/* KoalaSync Design System - Privacy-Focused (No External Assets) */

:root {
    --bg: #0f172a;
    --card: #1e293b;
    --accent: #6366f1;
    --accent-glow: rgba(99, 102, 241, 0.3);
    --text: #f8fafc;
    --text-muted: #cbd5e1; /* Increased contrast for WCAG AA (6.28:1 contrast ratio) */
    --success: #22c55e;
    --glass: rgba(30, 41, 59, 0.4);
    --glass-border: rgba(255, 255, 255, 0.05);
}

.invite-banner {
    background: var(--accent);
    color: white;
    padding: 0.75rem 0;
    text-align: center;
    font-weight: 600;
    font-size: 0.9rem;
    position: relative;
    z-index: 2000;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.btn-banner {
    background: white;
    color: var(--accent);
    padding: 4px 12px;
    border-radius: 6px;
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 700;
    margin-left: 12px;
    cursor: pointer;
    border: none;
    transition: transform 0.2s;
}

.btn-banner:hover {
    transform: scale(1.05);
}

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

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: 6px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* --- Animated Background --- */
.bg-blobs {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    background: radial-gradient(circle at 50% 50%, #1e1b4b 0%, #0f172a 100%);
}

.blob {
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    filter: blur(80px);
    border-radius: 50%;
    opacity: 0.5;
    animation: move 25s infinite alternate ease-in-out;
}

.blob-1 { top: -100px; left: -100px; animation-delay: 0s; }
.blob-2 { bottom: -100px; right: -100px; animation-delay: -5s; background: radial-gradient(circle, rgba(139, 92, 246, 0.2) 0%, transparent 70%); }
.blob-3 { top: 40%; left: 30%; animation-duration: 35s; animation-delay: -10s; }

@keyframes move {
    0% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(100px, 100px) scale(1.2); }
    66% { transform: translate(-50px, 200px) scale(0.8); }
    100% { transform: translate(0, 0) scale(1); }
}

/* --- Layout --- */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    padding: 6rem 0;
}

/* Content-visibility for offscreen sections to improve INP */
.use-cases-section,
#features,
#self-hosting,
.comparison-section {
    content-visibility: auto;
    contain-intrinsic-size: auto 1400px;
}

/* --- Navigation --- */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: var(--glass);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    padding: 1rem 0;
}

.nav-content {
    display: flex;
    align-items: center;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 800;
    font-size: 1.5rem;
    letter-spacing: -0.5px;
}

.logo-area picture {
    display: contents;
}

.logo-area img {
    height: 64px;
    width: 64px;
    object-fit: contain;
    border-radius: 8px;
    margin: -4px 0;
}

.nav-ext-status {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 8px;
    background: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #10b981;
    border-radius: 12px;
    font-size: 0.55rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: 0 0 10px rgba(16, 185, 129, 0.1);
    animation: fade-in 0.4s ease-out;
    margin-left: 0.2rem;
}

@keyframes fade-in {
    from { opacity: 0; transform: translateY(-5px); }
    to { opacity: 1; transform: translateY(0); }
}

.nav-links {
    display: flex;
    gap: 2rem;
    margin-left: auto;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--accent);
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: 2rem;
    flex-shrink: 0;
}

/* --- Hero Section --- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 8rem;
    padding-bottom: 4rem;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    align-items: center;
    gap: 4rem;
    text-align: left;
    width: 100%;
}

.hero-text h1 {
    font-size: 4.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    background: linear-gradient(to bottom, #fff 40%, #6366f1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-text p, .hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    max-width: 600px;
    font-weight: 400;
    line-height: 1.6;
}
.hero-mascot-container {
    display: block;
    margin-bottom: -0.5rem;
    margin-left: 2.2rem;
}

.hero-lookdown-mascot {
    display: block;
    width: 90px;
    height: auto;
}

@media (max-width: 768px) {
    .hero-mascot-container {
        margin-left: 0;
        display: flex;
        justify-content: center;
    }
}

.cta-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    padding: 0.85rem 1.75rem;
    border-radius: 12px;
    font-weight: 600;
    text-decoration: none;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), background-color 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1), color 0.3s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1), border-color 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
}
.btn-primary {
    background: #5b5de8;
    color: white;
    box-shadow: 0 10px 15px -3px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 25px -5px var(--accent-glow);
}

.btn-firefox {
    background: #e66000;
    color: white;
    box-shadow: 0 10px 15px -3px rgba(230, 96, 0, 0.3);
}

.btn-firefox:hover {
    background: #ff7300;
    transform: translateY(-2px);
    box-shadow: 0 20px 25px -5px rgba(230, 96, 0, 0.4);
}

.btn-secondary {
    background: var(--card);
    color: var(--text);
    border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
    background: #2d3748;
    transform: translateY(-2px);
}

.version-badge {
    display: inline-block;
    background: rgba(99, 102, 241, 0.1);
    color: var(--accent);
    padding: 0.4rem 1rem;
    border-radius: 99px;
    font-size: 0.8rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(99, 102, 241, 0.3);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
}

.version-badge:hover {
    background: rgba(99, 102, 241, 0.2);
    box-shadow: 0 0 16px rgba(99, 102, 241, 0.3);
    transform: translateY(-1px);
}

/* --- Interactive CSS Extension Mockup --- */
.hero-mockup-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
}

.extension-mockup {
    width: 320px;
    height: 520px;
    background: #0f172a;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4), 0 0 20px rgba(99, 102, 241, 0.15);
    display: flex;
    flex-direction: column;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    overflow: hidden;
    position: relative;
    user-select: none;
    padding: 16px;
    padding-bottom: 0;
    box-sizing: border-box;
}

.mock-header-row {
    display: flex;
    align-items: center;
    margin-bottom: 16px;
    flex-shrink: 0;
}

.mock-header-title {
    font-size: 18px;
    margin: 0;
    color: var(--accent);
    letter-spacing: 1px;
    text-transform: uppercase;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 800;
}

.mock-header-title picture {
    display: contents;
}

.mock-header-title img {
    width: 28px;
    height: 28px;
    object-fit: contain;
    border-radius: 6px;
}

