/* Shared site chrome — header, footer, settings */
html { scroll-behavior: smooth; }

/* Site logo */
        .site-logo {
            font-family: "Clash Display", sans-serif;
            font-weight: 700;
            font-size: 1.25rem;
            letter-spacing: -0.02em;
            color: #e5e1e7;
            text-decoration: none;
            display: inline-flex;
            align-items: baseline;
            line-height: 1;
            flex-shrink: 0;
        }

        .site-logo-main {
            color: #e5e1e7;
        }

        .site-logo-ai {
            color: #00c8ff;
            transition: color 0.35s ease, text-shadow 0.35s ease;
        }

        .site-logo:hover .site-logo-ai {
            animation: logo-ai-colors 2.4s ease-in-out infinite;
        }

        @keyframes logo-ai-colors {
            0% { color: #00c8ff; text-shadow: 0 0 10px rgba(0, 200, 255, 0.55); }
            25% { color: #00e479; text-shadow: 0 0 10px rgba(0, 228, 121, 0.55); }
            50% { color: #99deff; text-shadow: 0 0 10px rgba(153, 222, 255, 0.5); }
            75% { color: #ffb4ab; text-shadow: 0 0 10px rgba(255, 180, 171, 0.45); }
            100% { color: #00c8ff; text-shadow: 0 0 10px rgba(0, 200, 255, 0.55); }
        }

/* Site header & nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            width: 100%;
            background: rgba(19, 19, 23, 0.72);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
            transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
        }

        .site-header.is-scrolled {
            background: rgba(13, 13, 20, 0.92);
            border-bottom-color: rgba(0, 200, 255, 0.12);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
        }

        .site-nav-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1.5rem;
            width: 100%;
            max-width: 1440px;
            margin: 0 auto;
            padding: 1rem 24px;
        }

        .site-nav-menu-wrap {
            display: none;
            position: relative;
        }

        @media (min-width: 1024px) {
            .site-nav-menu-wrap {
                display: block;
            }
        }

        .site-nav-menu {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .site-nav-link {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-family: "JetBrains Mono", monospace;
            font-size: 13px;
            letter-spacing: 0.12em;
            text-transform: uppercase;
            text-decoration: none;
            color: #6b7280;
            padding: 0.5625rem 0.875rem;
            border: 1px solid transparent;
            border-radius: 0.25rem;
            transition: color 0.45s cubic-bezier(0.22, 1, 0.36, 1),
                        border-color 0.45s cubic-bezier(0.22, 1, 0.36, 1),
                        background 0.45s cubic-bezier(0.22, 1, 0.36, 1);
            position: relative;
        }

        .site-nav-link:hover {
            color: #99deff;
            border-color: rgba(0, 200, 255, 0.12);
            background: rgba(0, 200, 255, 0.04);
        }

        .site-nav-link.is-active {
            color: #00c8ff;
            border-color: rgba(0, 200, 255, 0.22);
            background: rgba(0, 200, 255, 0.06);
        }

        .site-nav-indicator {
            position: absolute;
            bottom: 0;
            left: 0;
            height: 2px;
            width: 0;
            background: #00c8ff;
            box-shadow: 0 0 10px rgba(0, 200, 255, 0.75);
            border-radius: 1px;
            pointer-events: none;
            opacity: 0;
            transition: left 0.5s cubic-bezier(0.22, 1, 0.36, 1),
                        width 0.5s cubic-bezier(0.22, 1, 0.36, 1),
                        opacity 0.35s ease;
        }

        .site-nav-indicator.is-visible {
            opacity: 1;
        }

        .site-nav-num {
            font-size: 10px;
            color: rgba(0, 200, 255, 0.45);
            letter-spacing: 0.1em;
            transition: color 0.45s cubic-bezier(0.22, 1, 0.36, 1);
        }

        .site-nav-link.is-active .site-nav-num {
            color: #00c8ff;
        }

        .site-nav-cta {
            display: none;
            font-family: "JetBrains Mono", monospace;
            font-size: 13px;
            font-weight: 400;
            letter-spacing: 0.12em;
            text-transform: uppercase;
            color: #6b7280;
            background: transparent;
            border: 1px solid transparent;
            padding: 0.5625rem 0.875rem;
            border-radius: 0.25rem;
            text-decoration: none;
            white-space: nowrap;
            transition: color 0.45s cubic-bezier(0.22, 1, 0.36, 1),
                        border-color 0.45s cubic-bezier(0.22, 1, 0.36, 1),
                        background 0.45s cubic-bezier(0.22, 1, 0.36, 1);
            cursor: pointer;
        }

