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

        :root {
            /* Black, White & Grays Structure */
            --bg: #fafafa;
            --bg-secondary: #ffffff;
            --bg-tertiary: #f4f4f5;
            --text: #09090b;
            --text-muted: #71717a;
            --border: #e4e4e7;
            --border-strong: #18181b;
            --accent: #18181b;       /* Structural Black */
            --white: #ffffff;

            /* Vibrant Accents */
            --brand-primary: #4f46e5;   /* Indigo */
            --brand-secondary: #0ea5e9; /* Sky Blue */
            --brand-tertiary: #f43f5e;  /* Rose */
            --glow-primary: rgba(79, 70, 229, 0.25);
            
            /* UI Metrics */
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
            --shadow-hover: 0 10px 30px rgba(79, 70, 229, 0.15);
            --radius-md: 8px;
            --radius-lg: 16px;
            --radius-pill: 9999px;
            --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
            --transition-bounce: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
        }

        [data-theme="dark"] {
            --bg: #09090b;
            --bg-secondary: #18181b;
            --bg-tertiary: #27272a;
            --text: #f4f4f5;
            --text-muted: #a1a1aa;
            --border: #27272a;
            --border-strong: #e4e4e7;
            --accent: #ffffff;       /* Structural White */
            --white: #09090b;
            --brand-primary: #818cf8;
            --brand-secondary: #38bdf8;
            --brand-tertiary: #fb7185;
            --glow-primary: rgba(129, 140, 248, 0.2);
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.4);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.5);
            --shadow-hover: 0 10px 30px rgba(129, 140, 248, 0.15);
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', system-ui, sans-serif;
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.6;
            transition: background-color 0.4s ease, color 0.4s ease;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            overflow-x: hidden;
        }

        /* ── Animations ── */
        @keyframes fadeUp {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }

        @keyframes scaleIn {
            from { opacity: 0; transform: scale(0.95); }
            to { opacity: 1; transform: scale(1); }
        }

        @keyframes floatingIcon {
            0% { transform: translateY(0px); }
            50% { transform: translateY(-4px); }
            100% { transform: translateY(0px); }
        }

        @keyframes borderPulse {
            0% { border-color: var(--border-strong); }
            50% { border-color: var(--brand-primary); box-shadow: 0 0 15px var(--glow-primary); }
            100% { border-color: var(--border-strong); }
        }

        .animate-fade-up { animation: fadeUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) both; }
        .delay-100 { animation-delay: 100ms; }
        .delay-200 { animation-delay: 200ms; }
        .delay-300 { animation-delay: 300ms; }

        /* ── Scrollbar ── */
        ::-webkit-scrollbar { width: 8px; }
        ::-webkit-scrollbar-track { background: var(--bg); }
        ::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
        ::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

        /* ── Navbar ── */
        .navbar {
            background-color: var(--bg-secondary);
            border-bottom: 1px solid var(--border);
            padding: 0 2rem;
            height: 70px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            position: sticky;
            top: 0;
            z-index: 100;
            backdrop-filter: blur(12px);
            background: rgba(var(--bg-secondary), 0.85); /* Requires separate RGB var to be rigorous, but fallback works */
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            text-decoration: none;
            transition: var(--transition-bounce);
        }

        .navbar-brand:hover {
            transform: scale(1.03);
        }

        .navbar-brand img {
            height: 40px;
            filter: var(--logo-filter, none);
            transition: filter 0.3s;
        }

        [data-theme="dark"] .navbar-brand img {
            --logo-filter: invert(1);
        }

        .navbar-logo-text {
            font-weight: 800;
            font-size: 1.1rem;
            color: var(--text);
            letter-spacing: -0.02em;
        }

        .navbar-logo-text span {
            color: var(--brand-primary);
        }

        .navbar-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .icon-btn {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-pill);
            border: 1px solid var(--border);
            background: var(--bg);
            color: var(--text);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition-bounce);
            text-decoration: none;
            font-size: 1.1rem;
            position: relative;
            overflow: hidden;
        }

        .icon-btn::after {
            content: '';
            position: absolute;
            width: 100%;
            height: 100%;
            background: var(--brand-primary);
            top: 100%;
            left: 0;
            transition: var(--transition);
            z-index: 0;
        }

        .icon-btn i {
            position: relative;
            z-index: 1;
            transition: color 0.3s;
        }