.mock-version-link {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 10px;
    color: var(--text-muted);
    text-decoration: none;
    opacity: 0.5;
    transition: opacity 0.2s, color 0.2s;
    cursor: pointer;
}

.mock-version-link:hover {
    opacity: 1;
    color: var(--accent);
}

.mock-tabs {
    display: flex;
    gap: 4px;
    background: #1e293b;
    padding: 4px;
    border-radius: 12px;
    margin-bottom: 20px;
    flex-shrink: 0;
}

.mock-tab {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 8px 4px;
    cursor: pointer;
    border-radius: 8px;
    transition: color 0.2s, background-color 0.2s;
    text-align: center;
}

.mock-tab:hover {
    color: var(--text);
}

.mock-tab.active {
    background: var(--accent);
    color: white;
}

.mock-body {
    flex: 1;
    overflow-y: auto;
    padding: 0;
    padding-bottom: 16px;
    display: flex;
    flex-direction: column;
    font-size: 0.8rem;
    scrollbar-width: none; /* Firefox */
}

.mock-body::-webkit-scrollbar {
    display: none; /* Chrome, Safari, Opera */
}

.mock-screen {
    display: none;
    flex-direction: column;
    gap: 12px;
}

.mock-screen.active {
    display: flex;
}

/* Common Mockup Components */
.mock-card {
    background: #1e293b;
    border: 1px solid #334155;
    border-radius: 8px;
    padding: 12px;
}

.mock-label {
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.4rem;
}

.mock-section-label {
    display: block;
    font-size: 11px;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 4px;
    font-weight: 700;
}

.mock-input {
    background: #1e293b;
    border: 1px solid #334155;
    border-radius: 8px;
    color: white;
    padding: 8px 10px;
    font-size: 0.75rem;
    width: 100%;
    outline: none;
}

.mock-btn {
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 6px;
    padding: 0.5rem;
    font-weight: 600;
    font-size: 0.75rem;
    cursor: pointer;
    transition: background 0.2s;
    text-align: center;
}

.mock-btn:hover {
    background: #4f46e5;
}

/* Room Tab Details */
.mock-joined-room {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: 8px;
    padding: 0.6rem 0.75rem;
}

.mock-room-name {
    font-weight: 700;
    color: var(--accent);
    font-size: 0.85rem;
}

.mock-server-badge {
    background: rgba(99, 102, 241, 0.2);
    color: var(--accent);
    font-size: 0.6rem;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 4px;
}

.mock-invite-box {
    display: flex;
    gap: 0.4rem;
}

.mock-invite-box input {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.mock-peer-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.mock-peer-item {
    display: flex;
    flex-direction: column;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.03);
    border-radius: 8px;
    padding: 0.5rem 0.6rem;
}

.mock-peer-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.25rem;
}

.mock-peer-name {
    font-weight: 700;
    color: var(--text);
}

.mock-peer-meta {
    font-size: 0.65rem;
    color: var(--text-muted);
}

.mock-peer-tab {
    font-size: 0.7rem;
    color: var(--accent);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.mock-peer-status {
    font-size: 0.65rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

/* Sync Tab Details */
.mock-target-box {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    background: rgba(234, 179, 8, 0.1);
    border: 1px solid rgba(234, 179, 8, 0.2);
    color: #facc15;
    padding: 0.5rem 0.6rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.7rem;
}

.mock-ctrl-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
}

.mock-btn-play { background: #22c55e; }
.mock-btn-play:hover { background: #16a34a; }
.mock-btn-pause { background: #ef4444; }
.mock-btn-pause:hover { background: #dc2626; }
.mock-btn-force { background: var(--accent); grid-column: span 2; }

.mock-status-display {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.mock-status-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.2);
    color: #22c55e;
    padding: 2px 8px;
    border-radius: 99px;
    font-size: 0.65rem;
    font-weight: 700;
}

.mock-log-item {
    font-size: 0.7rem;
    color: var(--text-muted);
    border-left: 2px solid var(--accent);
    padding-left: 0.4rem;
    margin-top: 0.4rem;
}

/* Settings Tab Details */
.mock-settings-row {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    margin-bottom: 0.6rem;
}

.mock-settings-row input[type="checkbox"] {
    margin-top: 0.2rem;
    cursor: pointer;
}

.mock-settings-row label {
    cursor: pointer;
    font-weight: 600;
}

.mock-settings-row p {
    font-size: 0.65rem;
    color: var(--text-muted);
    margin-top: 0.1rem;
}

/* Mock Toggle Switch Details */
.mock-toggle-switch {
    position: relative;
    display: inline-block;
    width: 36px;
    height: 20px;
    flex-shrink: 0;
}

.mock-toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.mock-slider {
    position: absolute;
    cursor: default;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: #334155;
    transition: .3s;
    border-radius: 20px;
}

.mock-slider:before {
    position: absolute;
    content: "";
    height: 14px;
    width: 14px;
    left: 3px;
    bottom: 3px;
    background-color: #94a3b8;
    transition: .3s;
    border-radius: 50%;
}

input:checked + .mock-slider {
    background-color: var(--accent);
}

input:checked + .mock-slider:before {
    transform: translateX(16px);
    background-color: white;
}

/* Dev Tab Details */
.mock-diagnostic-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.4rem;
}

.mock-diag-box {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: 6px;
    padding: 0.4rem;
}

.mock-diag-box .diag-val {
    font-family: monospace;
    font-weight: 700;
    color: var(--accent);
    font-size: 0.75rem;
}

/* --- Features --- */
/* Bento Grid Layout Configuration */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-top: 4rem;
}

.feature-card {
    background: rgba(30, 41, 59, 0.45);
    backdrop-filter: blur(16px) saturate(120%);
    -webkit-backdrop-filter: blur(16px) saturate(120%);
    padding: 2.5rem;
    border-radius: 24px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1), border-color 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    border-radius: 24px;
    padding: 1px;
    background: linear-gradient(to bottom right, rgba(255, 255, 255, 0.12), transparent);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(99, 102, 241, 0.2);
    border-color: rgba(99, 102, 241, 0.3);
}