        @media (min-width: 1024px) {
            .site-nav-cta {
                display: inline-flex;
                align-items: center;
            }
        }

        .site-nav-cta:hover {
            color: #99deff;
            border-color: rgba(0, 200, 255, 0.12);
            background: rgba(0, 200, 255, 0.04);
            box-shadow: none;
        }

        .site-nav-toggle {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 2.5rem;
            height: 2.5rem;
            margin-left: auto;
            border: 1px solid rgba(255, 255, 255, 0.1);
            background: rgba(255, 255, 255, 0.03);
            color: #00c8ff;
            font-family: "JetBrains Mono", monospace;
            font-size: 14px;
            border-radius: 0.25rem;
            cursor: pointer;
            transition: border-color 0.2s ease, background 0.2s ease;
        }

        @media (min-width: 1024px) {
            .site-nav-toggle {
                display: none;
            }
        }

        .site-nav-toggle:hover {
            border-color: rgba(0, 200, 255, 0.35);
            background: rgba(0, 200, 255, 0.06);
        }

        .site-nav-mobile {
            display: none;
            flex-direction: column;
            gap: 0.25rem;
            padding: 0 24px 1rem;
            max-width: 1440px;
            margin: 0 auto;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            background: rgba(13, 13, 20, 0.95);
        }

        .site-nav-mobile.is-open {
            display: flex;
        }

        @media (min-width: 1024px) {
            .site-nav-mobile {
                display: none !important;
            }
        }

        .site-nav-mobile .site-nav-link {
            width: 100%;
            padding: 0.75rem 1rem;
        }

        .site-header-glow {
            position: absolute;
            bottom: 0;
            left: 0;
            height: 2px;
            width: 0%;
            background: linear-gradient(90deg, #00c8ff 0%, #00e479 50%, #99deff 100%);
            box-shadow: 0 0 14px rgba(0, 200, 255, 0.65), 0 2px 20px rgba(0, 228, 121, 0.25);
            pointer-events: none;
            transition: height 0.3s ease, box-shadow 0.3s ease;
        }

        .site-header.is-scrolled .site-header-glow {
            height: 3px;
            box-shadow: 0 0 20px rgba(0, 200, 255, 0.85), 0 0 36px rgba(0, 228, 121, 0.35);
        }

        body.is-loading {
            overflow: hidden;
        }

        /* Footer */
        .site-footer {
            position: relative;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }

        .site-footer-top {
            display: flex;
            flex-direction: column;
            gap: 2rem;
            padding-bottom: 2.5rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        @media (min-width: 768px) {
            .site-footer-top {
                flex-direction: row;
                justify-content: space-between;
                align-items: center;
            }
        }

        .site-footer-brand {
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }

        .site-footer-tag {
            font-family: "JetBrains Mono", monospace;
            font-size: 10px;
            letter-spacing: 0.2em;
            text-transform: uppercase;
            color: rgba(0, 200, 255, 0.35);
        }

        .site-footer-nav {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem 2rem;
        }

        .site-footer-nav a {
            font-family: "JetBrains Mono", monospace;
            font-size: 11px;
            letter-spacing: 0.14em;
            text-transform: uppercase;
            text-decoration: none;
            color: #6b7280;
            transition: color 0.25s ease;
        }

        .site-footer-nav a:hover {
            color: #00c8ff;
        }

/* Settings panel */
        .settings-overlay {
            position: fixed;
            inset: 0;
            z-index: 210;
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.3s ease, visibility 0.3s ease;
            pointer-events: none;
        }

        .settings-overlay.is-open {
            opacity: 1;
            visibility: visible;
            pointer-events: auto;
        }

        .settings-backdrop {
            position: absolute;
            inset: 0;
            background: rgba(6, 6, 9, 0.55);
            backdrop-filter: blur(4px);
            -webkit-backdrop-filter: blur(4px);
        }