        .icon-btn:hover {
            border-color: var(--brand-primary);
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        .icon-btn:hover::after {
            top: 0;
        }

        .icon-btn:hover i {
            color: #ffffff;
        }

        /* ── Main content ── */
        .main {
            flex: 1;
            max-width: 860px;
            width: 100%;
            margin: 0 auto;
            padding: 4rem 1.5rem;
        }

        /* ── Hero ── */
        .hero {
            text-align: center;
            margin-bottom: 3.5rem;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.75rem;
            font-weight: 700;
            letter-spacing: 0.1em;
            text-transform: uppercase;
            color: var(--brand-secondary);
            background: rgba(14, 165, 233, 0.1);
            border: 1px solid rgba(14, 165, 233, 0.2);
            border-radius: var(--radius-pill);
            padding: 0.35rem 1rem;
            margin-bottom: 1.5rem;
            animation: scaleIn 0.5s ease-out;
        }

        .hero-tag i {
            animation: floatingIcon 3s ease-in-out infinite;
        }

        .hero h1 {
            font-size: clamp(2rem, 5vw, 3.5rem);
            font-weight: 900;
            letter-spacing: -0.04em;
            line-height: 1.1;
            color: var(--text);
            margin-bottom: 1.25rem;
        }

        .hero h1 span {
            color: var(--brand-primary);
        }

        .hero p {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.7;
        }

        /* ── Form card ── */
        .form-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 2.5rem;
            margin-bottom: 3rem;
            box-shadow: var(--shadow-md);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .form-card::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0;
            height: 4px;
            background: var(--text); /* Solid structural black entry */
            transition: background 0.3s;
        }

        .form-card:focus-within::before {
            background: var(--brand-primary); /* Animates color on focus */
        }

        .form-label {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.85rem;
            font-weight: 700;
            letter-spacing: 0.05em;
            text-transform: uppercase;
            color: var(--text);
            margin-bottom: 0.75rem;
        }

        .form-label i {
            color: var(--brand-secondary);
        }

        .form-textarea {
            width: 100%;
            min-height: 160px;
            padding: 1.25rem;
            background: var(--bg);
            border: 2px solid var(--border);
            border-radius: var(--radius-md);
            color: var(--text);
            font-family: 'Inter', monospace;
            font-size: 0.95rem;
            line-height: 1.6;
            resize: vertical;
            transition: var(--transition);
            outline: none;
        }

        .form-textarea:focus {
            border-color: var(--brand-primary);
            box-shadow: 0 0 0 4px var(--glow-primary);
        }

        .form-textarea::placeholder {
            color: var(--border-strong);
            opacity: 0.5;
        }

        /* ── Advanced settings ── */
        .advanced-toggle {
            background: none;
            border: none;
            color: var(--text-muted);
            font-family: inherit;
            font-size: 0.85rem;
            font-weight: 600;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.5rem 0;
            transition: var(--transition);
        }

        .advanced-toggle:hover {
            color: var(--brand-primary);
        }

        .advanced-toggle .icon-wrap {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 24px; height: 24px;
            background: var(--bg-tertiary);
            border-radius: 50%;
            transition: var(--transition);
        }

        .advanced-toggle:hover .icon-wrap {
            background: var(--glow-primary);
        }

        .advanced-toggle .chevron {
            transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
        }

        .advanced-toggle.open .chevron {
            transform: rotate(180deg);
        }

        .advanced-grid {
            display: grid;
            grid-template-rows: 0fr;
            opacity: 0;
            transition: all 0.4s cubic-bezier(0.25, 1, 0.5, 1);
            margin-top: 0;
            padding-top: 0;
            border-top: 1px solid transparent;
        }

        .advanced-grid.visible {
            grid-template-rows: 1fr;
            opacity: 1;
            margin-top: 1.5rem;
            padding-top: 1.5rem;
            border-color: var(--border);
        }

        .advanced-grid-inner {
            overflow: hidden;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 1.25rem;
        }

        .input-field {
            width: 100%;
            padding: 0.75rem 1rem;
            background: var(--bg);
            border: 2px solid var(--border);
            border-radius: var(--radius-md);
            color: var(--text);
            font-family: inherit;
            font-size: 0.9rem;
            outline: none;
            transition: var(--transition);
        }

        .input-field:focus {
            border-color: var(--brand-secondary);
            box-shadow: 0 0 0 4px rgba(14, 165, 233, 0.2);
            transform: translateY(-1px);
        }