.feature-card:hover::before {
    background: linear-gradient(to bottom right, rgba(99, 102, 241, 0.3), transparent);
}

/* Feature Icon with Inline SVG Wrapper */
.feature-icon-svg {
    display: flex;
    flex-shrink: 0;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: rgba(99, 102, 241, 0.12);
    color: var(--accent);
    border-radius: 12px;
    margin-right: 14px;
    transition: background 0.3s ease, color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
}

.feature-card:hover .feature-icon-svg {
    background: var(--accent);
    color: white;
    box-shadow: 0 0 15px var(--accent-glow);
    transform: scale(1.05);
}

.bento-icon {
    width: 22px;
    height: 22px;
    display: block;
    flex-shrink: 0;
}

.feature-card h3 {
    margin-bottom: 1rem;
    font-size: 1.25rem;
    font-weight: 700;
    display: flex;
    align-items: center;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Bento Asymmetric Spanning */
.feature-card.bento-large {
    grid-column: span 2;
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.45) 0%, rgba(99, 102, 241, 0.08) 100%);
    padding: 3rem 3.5rem;
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
    align-items: center;
}

.feature-card.bento-large h3 {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1rem;
    margin-bottom: 0;
    font-size: 1.25rem;
}

.feature-card.bento-large .feature-icon,
.feature-card.bento-large .feature-icon-svg {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    margin-right: 0;
    flex-shrink: 0;
}

.feature-card.bento-large .bento-icon {
    width: 24px;
    height: 24px;
}

.feature-card.bento-large p {
    font-size: 1rem;
    line-height: 1.7;
    margin: 0;
}

.feature-card.bento-large::after {
    content: '';
    position: absolute;
    top: 0;
    left: 2.5rem;
    right: 2.5rem;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.4), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.feature-card.bento-large:hover::after {
    opacity: 1;
}

@media (max-width: 900px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.25rem;
    }
    .feature-card.bento-large {
        grid-column: span 2;
        padding: 2.5rem;
        gap: 2rem;
    }
    .feature-card.bento-large h3 {
        font-size: 1.15rem;
    }
}

@media (max-width: 600px) {
    .features-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    .feature-card.bento-large {
        grid-column: span 1;
        display: flex;
        flex-direction: column;
        padding: 1.75rem;
        gap: 1rem;
    }
    .feature-card.bento-large h3 {
        flex-direction: row;
        align-items: center;
        text-align: left;
        gap: 0.75rem;
        margin-bottom: 0;
        font-size: 1.15rem;
    }
    .feature-card.bento-large .feature-icon,
    .feature-card.bento-large .feature-icon-svg {
        width: 40px;
        height: 40px;
        border-radius: 10px;
        margin-right: 0;
    }
    .feature-card.bento-large .bento-icon {
        width: 18px;
        height: 18px;
    }
    .feature-card.bento-large p {
        font-size: 0.9rem;
        line-height: 1.6;
    }
    .feature-card.bento-large::after {
        display: none;
    }
    .feature-card {
        padding: 1.75rem;
    }
    .feature-card h3 {
        font-size: 1.1rem;
    }
    .feature-icon-svg {
        width: 40px;
        height: 40px;
        border-radius: 10px;
        margin-right: 12px;
    }
    .bento-icon {
        width: 18px;
        height: 18px;
    }
}

/* --- How it works --- */
.steps {
    display: flex;
    flex-direction: column;
    gap: 6rem;
}

.step {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 6rem;
    align-items: center;
}

.step:nth-child(even) .step-text {
    order: 2;
}

.step-num {
    font-size: 4rem;
    font-weight: 800;
    color: rgba(99, 102, 241, 0.15);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.step-text h3 {
    font-size: 1.85rem;
    margin-bottom: 1rem;
    font-weight: 800;
}

.step-text p {
    color: var(--text-muted);
    font-size: 1.05rem;
    line-height: 1.6;
}

/* Custom CSS Mockups for step illustrations */
.step-illustration-1, .step-illustration-2, .step-illustration-3 {
    background: radial-gradient(circle at top left, #1e293b, #0f172a);
    height: 280px; /* Slightly taller for more detail and breathing room */
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.05);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.4s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.step-illustration-1:hover, .step-illustration-2:hover, .step-illustration-3:hover {
    transform: translateY(-6px) scale(1.02);
    border-color: rgba(99, 102, 241, 0.25);
    box-shadow: 0 25px 50px rgba(99, 102, 241, 0.15), inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

/* ==========================================================================
   Step 1 Illustration: Browser & Installed Success Popup
   ========================================================================== */
.illus-browser-container {
    width: 90%;
    height: 80%;
    background: #090d16;
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
}

.illus-browser-header {
    background: #131924;
    padding: 0.6rem 0.8rem;
    display: flex;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.illus-browser-dots {
    display: flex;
    gap: 6px;
    margin-right: 1.5rem;
}

.illus-browser-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    opacity: 0.6;
}
.illus-browser-dot:nth-child(1) { background: #ef4444; }
.illus-browser-dot:nth-child(2) { background: #fbbf24; }
.illus-browser-dot:nth-child(3) { background: #22c55e; }

.illus-browser-address-bar {
    background: #090d16;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 6px;
    color: var(--text-muted);
    font-size: 0.68rem;
    padding: 3px 12px;
    flex-grow: 1;
    max-width: 60%;
    text-align: center;
    font-family: monospace;
    letter-spacing: 0.2px;
}

.illus-browser-address-bar .url-protocol {
    color: #22c55e;
    font-weight: 600;
}

.illus-browser-toolbar {
    display: flex;
    margin-left: auto;
}

.illus-extension-btn {
    width: 22px;
    height: 22px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.3s, box-shadow 0.3s;
}

.illus-extension-btn.active {
    background: rgba(99, 102, 241, 0.2);
    border: 1px solid var(--accent);
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.4);
    animation: active-pulse 2s infinite alternate;
}

@keyframes active-pulse {
    0% { transform: scale(1); box-shadow: 0 0 5px rgba(99, 102, 241, 0.4); }
    100% { transform: scale(1.08); box-shadow: 0 0 12px rgba(99, 102, 241, 0.7); }
}