        .settings-panel {
            position: fixed;
            z-index: 1;
            width: min(20rem, calc(100vw - 24px));
            overflow: hidden;
            background: rgba(13, 13, 20, 0.97);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid rgba(0, 200, 255, 0.25);
            padding: 1.5rem 1.75rem 1.75rem;
            transform: scale(0.92);
            transform-origin: top right;
            opacity: 0;
            transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.28s cubic-bezier(0.16, 1, 0.3, 1);
            box-shadow: 0 16px 48px rgba(0, 0, 0, 0.45), 0 0 24px rgba(0, 200, 255, 0.08);
        }

        .settings-overlay.is-open .settings-panel {
            transform: scale(1);
            opacity: 1;
        }

        .settings-close {
            position: absolute;
            top: 0.75rem;
            right: 0.75rem;
            width: 2rem;
            height: 2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: "JetBrains Mono", monospace;
            font-size: 1.125rem;
            color: #6b7280;
            border: 1px solid rgba(255, 255, 255, 0.1);
            background: rgba(255, 255, 255, 0.03);
            cursor: pointer;
            transition: color 0.2s ease, border-color 0.2s ease;
        }

        .settings-close:hover {
            color: #00c8ff;
            border-color: rgba(0, 200, 255, 0.4);
        }

        .settings-file-id {
            font-family: "JetBrains Mono", monospace;
            font-size: 11px;
            letter-spacing: 0.15em;
            color: #00c8ff;
            margin-bottom: 0.375rem;
        }

        .settings-title {
            font-family: "Clash Display", sans-serif;
            font-size: 1.25rem;
            font-weight: 600;
            color: #e5e1e7;
            margin-bottom: 1.25rem;
            padding-right: 2rem;
        }

        .settings-group {
            margin-bottom: 1.375rem;
        }

        .settings-group:last-child {
            margin-bottom: 0;
        }

        .settings-group-label {
            display: block;
            font-family: "JetBrains Mono", monospace;
            font-size: 10px;
            letter-spacing: 0.2em;
            text-transform: uppercase;
            color: #6b7280;
            margin-bottom: 0.625rem;
        }

        /* Language dropdown */
        .settings-lang {
            position: relative;
        }

        .settings-lang-trigger {
            width: 100%;
            display: flex;
            align-items: center;
            gap: 0.625rem;
            font-family: "Satoshi", sans-serif;
            font-size: 14px;
            font-weight: 500;
            color: #e5e1e7;
            padding: 0.75rem 1rem;
            border: 1px solid rgba(0, 200, 255, 0.2);
            border-top: 2px solid rgba(0, 200, 255, 0.4);
            background: rgba(0, 200, 255, 0.04);
            border-radius: 0.375rem;
            cursor: pointer;
            transition: border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
        }

        .settings-lang-trigger:hover,
        .settings-lang.is-open .settings-lang-trigger {
            border-color: rgba(0, 200, 255, 0.35);
            box-shadow: 0 0 16px rgba(0, 200, 255, 0.1);
        }

        .settings-lang-flag {
            font-size: 1.125rem;
            line-height: 1;
        }

        .settings-lang-label {
            flex: 1;
            text-align: left;
        }

        .settings-lang-chevron {
            font-family: "JetBrains Mono", monospace;
            font-size: 10px;
            color: #6b7280;
            transition: transform 0.2s ease;
        }

        .settings-lang.is-open .settings-lang-chevron {
            transform: rotate(180deg);
            color: #00c8ff;
        }

        .settings-lang-menu {
            position: absolute;
            top: calc(100% + 4px);
            left: 0;
            right: 0;
            list-style: none;
            margin: 0;
            padding: 0.25rem;
            background: rgba(13, 13, 20, 0.98);
            border: 1px solid rgba(0, 200, 255, 0.22);
            border-radius: 0.375rem;
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
            opacity: 0;
            visibility: hidden;
            transform: translateY(-6px);
            transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
            z-index: 5;
        }

        .settings-lang.is-open .settings-lang-menu {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .settings-lang-option {
            width: 100%;
            display: flex;
            align-items: center;
            gap: 0.625rem;
            font-family: "Satoshi", sans-serif;
            font-size: 14px;
            color: #bcc8d0;
            padding: 0.625rem 0.75rem;
            border: 1px solid transparent;
            border-radius: 0.25rem;
            background: transparent;
            cursor: pointer;
            transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
        }

        .settings-lang-option:hover {
            color: #99deff;
            background: rgba(0, 200, 255, 0.06);
            border-color: rgba(0, 200, 255, 0.12);
        }