        /* ── Form actions ── */
        .form-actions {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: 1.5rem;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.75rem;
            background: var(--text);
            color: var(--bg);
            border: none;
            border-radius: var(--radius-pill);
            font-family: inherit;
            font-size: 1rem;
            font-weight: 700;
            padding: 0.85rem 2rem;
            cursor: pointer;
            letter-spacing: 0.02em;
            transition: var(--transition-bounce);
            text-decoration: none;
            overflow: hidden;
            position: relative;
        }

        .btn-primary::before {
            content: '';
            position: absolute;
            top: 0; left: -100%;
            width: 100%; height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
            transition: 0.5s;
        }

        .btn-primary:hover::before {
            left: 100%;
        }

        .btn-primary:hover {
            transform: translateY(-3px) scale(1.02);
            box-shadow: 0 10px 25px rgba(0,0,0,0.2);
            background: var(--brand-primary); /* Swaps from black/white to vibrant color on hover */
            color: #ffffff;
        }

        .btn-primary:active {
            transform: translateY(0) scale(0.98);
        }

        /* ── Results ── */
        #results {
            margin-bottom: 4rem;
        }

        .result-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 0;
            margin-bottom: 1.5rem;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            opacity: 0;
            animation: fadeUp 0.5s ease forwards;
            overflow: hidden;
        }

        .result-card:hover {
            box-shadow: var(--shadow-md);
        }

        /* ── Result Header ── */
        .result-header {
            padding: 1.5rem 1.75rem;
            border-bottom: 1px solid var(--border);
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .result-header-icon {
            width: 42px;
            height: 42px;
            border-radius: 10px;
            background: rgba(244, 63, 94, 0.1);
            color: var(--brand-tertiary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            flex-shrink: 0;
        }

        [data-theme="dark"] .result-header-icon {
            background: rgba(251, 113, 133, 0.15);
        }

        .result-header-info {
            flex: 1;
            min-width: 0;
        }

        .result-header-title {
            font-size: 1.1rem;
            font-weight: 800;
            color: var(--text);
            line-height: 1.3;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .result-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-top: 0.35rem;
        }

        .result-meta-tag {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--text-muted);
            background: var(--bg-tertiary);
            border: 1px solid var(--border);
            border-radius: var(--radius-pill);
            padding: 0.15rem 0.6rem;
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
        }

        .result-meta-tag i {
            font-size: 0.65rem;
            opacity: 0.7;
        }

        /* ── Stat Grid ── */
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
            gap: 0;
        }

        .stat-card {
            padding: 1.25rem 1.75rem;
            border-right: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            transition: background 0.2s;
        }

        .stat-card:hover {
            background: var(--bg-tertiary);
        }

        .stat-card:last-child {
            border-right: none;
        }

        .stat-label {
            font-size: 0.7rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--text-muted);
            margin-bottom: 0.35rem;
        }

        .stat-value {
            font-size: 1.05rem;
            font-weight: 800;
            color: var(--text);
            font-variant-numeric: tabular-nums;
            line-height: 1.3;
        }

        .stat-value.highlight {
            color: var(--brand-primary);
        }

        /* ── Speed Table ── */
        .speed-section {
            padding: 1.25rem 1.75rem;
        }

        .speed-section-title {
            font-size: 0.7rem;
            font-weight: 700;
            letter-spacing: 0.1em;
            text-transform: uppercase;
            color: var(--text-muted);
            margin-bottom: 0.75rem;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }

        .speed-section-title i {
            color: var(--brand-secondary);
            font-size: 0.75rem;
        }

        .speed-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
            gap: 0.5rem;
        }

        .speed-chip {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 0.5rem;
            background: var(--bg-tertiary);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 0.6rem 0.85rem;
            transition: var(--transition);
        }

        .speed-chip:hover {
            border-color: var(--brand-primary);
            background: var(--bg);
        }

        .speed-chip-label {
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--brand-primary);
            white-space: nowrap;
        }

        .speed-chip-value {
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--text);
            text-align: right;
            font-variant-numeric: tabular-nums;
        }

        /* ── Notice line (e.g. "limited to 500") ── */
        .result-notice {
            padding: 0.6rem 1.75rem;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--brand-tertiary);
            background: rgba(244, 63, 94, 0.06);
            border-bottom: 1px solid var(--border);
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }

        [data-theme="dark"] .result-notice {
            background: rgba(251, 113, 133, 0.08);
        }

        /* ── Loading Overlay ── */
        .loading-overlay {
            display: none;
            position: fixed;
            top: 0; left: 0; right: 0; bottom: 0;
            background: rgba(0, 0, 0, 0.4);
            backdrop-filter: blur(4px);
            z-index: 999;
            align-items: center;
            justify-content: center;
        }

        .loading-overlay.active { display: flex; }

        .loading-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 2.5rem 3rem;
            text-align: center;
            box-shadow: var(--shadow-md);
            animation: scaleIn 0.3s ease;
        }

        .loading-spinner {
            width: 40px; height: 40px;
            border: 3px solid var(--border);
            border-top-color: var(--brand-primary);
            border-radius: 50%;
            animation: spin 0.8s linear infinite;
            margin: 0 auto 1rem;
        }

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

        .loading-card p {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-muted);
        }

        /* ── Copy Tooltip ── */
        .copyable {
            cursor: pointer;
            position: relative;
            transition: color 0.2s;
        }

        .copyable:hover { color: var(--brand-primary); }

        .copy-toast {
            position: fixed;
            bottom: 2rem;
            left: 50%;
            transform: translateX(-50%) translateY(20px);
            background: var(--text);
            color: var(--bg);
            font-size: 0.8rem;
            font-weight: 700;
            padding: 0.5rem 1.25rem;
            border-radius: var(--radius-pill);
            opacity: 0;
            transition: all 0.3s ease;
            z-index: 1000;
            pointer-events: none;
        }

        .copy-toast.show {
            opacity: 1;
            transform: translateX(-50%) translateY(0);
        }

        /* ── Error Card ── */
        .error-card {
            background: var(--bg-secondary);
            border: 1px solid rgba(244, 63, 94, 0.3);
            border-radius: var(--radius-lg);
            padding: 2rem 1.75rem;
            margin-bottom: 1.5rem;
            text-align: center;
            animation: fadeUp 0.5s ease forwards;
        }

        .error-icon {
            width: 56px; height: 56px;
            border-radius: 50%;
            background: rgba(244, 63, 94, 0.1);
            color: var(--brand-tertiary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin: 0 auto 1rem;
        }

        [data-theme="dark"] .error-icon {
            background: rgba(251, 113, 133, 0.15);
        }

        .error-card h3 {
            font-size: 1.1rem;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 0.5rem;
        }

        .error-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 1.25rem;
            max-width: 400px;
            margin-left: auto;
            margin-right: auto;
        }

        .btn-retry {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: var(--brand-tertiary);
            color: #ffffff;
            border: none;
            border-radius: var(--radius-pill);
            font-family: inherit;
            font-size: 0.85rem;
            font-weight: 700;
            padding: 0.6rem 1.5rem;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
        }

        .btn-retry:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 15px rgba(244, 63, 94, 0.3);
        }

        /* ── Share Buttons ── */
        .share-section {
            padding: 0.75rem 1.75rem;
            border-top: 1px solid var(--border);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .share-label {
            font-size: 0.7rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--text-muted);
            margin-right: 0.25rem;
        }

        .share-btn {
            width: 32px; height: 32px;
            border-radius: 50%;
            border: 1px solid var(--border);
            background: var(--bg);
            color: var(--text-muted);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 0.85rem;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
        }

        .share-btn:hover {
            background: var(--text);
            color: var(--bg);
            border-color: var(--text);
            transform: scale(1.1);
        }

        /* ── Try Example ── */
        .try-example {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--text-muted);
            cursor: pointer;
            margin-top: 0.75rem;
            transition: var(--transition);
            background: none;
            border: none;
            font-family: inherit;
            padding: 0;
        }

        .try-example:hover {
            color: var(--brand-primary);
        }

        .try-example i {
            font-size: 0.7rem;
            transition: transform 0.2s;
        }

        .try-example:hover i {
            transform: translateX(3px);
        }

        /* ── Usage Counter Badge ── */
        .usage-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: var(--bg-secondary);
            border: 1px solid var(--border);
            border-radius: var(--radius-pill);
            padding: 0.4rem 1rem;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--text-muted);
            margin-top: 1.25rem;
        }

        .usage-badge i {
            color: var(--brand-primary);
            font-size: 0.75rem;
        }

        .usage-badge strong {
            color: var(--text);
            font-weight: 800;
        }