.illus-browser-content {
    flex-grow: 1;
    padding: 1rem;
    position: relative;
    display: flex;
    align-items: flex-start;
}

.illus-store-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: 12px;
    padding: 0.8rem;
    width: 65%;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.illus-store-card-header {
    display: flex;
    align-items: center;
    gap: 8px;
}

.illus-large-logo {
    width: 30px;
    height: 30px;
    object-fit: contain;
    border-radius: 6px;
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.2);
}

.illus-store-info {
    display: flex;
    flex-direction: column;
}

.illus-store-title {
    font-size: 0.88rem;
    font-weight: 800;
    color: var(--text);
    line-height: 1.1;
}

.illus-store-desc {
    font-size: 0.58rem;
    color: var(--text-muted);
    line-height: 1.2;
    margin-top: 2px;
}

.illus-store-buttons {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.illus-store-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 8px;
    border-radius: 8px;
    font-size: 0.58rem;
    font-weight: 700;
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.05);
    background: rgba(255, 255, 255, 0.03);
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    cursor: default;
    transition: opacity 0.2s, transform 0.2s;
}

.illus-store-btn img {
    width: 11px;
    height: 11px;
    display: block;
}

.illus-store-btn.chrome {
    border-color: rgba(99, 102, 241, 0.25);
    background: rgba(99, 102, 241, 0.08);
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.05);
}

.illus-store-btn.firefox {
    border-color: rgba(249, 115, 22, 0.25);
    background: rgba(249, 115, 22, 0.08);
    box-shadow: 0 0 10px rgba(249, 115, 22, 0.05);
}

.install-breathe {
    animation: install-breathe 2.5s ease-in-out infinite;
    z-index: 2;
    position: relative;
}

@keyframes install-breathe {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 0 15px rgba(99, 102, 241, 0.2);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 0 25px rgba(99, 102, 241, 0.5);
    }
}

.install-breathe.firefox,
.btn-firefox.install-breathe {
    animation-name: install-breathe-ff;
}

@keyframes install-breathe-ff {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 0 15px rgba(249, 115, 22, 0.2);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 0 25px rgba(249, 115, 22, 0.5);
    }
}

/* Glassmorphic Dropping Success Card */
.illus-extension-popup {
    position: absolute;
    top: 0.6rem;
    right: 0.6rem;
    width: 145px;
    background: rgba(30, 41, 59, 0.75);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 12px;
    padding: 0.6rem 0.8rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.1);
    animation: popup-float 4s ease-in-out infinite;
    z-index: 5;
}

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

.illus-extension-popup .popup-title {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 6px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding-bottom: 4px;
}

.illus-extension-popup .popup-title img {
    width: 12px;
    height: 12px;
}

.illus-extension-popup .popup-status {
    margin-bottom: 4px;
}

.status-badge-success {
    background: rgba(34, 197, 94, 0.12);
    color: #22c55e;
    font-size: 0.6rem;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 4px;
    border: 1px solid rgba(34, 197, 94, 0.2);
    display: inline-flex;
    align-items: center;
    gap: 3px;
    animation: status-glow 2s infinite alternate;
}

@keyframes status-glow {
    0% { box-shadow: 0 0 0 rgba(34, 197, 94, 0); }
    100% { box-shadow: 0 0 6px rgba(34, 197, 94, 0.3); }
}

.illus-extension-popup .popup-quick-start {
    font-size: 0.55rem;
    color: var(--text-muted);
    font-weight: 500;
    line-height: 1.2;
}


/* ==========================================================================
   Step 2 Illustration: Highly Realistic Extension Popup (Create Room View)
   ========================================================================== */
.illus-popup-card {
    width: 220px; /* Scaled up 16% for a bigger, much more detailed view */
    background: rgba(30, 41, 59, 0.75);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 16px;
    padding: 0.95rem; /* Slightly larger padding */
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.1);
    display: flex;
    flex-direction: column;
    gap: 0.75rem; /* Tighter vertical layout rhythm */
    animation: popup-float 4s ease-in-out infinite;
    animation-delay: -1s;
}

.illus-popup-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    padding-bottom: 8px;
}

.illus-popup-brand {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.82rem; /* Scaled up font */
    font-weight: 800;
    letter-spacing: -0.2px;
}

.illus-popup-version {
    font-size: 0.58rem;
    color: var(--text-muted);
}

.illus-popup-tabs {
    display: flex;
    gap: 4px;
    background: rgba(9, 13, 22, 0.4);
    padding: 3px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.03);
}

.illus-popup-tab {
    flex: 1;
    text-align: center;
    font-size: 0.62rem; /* Scaled up font */
    padding: 4px 0;
    border-radius: 6px;
    color: var(--text-muted);
    font-weight: 600;
}

.illus-popup-tab.active {
    background: var(--card);
    color: var(--accent);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.illus-popup-body {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    position: relative;
}

.illus-popup-btn {
    background: linear-gradient(135deg, var(--accent), #8b5cf6);
    border-radius: 8px;
    padding: 9px; /* Scaled up padding */
    color: white;
    font-weight: 700;
    font-size: 0.7rem; /* Scaled up font */
    text-align: center;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
    position: relative;
    overflow: hidden;
    cursor: default;
    animation: create-btn-pulse 2s infinite alternate;
}

@keyframes create-btn-pulse {
    0% { transform: scale(1); box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3); }
    100% { transform: scale(1.03); box-shadow: 0 6px 16px rgba(99, 102, 241, 0.5); }
}

.illus-btn-shine {
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
    transform: skewX(-20deg);
    animation: shimmer-sweep 3s infinite ease-in-out;
}

@keyframes shimmer-sweep {
    0% { left: -100%; }
    50%, 100% { left: 150%; }
}

.illus-collapsed-details {
    background: rgba(9, 13, 22, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    padding: 7px 12px; /* Scaled up padding */
    font-size: 0.56rem; /* Scaled up font */
    color: var(--text-muted);
    font-weight: 700;
    text-transform: uppercase;
    display: flex;
    align-items: center;
    gap: 6px;
    letter-spacing: 0.2px;
}

