-item strong {
            transition: color var(--t-base) var(--ease);
        }

        .trust-item:hover strong {
            color: var(--seal);
        }

        /* ================================================================
         * FEATURE CARD — STAGGER + ICON POP
         * ================================================================ */
        .feat-card {
            cursor: default;
        }

        .feat-card:hover .feat-icon svg {
            transform: scale(1.18) rotate(-6deg);
        }

        .feat-icon svg {
            transition: transform var(--t-base) var(--ease);
        }


        /* ================================================================
         * FAQ ITEM — ENHANCED HOVER
         * ================================================================ */
        .faq-q:hover {
            color: var(--ink);
        }

        .faq-q:hover .faq-icon {
            color: var(--ink);
        }

        /* ================================================================
         * RESULT META — COMPRESSION HIGHLIGHT
         * ================================================================ */
        .result-stat {
            background: var(--paper-2);
            border: 1px solid var(--border);
            border-radius: var(--r-1);
            padding: 2px 8px;
            transition:
                border-color var(--t-base) var(--ease),
                color var(--t-base) var(--ease);
        }

        .result-stat:hover {
            border-color: var(--seal);
            color: var(--seal);
        }

        /* ================================================================
         * URL DISSOLVE ON SUBMIT
         * ================================================================ */
        @keyframes urlDissolve {
            0% {
                opacity: 1;
                filter: blur(0px);
            }

            50% {
                opacity: 0.4;
                filter: blur(3px);
                letter-spacing: 0.1em;
            }

            100% {
                opacity: 0;
                filter: blur(6px);
            }
        }

        .form-input.dissolving {
            animation: urlDissolve 0.35s var(--ease) forwards;
        }

        /* ================================================================
         * RESULT SLUG GLOW AFTER TYPEWRITER
         * ================================================================ */
        @keyframes slugGlow {
            0% {
                text-shadow: 0 0 0px transparent;
            }

            40% {
                text-shadow: 0 0 18px rgba(230, 58, 31, 0.35);
            }

            100% {
                text-shadow: 0 0 0px transparent;
            }
        }

        .result-url-slug.glow {
            animation: slugGlow 0.9s cubic-bezier(0.2, 0.7, 0.2, 1) both;
        }

        /* ================================================================
         * QR SKELETON LOADER
         * ================================================================ */
        @keyframes shimmer {
            0% {
                background-position: -200px 0;
            }

            100% {
                background-position: 200px 0;
            }
        }

        .qr-skeleton {
            width: 100%;
            height: 100%;
            border-radius: var(--r-2);
            background: linear-gradient(90deg, var(--paper-3) 25%, var(--paper-2) 50%, var(--paper-3) 75%);
            background-size: 400px 100%;
            animation: shimmer 1.2s infinite;
        }

        /* ================================================================
         * KEYBOARD SHORTCUT CHIP IN BUTTON
         * ================================================================ */
        .kbd-hint {
            display: inline-flex;
            align-items: center;
            gap: 1px;
            font-size: 0.6rem;
            opacity: 0.5;
            margin-left: 4px;
            font-family: var(--font-mono);
            letter-spacing: 0;
        }

        @media (max-width: 640px) {
            .kbd-hint {
                display: none;
            }
        }

        /* ================================================================
         * LOGO HOVER ANIMATION
         * ================================================================ */
        .logo {
            transition: letter-spacing var(--t-base) var(--ease);
        }

        .logo:hover {
            letter-spacing: -0.02em;
        }

        .logo .dot {
            transition:
                transform var(--t-base) var(--ease),
                color var(--t-fast) var(--ease);
            display: inline-block;
        }

        .logo:hover .dot {
            transform: scale(1.5);
            color: var(--seal);
        }

        /* ================================================================
         * HERO STAMP — PULSE HOVER
         * ================================================================ */
        .hero-stamp {
            cursor: default;
            transition:
                transform var(--t-base) var(--ease),
                box-shadow var(--t-base) var(--ease);
        }

        .hero-stamp:hover {
            transform: rotate(-2deg) scale(1.04);
            box-shadow: 4px 4px 0 var(--ink);
        }

        .hero-stamp-dot {
            transition: transform var(--t-slow) var(--ease);
        }

        .hero-stamp:hover .hero-stamp-dot {
            transform: scale(1.5);
        }

        /* ================================================================
         * DARK MODE OVERRIDES
         * ================================================================ */
        @media (prefers-color-scheme: dark) {
            .navbar {
                background: rgba(15, 15, 17, 0.94);
                border-bottom-color: var(--border);
                backdrop-filter: blur(12px);
            }

            .navbar.scrolled {
                background: rgba(15, 15, 17, 0.98);
            }

            .hero-stamp {
                border-color: var(--ink-4);
                color: var(--ink-3);
            }

            .form-card {
                background: #1a1a20;
                box-shadow:
                    0 4px 32px rgba(0, 0, 0, 0.5),
                    0 0 0 1px #2c2c38;
            }

            .result-card {
                background: #1a1a20;
                box-shadow:
                    0 4px 32px rgba(0, 0, 0, 0.5),
                    0 0 0 1px #2c2c38;
            }

            /* 섹션 배경 확실히 구분 */
            .features-bg {
                background: #17171d;
                border-top-color: #2a2a34;
                border-bottom-color: #2a2a34;
            }

            .uptime-strip {
                background: #17171d;
                border-color: #2a2a34;
            }

            .uptime-strip-live {
                border-left-color: #2a2a34;
            }

            .feat-card {
                background: #1e1e26;
                border-color: #2c2c38;
            }

            /* FAQ */
            .faq-item {
                border-color: #2a2a34;
            }

            .faq-q {
                color: var(--ink);
            }

            .faq-a {
                color: var(--ink-3);
            }

            .faq-item.open .faq-q {
                color: var(--ink);
            }

            /* 기타 */
            .footer {
                background: #0d0d0f;
                border-top-color: #2a2a34;
            }

            .result-qr-copy code {
                background: #222230;
                color: var(--ink-2);
            }

            .toggle-label {
                border-color: #2c2c38;
                background: #1e1e26;
                color: var(--ink-3);
            }

            .toggle-radio:checked+.toggle-label {
                background: #2a2a36;
                color: var(--ink);
                border-color: var(--ink-3);
            }

            .section:not(.features-bg) {
                background: var(--paper);
            }

            .url-field {
                background: #1a1a22;
                border-color: #2c2c38;
            }

            .form-input {
                background: #0f0f13;
                color: var(--ink);
                border-color: #2c2c38;
            }

            .form-input::placeholder {
                color: var(--ink-4);
            }
        }