        .settings-lang-option.is-active {
            color: #00c8ff;
            background: rgba(0, 200, 255, 0.08);
            border-color: rgba(0, 200, 255, 0.2);
        }

        /* Theme toggle */
        .settings-theme-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 0.75rem;
            padding: 0.625rem 0.875rem;
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 0.375rem;
            background: rgba(255, 255, 255, 0.02);
        }

        .settings-theme-label {
            font-family: "JetBrains Mono", monospace;
            font-size: 10px;
            letter-spacing: 0.1em;
            text-transform: uppercase;
            color: #6b7280;
            transition: color 0.25s ease;
            flex-shrink: 0;
        }

        .settings-theme-label.is-active {
            color: #00c8ff;
        }

        .settings-theme-switch {
            position: relative;
            display: inline-flex;
            cursor: pointer;
            flex-shrink: 0;
        }

        .settings-theme-switch input {
            position: absolute;
            opacity: 0;
            width: 0;
            height: 0;
        }

        .settings-theme-track {
            display: block;
            width: 3rem;
            height: 1.625rem;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 999px;
            transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
            position: relative;
        }

        .settings-theme-thumb {
            position: absolute;
            top: 2px;
            left: 2px;
            width: 1.25rem;
            height: 1.25rem;
            border-radius: 50%;
            background: #00c8ff;
            box-shadow: 0 0 10px rgba(0, 200, 255, 0.5);
            transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1), background 0.3s ease, box-shadow 0.3s ease;
        }

        .settings-theme-switch input:checked + .settings-theme-track {
            background: rgba(255, 200, 100, 0.15);
            border-color: rgba(255, 200, 100, 0.35);
            box-shadow: 0 0 14px rgba(255, 200, 100, 0.2);
        }

        .settings-theme-switch input:checked + .settings-theme-track .settings-theme-thumb {
            transform: translateX(1.375rem);
            background: #ffd080;
            box-shadow: 0 0 12px rgba(255, 200, 100, 0.55);
        }

        /* Light theme confirm */
        .settings-light-confirm {
            position: absolute;
            inset: 0;
            z-index: 10;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 1.5rem;
            background: rgba(6, 6, 9, 0.92);
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
            border-radius: inherit;
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.25s ease, visibility 0.25s ease;
        }

        .settings-light-confirm.is-visible {
            opacity: 1;
            visibility: visible;
        }

        .settings-light-confirm-code {
            font-family: "JetBrains Mono", monospace;
            font-size: 10px;
            letter-spacing: 0.18em;
            text-transform: uppercase;
            color: rgba(255, 180, 171, 0.85);
            margin-bottom: 0.75rem;
        }

        .settings-light-confirm-title {
            font-family: "Clash Display", sans-serif;
            font-size: 1.125rem;
            font-weight: 600;
            color: #e5e1e7;
            text-align: center;
            margin-bottom: 0.5rem;
        }

        .settings-light-confirm-sub {
            font-family: "Satoshi", sans-serif;
            font-style: italic;
            font-size: 13px;
            color: #6b7280;
            text-align: center;
            margin-bottom: 1.25rem;
        }

        .settings-light-confirm-actions {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
            width: 100%;
        }

        .settings-confirm-btn {
            font-family: "Satoshi", sans-serif;
            font-size: 12px;
            font-weight: 500;
            padding: 0.625rem 1rem;
            border-radius: 0.375rem;
            cursor: pointer;
            transition: box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease;
            border: 1px solid rgba(255, 255, 255, 0.12);
            background: rgba(255, 255, 255, 0.04);
            color: #bcc8d0;
        }

        .settings-confirm-btn--yes {
            color: #005068;
            background: #00c8ff;
            border-color: rgba(0, 200, 255, 0.45);
        }

        .settings-confirm-btn--yes:hover {
            box-shadow: 0 0 20px rgba(0, 200, 255, 0.35);
        }

        .settings-confirm-btn--no:hover {
            border-color: rgba(0, 200, 255, 0.3);
            color: #99deff;
        }

        .hud-corner {
            position: absolute;
            width: 16px;
            height: 16px;
            border: 2px solid #00c8ff;
            opacity: 0.15;
            transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            pointer-events: none;
        }

        .scanning-btn {
            position: relative;
            overflow: hidden;
        }

        .settings-mobile-open {
            margin-top: 0.5rem;
            text-align: left;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }

        .site-footer {
            background: #0e0e12;
        }