.details-arrow {
    font-size: 0.48rem;
    color: var(--text-muted);
    opacity: 0.7;
}

/* Floating Success Badge */
.illus-floating-success {
    position: absolute;
    bottom: -1.2rem;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(9, 13, 22, 0.9);
    border: 1px solid rgba(34, 197, 94, 0.3);
    border-radius: 20px;
    padding: 3px 10px;
    display: flex;
    align-items: center;
    gap: 4px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.4);
    animation: floating-success-fade 5s infinite;
    white-space: nowrap;
    z-index: 10;
}

@keyframes floating-success-fade {
    0%, 100%, 75% { opacity: 0; transform: translate(-50%, 5px) scale(0.9); }
    15%, 60% { opacity: 1; transform: translate(-50%, 0) scale(1); }
}

.illus-floating-success .success-icon {
    font-size: 0.65rem;
}

.illus-floating-success span[lang] {
    font-size: 0.58rem;
    color: #22c55e;
    font-weight: 700;
}


/* ==========================================================================
   Step 3 Illustration: Dual Screen Theater Sync Setup
   ========================================================================= */
.illus-sync-theater {
    width: 95%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    gap: 0.6rem;
}

.illus-player-card {
    width: 145px;
    background: rgba(15, 23, 42, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 6px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.4);
    display: flex;
    flex-direction: column;
    gap: 4px;
    position: relative;
    z-index: 2;
}

.illus-player-card.player-a {
    animation: popup-float 4s ease-in-out infinite;
    animation-delay: -2s;
}

.illus-player-card.player-b {
    animation: popup-float 4s ease-in-out infinite;
    animation-delay: -3s;
}

.player-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.55rem;
}

.player-user {
    font-weight: 700;
    color: var(--text);
}

.player-badge {
    font-size: 0.42rem;
    font-weight: 800;
    padding: 1px 3px;
    border-radius: 3px;
}

.player-badge.active {
    background: rgba(34, 197, 94, 0.15);
    color: #22c55e;
    border: 1px solid rgba(34, 197, 94, 0.25);
}

.player-video-canvas {
    height: 70px;
    border-radius: 8px;
    background: linear-gradient(135deg, #1e1b4b, #311042);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(255, 255, 255, 0.02);
}

.player-video-overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: radial-gradient(circle at center, rgba(139, 92, 246, 0.1) 0%, transparent 80%);
}

.player-play-pulse {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(99, 102, 241, 0.85);
    color: white;
    font-size: 0.65rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.5);
    z-index: 3;
    animation: play-pulse 2s infinite alternate;
}

@keyframes play-pulse {
    0% { transform: scale(1); box-shadow: 0 0 6px rgba(99, 102, 241, 0.4); }
    100% { transform: scale(1.15); box-shadow: 0 0 15px rgba(99, 102, 241, 0.8); }
}

.player-controls {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 2px 2px 0 2px;
}

.control-btn {
    font-size: 0.58rem;
    color: var(--accent);
}

.player-timeline {
    flex-grow: 1;
    height: 3px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    position: relative;
}

.timeline-fill {
    position: absolute;
    top: 0; left: 0;
    height: 100%;
    background: var(--accent);
    border-radius: 2px;
    width: 60%;
    animation: theater-grow 6s infinite linear;
}

.timeline-knob {
    position: absolute;
    top: -2px;
    left: 60%;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: white;
    box-shadow: 0 0 4px rgba(0,0,0,0.5);
    transform: translateX(-50%);
    animation: theater-knob-grow 6s infinite linear;
}

@keyframes theater-grow {
    0% { width: 0%; }
    100% { width: 100%; }
}

@keyframes theater-knob-grow {
    0% { left: 0%; }
    100% { left: 100%; }
}

.control-time {
    font-size: 0.5rem;
    color: var(--text-muted);
    font-family: monospace;
}

/* Glowing Connection Sync Bridge */
.illus-sync-bridge {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    position: relative;
    z-index: 1;
}

.illus-sync-bridge .sync-line {
    width: 100%;
    height: 2px;
    background: rgba(255,255,255,0.06);
    position: relative;
    overflow: hidden;
}

.illus-sync-bridge .sync-beam {
    position: absolute;
    top: 0;
    left: -100%;
    width: 50px;
    height: 100%;
    background: linear-gradient(90deg, transparent, var(--accent), var(--success), transparent);
    animation: sync-flow 2.5s infinite linear;
}

@keyframes sync-flow {
    0% { left: -100%; }
    100% { left: 100%; }
}

.sync-status-badge {
    background: rgba(34, 197, 94, 0.12);
    border: 1px solid rgba(34, 197, 94, 0.25);
    color: #22c55e;
    font-size: 0.5rem;
    font-weight: 800;
    letter-spacing: 0.5px;
    padding: 2px 6px;
    border-radius: 6px;
    white-space: nowrap;
    animation: active-pulse-green 2s infinite alternate;
}

@keyframes active-pulse-green {
    0% { box-shadow: 0 0 3px rgba(34, 197, 94, 0.1); }
    100% { box-shadow: 0 0 8px rgba(34, 197, 94, 0.4); }
}

/* --- Self Hosters Terminal --- */
.terminal-container {
    max-width: 850px;
    margin: 3rem auto 0 auto;
    background: #0f172a;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 20px 45px rgba(0,0,0,0.5);
    text-align: left;
}

.terminal-header {
    background: #1e293b;
    padding: 0.85rem 1.25rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.terminal-dots {
    display: flex;
    gap: 6px;
}

.terminal-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.terminal-dot.red { background: #ef4444; }
.terminal-dot.yellow { background: #f59e0b; }
.terminal-dot.green { background: #10b981; }

.terminal-tabs {
    display: flex;
    gap: 0.5rem;
}

.terminal-tab-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.8rem;
    padding: 0.35rem 0.75rem;
    border-radius: 6px;
    cursor: pointer;
    transition: color 0.2s, background-color 0.2s;
}

.terminal-tab-btn:hover {
    color: var(--text);
    background: rgba(255, 255, 255, 0.03);
}

.terminal-tab-btn.active {
    color: var(--accent);
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
}