        /* ── FAQ Accordion ── */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }

        .faq-item {
            background: var(--bg-secondary);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: var(--text-muted);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1rem 1.25rem;
            cursor: pointer;
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            font-family: inherit;
            gap: 1rem;
        }

        .faq-question i {
            font-size: 0.7rem;
            color: var(--text-muted);
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }

        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
        }

        .faq-item.open .faq-answer {
            max-height: 200px;
        }

        .faq-answer-inner {
            padding: 0 1.25rem 1rem;
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* ── Comparison Table ── */
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            background: var(--bg-secondary);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            font-size: 0.9rem;
        }

        .comparison-table thead {
            background: var(--bg-tertiary);
        }

        .comparison-table th {
            padding: 0.85rem 1rem;
            font-weight: 700;
            font-size: 0.75rem;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--text-muted);
            text-align: left;
            border-bottom: 1px solid var(--border);
        }

        .comparison-table td {
            padding: 0.85rem 1rem;
            border-bottom: 1px solid var(--border);
            color: var(--text);
            font-weight: 500;
        }

        .comparison-table tr:last-child td {
            border-bottom: none;
        }

        .comparison-table tbody tr {
            transition: background 0.2s;
        }

        .comparison-table tbody tr:hover {
            background: var(--bg-tertiary);
        }

        .comparison-table .check {
            color: var(--brand-primary);
            font-weight: 700;
        }

        .comparison-table .cross {
            color: var(--text-muted);
            opacity: 0.5;
        }

        .comparison-table .highlight-col {
            background: rgba(99, 102, 241, 0.04);
        }

        [data-theme="dark"] .comparison-table .highlight-col {
            background: rgba(129, 140, 248, 0.06);
        }

        /* ── Showcase Grid ── */
        .showcase-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 1rem;
        }

        .showcase-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 1.25rem;
            transition: var(--transition);
            cursor: pointer;
            text-decoration: none;
            display: block;
        }

        .showcase-card:hover {
            border-color: var(--brand-primary);
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }

        .showcase-card-category {
            font-size: 0.65rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.1em;
            color: var(--brand-primary);
            margin-bottom: 0.5rem;
        }

        .showcase-card h4 {
            font-size: 0.95rem;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 0.35rem;
            line-height: 1.3;
        }

        .showcase-card p {
            font-size: 0.8rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        .showcase-card .showcase-meta {
            margin-top: 0.75rem;
            display: flex;
            gap: 0.75rem;
            font-size: 0.75rem;
            color: var(--text-muted);
            font-weight: 600;
        }

        .showcase-card .showcase-meta i {
            margin-right: 0.25rem;
            font-size: 0.65rem;
        }

        .section-divider {
            border: none;
            height: 1px;
            background: var(--border);
            margin: 4rem 0;
            position: relative;
        }
        
        .section-divider::after {
            content: '';
            position: absolute;
            top: -3px; left: 50%;
            transform: translateX(-50%);
            width: 40px; height: 7px;
            background: var(--bg-tertiary);
            border: 1px solid var(--border);
            border-radius: 10px;
        }

        /* ── Info sections ── */
        .section-label {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 800;
            letter-spacing: 0.15em;
            text-transform: uppercase;
            color: var(--brand-secondary);
            margin-bottom: 0.75rem;
            border-bottom: 2px solid var(--brand-secondary);
            padding-bottom: 0.2rem;
        }

        .section-title {
            font-size: 1.75rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            color: var(--text);
            margin-bottom: 1rem;
        }

        .section-text {
            color: var(--text-muted);
            font-size: 1.05rem;
            line-height: 1.6;
            margin-bottom: 2rem;
            max-width: 650px;
        }

        /* ── Extension card ── */
        .ext-card {
            background: var(--bg-secondary);
            border: 2px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 2.5rem;
            margin-bottom: 2rem;
            display: flex;
            align-items: center;
            gap: 2.5rem;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .ext-card::after {
            content: '\f268';
            font-family: 'Font Awesome 6 Brands';
            position: absolute;
            right: -20px;
            bottom: -30px;
            font-size: 12rem;
            color: var(--text);
            opacity: 0.02;
            z-index: 0;
            transition: transform 0.5s ease;
        }

        .ext-card:hover {
            border-color: var(--text);
            box-shadow: var(--shadow-md);
        }

        .ext-card:hover::after {
            transform: scale(1.1) rotate(-10deg);
            opacity: 0.04;
        }