.terminal-body {
    position: relative;
    padding: 1.5rem;
}

.terminal-pane {
    display: none;
    margin: 0;
}

.terminal-pane.active {
    display: block;
}

.terminal-pane pre {
    margin: 0;
    overflow-x: auto;
}

.terminal-pane code {
    font-family: Consolas, Monaco, "Andale Mono", "Ubuntu Mono", monospace;
    font-size: 0.85rem;
    line-height: 1.6;
    color: #e2e8f0;
}

/* Syntax Highlighting */
.t-comment { color: #64748b; font-style: italic; }
.t-key { color: #f472b6; }
.t-val { color: #38bdf8; }
.t-str { color: #34d399; }
.t-num { color: #fbbf24; }

.terminal-copy-btn {
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--text-muted);
    padding: 0.35rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s, opacity 0.2s;
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.terminal-copy-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text);
    border-color: rgba(255, 255, 255, 0.15);
}

.terminal-copy-btn:active {
    transform: scale(0.97);
}

/* --- Footer --- */
footer {
    padding: 4rem 0;
    border-top: 1px solid var(--glass-border);
    text-align: center;
    color: var(--text-muted);
}

/* --- Animations --- */
[data-reveal] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-reveal].revealed {
    opacity: 1;
    transform: translateY(0);
}


/* --- Legal Pages --- */
.legal-content {
    max-width: 800px;
    margin: 8rem auto 4rem auto;
    padding: 0 2rem;
}

.legal-card {
    background: var(--card);
    padding: 3rem;
    border-radius: 24px;
    border: 1px solid var(--glass-border);
}

.legal-card h1 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    text-align: center;
}

.legal-card h2 {
    font-size: 1.25rem;
    margin-top: 1rem;
    margin-bottom: 0.5rem;
    color: var(--accent);
}

.legal-card p {
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

/* Reset global section padding for legal sections specifically */
.legal-card section {
    padding: 0 !important;
    margin-bottom: 0.75rem;
}

/* --- Join Page Specifics --- */
.join-card {
    max-width: 450px;
    margin: 6rem auto;
    text-align: center;
}

.room-badge {
    display: inline-block;
    background: rgba(99, 102, 241, 0.1);
    color: var(--accent);
    padding: 0.5rem 1rem;
    border-radius: 99px;
    font-size: 0.8rem;
    font-weight: 700;
    margin-bottom: 1rem;
    border: 1px solid rgba(99, 102, 241, 0.2);
}

@media (max-width: 768px) {
    .hero-grid, .step {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .hero-text h1 {
        font-size: 2.5rem;
    }
    .cta-group {
        justify-content: center;
        flex-wrap: wrap;
    }
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(15, 23, 42, 0.95);
        backdrop-filter: blur(12px);
        padding: 1rem 2rem;
        gap: 1rem;
        border-bottom: 1px solid var(--glass-border);
        margin-left: 0;
    }
    .nav-links.open {
        display: flex;
    }
    .nav-right {
        margin-left: auto;
    }
    .hamburger {
        display: none !important;
    }
    .logo-area {
        gap: 0.5rem;
        font-size: 1.2rem;
    }
    .logo-area img {
        height: 48px;
        width: 48px;
    }
    .lang-select-container {
        padding: 4px 10px 4px 8px;
        gap: 4px;
    }
    .lang-select-container .globe-icon {
        width: 14px;
        height: 14px;
    }
    .lang-dropdown {
        font-size: 0.7rem;
        padding: 0 6px 0 0;
    }
    .lang-select-container .chevron-icon {
        width: 10px;
        height: 10px;
    }
    .legal-card {
        padding: 1.5rem;
    }
}

/* --- Language Toggle --- */
html.lang-de [lang="en"] {
    display: none !important;
}
html:not(.lang-de) [lang="de"] {
    display: none !important;
}

/* --- Modern Glassmorphic Language Selector --- */
.lang-select-container {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(30, 41, 59, 0.4);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 9999px;
    padding: 6px 14px 6px 12px;
    transition: background-color 0.3s cubic-bezier(0.4, 0, 0.2, 1), border-color 0.3s cubic-bezier(0.4, 0, 0.2, 1), color 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    color: var(--text-muted);
}

.lang-select-container:hover {
    background: rgba(30, 41, 59, 0.6);
    border-color: rgba(99, 102, 241, 0.3);
    color: var(--text);
    box-shadow: 0 0 15px rgba(99, 102, 241, 0.1);
}

.lang-select-container .globe-icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    opacity: 0.8;
    transition: transform 0.5s ease;
}

.lang-select-container:hover .globe-icon {
    transform: rotate(15deg);
    opacity: 1;
}

.lang-select-container .chevron-icon {
    width: 12px;
    height: 12px;
    flex-shrink: 0;
    pointer-events: none;
    opacity: 0.6;
    margin-left: -2px;
}

.lang-select-container:hover .chevron-icon {
    opacity: 1;
}

.lang-dropdown {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background: transparent;
    border: none;
    outline: none;
    font-family: inherit;
    font-size: 0.8rem;
    font-weight: 600;
    color: currentColor;
    cursor: pointer;
    padding: 0 12px 0 0;
    margin: 0;
    width: auto;
}

.lang-dropdown option {
    background: #0f172a;
    color: white;
    font-family: inherit;
    font-size: 0.9rem;
}

/* --- Hamburger Menu --- */
.hamburger {
    display: none;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    color: var(--text);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.25rem;
    line-height: 1;
}

/* --- Feature Cards: subtle differentiation --- */
.feature-card:nth-child(1) { --card-accent: rgba(99, 102, 241, 0.06); }
.feature-card:nth-child(2) { --card-accent: rgba(139, 92, 246, 0.06); }
.feature-card:nth-child(3) { --card-accent: rgba(34, 197, 94, 0.06); }
.feature-card:nth-child(4) { --card-accent: rgba(56, 189, 248, 0.06); }
.feature-card:nth-child(5) { --card-accent: rgba(245, 158, 11, 0.06); }
.feature-card:nth-child(6) { --card-accent: rgba(236, 72, 153, 0.06); }

.feature-card {
    background: linear-gradient(135deg, var(--card-accent, transparent), var(--card));
}

/* --- Compatibility Section --- */
.compat-section {
    padding: 1rem 0 3.5rem 0;
    text-align: center;
    background: rgba(255,255,255,0.01);
    border-bottom: 1px solid var(--glass-border);
}

.compat-mascot {
    display: block;
    margin: 0 auto 0.5rem auto;
    max-width: 368px;
    width: 100%;
    height: auto;
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.compat-mascot:hover {
    transform: scale(1.05) translateY(-5px) rotate(1deg);
}

.compat-heading {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-muted);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 2rem;
}

.compat-row {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 3rem;
    flex-wrap: wrap;
}

.compat-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-muted);
    transition: opacity 0.3s;
    opacity: 0.55;
}

.compat-logo:hover {
    opacity: 0.85;
}

.compat-logo img {
    width: 28px;
    height: 28px;
    display: block;
}

.compat-more {
    opacity: 0.4;
    cursor: help;
    flex-direction: row;
    gap: 0.35rem;
    position: relative;
}

.compat-more:hover {
    opacity: 0.6;
}

.compat-more-icon {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
}

.compat-tooltip {
    display: none;
    position: absolute;
    bottom: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--card);
    color: var(--text-muted);
    padding: 0.6rem 0.9rem;
    border-radius: 8px;
    font-size: 0.72rem;
    font-weight: 500;
    white-space: nowrap;
    border: 1px solid var(--glass-border);
    box-shadow: 0 8px 20px rgba(0,0,0,0.4);
    z-index: 10;
    line-height: 1.4;
}

.compat-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: var(--glass-border);
}

.compat-more:hover .compat-tooltip {
    display: block;
}

/* --- Join Page Loading Spinner --- */
.join-spinner {
    width: 36px;
    height: 36px;
    border: 3px solid rgba(99, 102, 241, 0.2);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 0.75rem;
}

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

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    [data-reveal] {
        opacity: 1;
        transform: none;
    }
    .blob {
        animation: none;
    }
    .illus-typing-text::after {
        animation: none;
    }
    .illus-timeline-progress {
        animation: none;
        width: 60%;
    }
    .illus-sync-pulse {
        animation: none;
    }
    .illus-extension-icon {
        animation: none;
    }
}

/* --- Use Cases / Anwendungsszenarien Section --- */
.use-cases-section {
    padding: 6rem 0;
    position: relative;
    border-bottom: 1px solid var(--glass-border);
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
    margin-top: 1rem;
}

.use-case-card {
    background: rgba(30, 41, 59, 0.4);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1.2rem 1.6rem 1.7rem 1.6rem;
    text-align: left;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s ease;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    position: relative;
    overflow: hidden;
}

.use-case-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--card-accent-border, var(--accent)), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.use-case-card:nth-child(1) { --card-accent-border: #f59e0b; }
.use-case-card:nth-child(2) { --card-accent-border: #38bdf8; }
.use-case-card:nth-child(3) { --card-accent-border: #ec4899; }


.use-case-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
    border-color: rgba(255, 255, 255, 0.15);
}

.use-case-card:hover::before {
    opacity: 1;
}

.use-case-image {
    display: block;
    width: 100%;
    max-width: 272px;
    height: 150px;
    object-fit: contain;
    border-radius: 8px;
    margin: 0 auto 0 auto;
}

.cta-github-mascot {
    display: block;
    width: 100%;
    max-width: 250px;
    height: auto;
    margin: 1.5rem auto;
}

.features-questions-mascot {
    display: block;
    width: 100%;
    max-width: 250px;
    height: auto;
    margin: -1.5rem auto 0.2rem auto;
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.features-questions-mascot:hover {
    transform: scale(1.05) translateY(-4px) rotate(-1.5deg);
}

.comparison-mascot {
    display: block;
    width: 100%;
    max-width: 260px;
    height: auto;
    margin: -2.2rem auto 0.2rem auto;
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.comparison-mascot:hover {
    transform: scale(1.05) translateY(-4px) rotate(1deg);
}

.use-case-icon {
    font-size: 1.6rem;
    margin-right: 0.6rem;
    display: inline-block;
    vertical-align: middle;
    filter: drop-shadow(0 2px 8px rgba(0,0,0,0.2));
}

.use-case-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0;
    color: white;
}

.use-case-card p {
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--text-muted);
    margin: 0;
}

/* --- Comparison Section --- */
.comparison-section {
    padding: 6rem 0;
    background: rgba(255, 255, 255, 0.01);
    border-bottom: 1px solid var(--glass-border);
}

.comparison-table-wrapper {
    overflow-x: auto;
    background: rgba(30, 41, 59, 0.35);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    margin-top: 1rem;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.95rem;
}

.comparison-table th, 
.comparison-table td {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.comparison-table th {
    background: rgba(15, 23, 42, 0.6);
    font-weight: 700;
    color: white;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.08em;
}

.comparison-table th.highlight,
.comparison-table td.highlight {
    background: rgba(99, 102, 241, 0.08);
}

.comparison-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

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

.feat-name {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.feat-name strong {
    color: white;
    font-weight: 600;
}

.feat-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.check {
    color: #22c55e;
    font-weight: 700;
}

.cross {
    color: #ef4444;
    font-weight: 500;
    opacity: 0.8;
}

@media (max-width: 768px) {
    .comparison-table th, 
    .comparison-table td {
        padding: 1rem;
        font-size: 0.85rem;
    }
    .feat-desc {
        display: none;
    }
}

/* --- Footnotes & Source Links --- */
.source-link {
    color: var(--accent);
    text-decoration: none;
    font-size: 0.72rem;
    font-weight: 700;
    margin-left: 0.25rem;
    display: inline-flex;
    align-items: center;
    vertical-align: super;
    opacity: 0.6;
    transition: opacity 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.source-link:hover {
    opacity: 1;
    color: #38bdf8;
    transform: translateY(-1px);
}

.table-footnotes {
    padding: 0.8rem 1.25rem;
    background: rgba(15, 23, 42, 0.45);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    font-size: 0.72rem;
    color: var(--text-muted);
    line-height: 1.5;
    opacity: 0.65;
    transition: opacity 0.2s ease;
}