        .ext-icon {
            width: 72px;
            height: 72px;
            border-radius: 50%;
            background: var(--text);
            color: var(--bg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2rem;
            flex-shrink: 0;
            z-index: 1;
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
            animation: floatingIcon 4s ease-in-out infinite alternate;
        }

        [data-theme="dark"] .ext-icon {
            background: var(--brand-secondary);
            color: #fff;
            box-shadow: 0 8px 20px rgba(56, 189, 248, 0.2);
        }

        .ext-content {
            z-index: 1;
            flex: 1;
        }

        .ext-content h3 {
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 0.5rem;
        }

        .ext-content p {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-bottom: 1.25rem;
        }

        .ext-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem;
            margin-bottom: 1.5rem;
        }

        .badge {
            font-size: 0.8rem;
            font-weight: 600;
            background: var(--bg-tertiary);
            border: 1px solid var(--border);
            border-radius: var(--radius-pill);
            padding: 0.35rem 0.85rem;
            color: var(--text);
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            transition: var(--transition);
        }
        
        .badge:hover {
            background: var(--text);
            color: var(--bg);
            border-color: var(--text);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: transparent;
            color: var(--text);
            border: 2px solid var(--text);
            border-radius: var(--radius-pill);
            font-family: inherit;
            font-size: 0.95rem;
            font-weight: 700;
            padding: 0.75rem 1.5rem;
            cursor: pointer;
            text-decoration: none;
            transition: var(--transition-bounce);
        }

        .btn-outline:hover {
            background: var(--text);
            color: var(--bg);
            transform: translateY(-2px);
            box-shadow: 0 8px 15px rgba(0,0,0,0.1);
        }

        /* ── Feature grid ── */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
            gap: 1.25rem;
            margin-top: 1.5rem;
        }

        .feature-item {
            background: var(--bg-secondary);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 1.75rem;
            transition: var(--transition-bounce);
            position: relative;
            overflow: hidden;
            z-index: 1;
        }

        .feature-item::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0; bottom: 0;
            background: var(--bg-tertiary);
            transform: scaleY(0);
            transform-origin: bottom;
            transition: transform 0.4s cubic-bezier(0.25, 1, 0.5, 1);
            z-index: -1;
        }

        .feature-item:hover {
            border-color: var(--border-strong);
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
        }

        .feature-item:hover::before {
            transform: scaleY(1);
        }

        .feature-item i {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px; height: 44px;
            border-radius: 8px;
            background: var(--bg-tertiary);
            font-size: 1.25rem;
            color: var(--text);
            margin-bottom: 1.25rem;
            transition: var(--transition);
            border: 1px solid var(--border);
        }

        .feature-item:hover i {
            background: var(--brand-primary);
            color: #ffffff;
            border-color: var(--brand-primary);
            transform: scale(1.1) rotate(5deg);
        }

        .feature-item h4 {
            font-size: 1.05rem;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 0.5rem;
        }

        .feature-item p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* ── Steps ── */
        .steps-wrapper {
            position: relative;
            padding: 2rem 0;
        }
        
        /* Connecting line */
        .steps-wrapper::before {
            content: '';
            position: absolute;
            top: 50%; width: 100%; height: 2px;
            background: var(--border);
            z-index: 0;
            display: none;
        }
        @media (min-width: 768px) { .steps-wrapper::before { display: block; } }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 2rem;
            position: relative;
            z-index: 1;
        }

        .step-item {
            background: var(--bg);
            padding: 1rem;
            text-align: center;
            transition: var(--transition-bounce);
        }
        
        .step-item:hover {
            transform: translateY(-8px);
        }

        .step-number {
            width: 50px;
            height: 50px;
            background: var(--bg-secondary);
            color: var(--text);
            border: 2px solid var(--text);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 900;
            font-size: 1.1rem;
            margin: 0 auto 1.25rem;
            transition: var(--transition);
            box-shadow: 0 0 0 4px var(--bg);
        }
        
        .step-item:hover .step-number {
            background: var(--text);
            color: var(--bg);
            box-shadow: 0 0 0 6px rgba(0,0,0,0.05);
        }
        
        [data-theme="dark"] .step-item:hover .step-number {
            box-shadow: 0 0 0 6px rgba(255,255,255,0.05);
        }

        .step-item h4 {
            font-size: 1.1rem;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 0.5rem;
        }