.table-footnotes:hover {
    opacity: 0.95;
}

.table-footnotes p {
    margin: 0;
    display: flex;
    align-items: baseline;
    gap: 0.4rem;
}

.table-footnotes p:not(:last-child) {
    margin-bottom: 0.4rem;
}

.table-footnotes a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease, text-decoration 0.2s ease;
}

.table-footnotes a:hover {
    color: #38bdf8;
    text-decoration: underline;
}

.table-footnotes sup {
    font-weight: 700;
    color: var(--accent);
}

@media (max-width: 768px) {
    .table-footnotes {
        padding: 0.75rem 1rem;
        font-size: 0.68rem;
    }
}

/* --- Join & Invitation Page Visuals --- */
.join-status-visual {
    margin-bottom: 2rem;
    position: relative;
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.join-status-mascot {
    display: block;
    width: 140px;
    height: auto;
    z-index: 2;
    filter: drop-shadow(0 4px 12px rgba(0,0,0,0.15));
}

.join-status-mascot.searching-mascot {
    width: 175px; /* Slightly wider due to antenna to keep main body scale identical */
}

.join-status-pulse {
    animation: mascot-gentle-pulse 2s ease-in-out infinite;
}

@keyframes mascot-gentle-pulse {
    0% {
        transform: scale(0.96);
        filter: drop-shadow(0 4px 10px rgba(99, 102, 241, 0.15));
    }
    50% {
        transform: scale(1.04);
        filter: drop-shadow(0 8px 20px rgba(99, 102, 241, 0.35));
    }
    100% {
        transform: scale(0.96);
        filter: drop-shadow(0 4px 10px rgba(99, 102, 241, 0.15));
    }
}

.legal-mascot {
    display: block;
    width: 180px;
    height: auto;
    margin: -0.75rem auto 0.4rem auto;
    filter: drop-shadow(0 4px 12px rgba(0,0,0,0.15));
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.legal-mascot:hover {
    transform: scale(1.06) translateY(-4px) rotate(1.5deg);
}

.selfhost-mascot {
    display: block;
    width: 300px;
    height: auto;
    margin: 0 auto;
    filter: drop-shadow(0 4px 12px rgba(0,0,0,0.15));
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.selfhost-mascot:hover {
    transform: scale(1.05) translateY(-4px) rotate(-1deg);
}

.status-ring {
    position: absolute;
    width: 90px;
    height: 90px;
    border-radius: 50%;
    background: rgba(99, 102, 241, 0.05);
    border: 2px dashed rgba(99, 102, 241, 0.25);
    z-index: 1;
}

.status-ring.active-pulse {
    animation: radar-pulse 3s cubic-bezier(0.25, 0.8, 0.25, 1) infinite;
}

@keyframes radar-pulse {
    0% {
        transform: scale(0.85);
        opacity: 0.9;
        border-color: rgba(99, 102, 241, 0.3);
        box-shadow: 0 0 0 0px rgba(99, 102, 241, 0.15);
    }
    50% {
        transform: scale(1.18);
        opacity: 0.35;
        border-color: rgba(56, 189, 248, 0.2);
        box-shadow: 0 0 0 15px rgba(56, 189, 248, 0);
    }
    100% {
        transform: scale(0.85);
        opacity: 0.9;
        border-color: rgba(99, 102, 241, 0.3);
        box-shadow: 0 0 0 0px rgba(99, 102, 241, 0.15);
    }
}

.join-card-actions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    width: 100%;
}

.join-card-actions .btn {
    width: 100%;
    justify-content: center;
    padding: 1.1rem;
    font-size: 0.88rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.join-card-actions .btn svg {
    margin-right: 0.3rem;
    flex-shrink: 0;
}

.join-card-actions .btn img {
    margin-right: 0.3rem;
    flex-shrink: 0;
}

.btn-success {
    background: #22c55e;
    color: white !important;
    box-shadow: 0 10px 15px -3px rgba(34, 197, 94, 0.3);
}

.btn-success:hover {
    background: #16a34a;
    transform: translateY(-2px);
    box-shadow: 0 20px 25px -5px rgba(34, 197, 94, 0.4);
}

/* --- FAQ Section --- */
.faq-grid {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: rgba(30, 41, 59, 0.45);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 16px;
    padding: 1.5rem 2rem;
    cursor: pointer;
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.faq-item:hover {
    border-color: rgba(99, 102, 241, 0.3);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.1);
}

.faq-item[open] {
    border-color: rgba(99, 102, 241, 0.4);
    background: rgba(30, 41, 59, 0.65);
}

.faq-item summary {
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--text);
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: '+';
    font-size: 1.4rem;
    color: var(--accent);
    font-weight: 300;
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

.faq-item[open] summary::after {
    content: '−';
    transform: rotate(180deg);
}

.faq-item p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

/* --- Focus states for interactive cards --- */
.feature-card:focus-visible,
.use-case-card:focus-visible,
.compat-logo:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 4px;
    transform: translateY(-5px);
}
.feature-card,
.use-case-card,
.compat-logo {
    scroll-margin-top: 100px;
}

/* --- Screen-reader-only (also crawlable by search engines) --- */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* --- Skip-to-content accessibility link --- */
.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    background: var(--accent);
    color: white;
    padding: 0.75rem 1.25rem;
    border-radius: 0 0 8px 0;
    font-weight: 700;
    z-index: 9999;
    text-decoration: none;
}
.skip-link:focus {
    left: 0;
}

/* --- Reduced motion support --- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    .blob { animation: none; }
    .join-status-pulse { animation: none; }
    .status-ring.active-pulse { animation: none; }
}

/* --- will-change hints for animated elements --- */
.blob,
.join-status-pulse,
.status-ring.active-pulse,
.hero-mockup-wrapper,
.cta-group .btn {
    will-change: transform, opacity;
}
@media (prefers-reduced-motion: reduce) {
    .blob,
    .join-status-pulse,
    .status-ring.active-pulse,
    .hero-mockup-wrapper,
    .cta-group .btn {
        will-change: auto;
    }
}