        .step-item p {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* ── Footer ── */
        .footer {
            background: var(--bg-secondary);
            padding: 2rem;
            text-align: center;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-muted);
            border-top: 1px solid var(--border);
            margin-top: auto;
        }

        .footer a {
            color: var(--text);
            text-decoration: none;
            font-weight: 700;
            position: relative;
        }
        
        .footer a::after {
            content: '';
            position: absolute;
            width: 100%;
            transform: scaleX(0);
            height: 2px;
            bottom: -2px;
            left: 0;
            background-color: var(--brand-tertiary); /* Rose pop */
            transform-origin: bottom right;
            transition: transform 0.3s ease-out;
        }
        
        .footer a:hover::after {
            transform: scaleX(1);
            transform-origin: bottom left;
        }

        /* ── Responsive ── */

        /* Tablet and below (≤ 768px) */
        @media (max-width: 768px) {
            /* Navbar */
            .navbar { padding: 0 1rem; }
            .navbar-logo-text { font-size: 1rem; }

            /* Main content */
            .main { padding: 2rem 1rem; }

            /* Hero */
            .hero { margin-bottom: 2.5rem; }

            /* Form card */
            .form-card { padding: 1.75rem; }
            .form-actions { flex-direction: column-reverse; align-items: stretch; gap: 1rem; }
            .btn-primary { justify-content: center; width: 100%; }
            .btn-outline { justify-content: center; }
            .advanced-grid-inner { grid-template-columns: 1fr 1fr; }

            /* Extension card */
            .ext-card { flex-direction: column; align-items: flex-start; gap: 1.5rem; padding: 1.75rem; }
            .ext-card::after { display: none; }
            .ext-icon { width: 56px; height: 56px; font-size: 1.5rem; }

            /* Feature grid */
            .feature-grid { grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 1rem; }

            /* Steps */
            .steps-grid { grid-template-columns: 1fr 1fr; gap: 1.5rem; }

            /* Results */
            .result-header { padding: 1.25rem; }
            .result-header-title { font-size: 1rem; }
            .stat-card { padding: 1rem 1.25rem; }
            .speed-section { padding: 1rem 1.25rem; }
            .speed-grid { grid-template-columns: repeat(auto-fit, minmax(100px, 1fr)); }
        }

        /* Mobile (≤ 480px) */
        @media (max-width: 480px) {
            /* Navbar */
            .navbar-logo-text span { display: none; }

            /* Hero */
            .hero h1 { font-size: 1.75rem; }
            .hero p { font-size: 0.95rem; }
            .hero-tag { font-size: 0.7rem; }

            /* Form */
            .form-card { padding: 1.25rem; border-radius: var(--radius-md); }
            .form-textarea { min-height: 120px; font-size: 0.9rem; }
            .advanced-grid-inner { grid-template-columns: 1fr; }

            /* Extension card */
            .ext-content h3 { font-size: 1.1rem; }
            .ext-badges { gap: 0.4rem; }
            .badge { font-size: 0.75rem; padding: 0.3rem 0.7rem; }

            /* Feature grid */
            .feature-grid { grid-template-columns: 1fr; }
            .feature-item { padding: 1.25rem; }

            /* Steps */
            .steps-grid { grid-template-columns: 1fr; gap: 1.25rem; }
            .steps-wrapper::before { display: none !important; }

            /* Results */
            .stat-grid { grid-template-columns: 1fr 1fr; }
            .stat-value { font-size: 0.9rem; }
            .speed-grid { grid-template-columns: 1fr 1fr; }
            .result-meta-tag { font-size: 0.7rem; }
            .result-notice { padding: 0.5rem 1.25rem; font-size: 0.75rem; }

            /* Section headers */
            .section-title { font-size: 1.35rem; }

            /* Footer */
            .footer { padding: 1.5rem 1rem; font-size: 0.8rem; }
        }

        /* Large desktop (≥ 1200px) */
        @media (min-width: 1200px) {
            .main { max-width: 980px; }
            .feature-grid { grid-template-columns: repeat(3, 1fr); }
        }
        
        /* ── SVG Background Pattern ── */
        .bg-pattern {
            position: fixed;
            top: 0; left: 0; right: 0; bottom: 0;
            background-image: radial-gradient(var(--border) 1px, transparent 1px);
            background-size: 32px 32px;
            opacity: 0.4;
            z-index: -1;
            pointer-events: none;
        }