:root {
    /* Light Theme (Default) - matching popup.css */
    --bg: #f5f5f7;
    --bg-gradient-end: #eeeef2;
    --bg-elevated: #ffffff;
    --bg-hover: #f0f0f2;
    --bg-active: #e8e8ec;
    --border: #e0e0e5;
    --border-subtle: #eaeaef;

    --text: #1c1c1e;
    --text-secondary: #6e6e73;
    --text-tertiary: #aeaeb2;

    --accent: #6366f1;
    --accent-hover: #4f46e5;

    --gpt: #10a37f;
    --claude: #d97757;
    --gemini: #4285f4;
    --perplexity: #4b5563;
    --wave: #8b5cf6;

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-full: 100px;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.08);
}

/* Dark Theme */
[data-theme="dark"] {
    --bg: #0a0a0b;
    --bg-gradient-end: #0f0f12;
    --bg-elevated: #141416;
    --bg-hover: #1c1c1f;
    --bg-active: #242428;
    --border: #2a2a2e;
    --border-subtle: #1f1f23;

    --text: #fafafa;
    --text-secondary: #a1a1a6;
    --text-tertiary: #636366;

    --accent: #6366f1;
    --accent-hover: #818cf8;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.3);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(180deg, var(--bg) 0%, var(--bg-gradient-end) 100%);
    color: var(--text);
    font-size: 16px;
    line-height: 1.6;
    min-height: 100vh;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border-subtle);
    z-index: 100;
}

.navbar-content {
    max-width: 50%;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

@media (max-width: 1200px) {
    .navbar-content {
        max-width: 70%;
    }
}

@media (max-width: 768px) {
    .navbar-content {
        max-width: 100%;
        padding: 14px 20px;
    }
}

.navbar-logo {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 8px;
}

.beta-badge {
    padding: 2px 8px;
    background: rgba(99, 102, 241, 0.12);
    color: var(--accent);
    border-radius: var(--radius-full);
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.navbar-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

@media (max-width: 600px) {
    .navbar-links {
        gap: 20px;
    }
}

.nav-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.15s ease;
}

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

.nav-link.active {
    color: var(--text);
}

.btn-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn-icon:hover {
    background: var(--bg-hover);
    color: var(--text);
    box-shadow: var(--shadow-md);
}

main {
    max-width: 50%;
    margin: 0 auto;
    padding: 120px 24px 80px;
}

@media (max-width: 1200px) {
    main {
        max-width: 70%;
    }
}

@media (max-width: 768px) {
    main {
        max-width: 100%;
        padding: 100px 20px 48px;
    }
}

/* Hero Section */
.hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
    margin-bottom: 120px;
}

@media (max-width: 900px) {
    .hero {
        grid-template-columns: 1fr;
        gap: 48px;
    }
}

.hero-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    letter-spacing: -1px;
    line-height: 1.1;
    color: var(--text);
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 36px;
    }
}

.hero-tagline {
    font-size: 20px;
    color: var(--text);
    line-height: 1.5;
    font-weight: 500;
    max-width: 420px;
}

.hero-description {
    font-size: 16px;
    color: var(--text-tertiary);
    line-height: 1.6;
    max-width: 400px;
}

.btn-cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 24px;
    background: var(--accent);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.15s ease;
    width: fit-content;
}

.btn-cta:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-cta i {
    font-size: 18px;
}

/* Trust Note */
.trust-note {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-tertiary);
    margin-top: 4px;
}

.trust-note i {
    font-size: 14px;
    color: var(--accent);
}

/* Hero Visual - Chat Cards */
.hero-visual {
    position: relative;
    height: 320px;
}

@media (max-width: 900px) {
    .hero-visual {
        height: 280px;
    }
}

.chat-card {
    position: absolute;
    padding: 14px 16px;
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    width: 240px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.chat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.card-1 {
    top: 0;
    left: 0;
    transform: rotate(-2deg);
}

.card-2 {
    top: 60px;
    right: 0;
    transform: rotate(3deg);
}

.card-3 {
    bottom: 60px;
    left: 20px;
    transform: rotate(1deg);
}

.card-4 {
    bottom: 0;
    right: 20px;
    transform: rotate(-1deg);
}

@media (max-width: 900px) {
    .chat-card {
        width: 200px;
        padding: 12px 14px;
    }

    .card-1 {
        top: 0;
        left: 0;
    }

    .card-2 {
        top: 40px;
        right: 0;
    }

    .card-3 {
        bottom: 40px;
        left: 10px;
    }

    .card-4 {
        bottom: 0;
        right: 10px;
    }
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
}

.card-source {
    padding: 3px 8px;
    border-radius: var(--radius-sm);
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.card-source.chatgpt {
    background: rgba(16, 163, 127, 0.15);
    color: var(--gpt);
}

.card-source.claude {
    background: rgba(217, 119, 87, 0.15);
    color: var(--claude);
}

.card-source.gemini {
    background: rgba(66, 133, 244, 0.15);
    color: var(--gemini);
}

.card-source.perplexity {
    background: rgba(75, 85, 99, 0.15);
    color: var(--perplexity);
}

.card-details {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.card-prompts {
    display: flex;
    align-items: center;
    gap: 4px;
    white-space: nowrap;
    font-size: 12px;
    color: var(--text-tertiary);
}

.card-time {
    font-size: 11px;
    color: var(--text-tertiary);
}

.card-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text);
    line-height: 1.4;
}

/* Highlights Section (compact) */
.highlights {
    margin-bottom: 80px;
}

.highlights-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

@media (max-width: 768px) {
    .highlights-row {
        grid-template-columns: 1fr;
    }
}

.highlight-card {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px;
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.highlight-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-active);
    border-radius: var(--radius-sm);
    color: var(--accent);
    font-size: 18px;
    flex-shrink: 0;
}

.highlight-content {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.highlight-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
}

.highlight-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Feature Showcases */
.showcases {
    margin-bottom: 120px;
}

.showcase {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 48px;
    align-items: center;
    margin-bottom: 80px;
}

.showcase:last-child {
    margin-bottom: 0;
}

.showcase-reverse {
    grid-template-columns: 1.2fr 1fr;
}

.showcase-reverse .showcase-text {
    order: 2;
}

.showcase-reverse .showcase-video {
    order: 1;
}

@media (max-width: 768px) {
    .showcase,
    .showcase-reverse {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .showcase-reverse .showcase-text,
    .showcase-reverse .showcase-video {
        order: unset;
    }
}

.showcase-text {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.showcase-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-active);
    border-radius: var(--radius-md);
    color: var(--accent);
    font-size: 22px;
}

.showcase-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.5px;
}

.showcase-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.showcase-video {
    width: 100%;
}

.video-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    aspect-ratio: 16 / 9;
    background: var(--bg-elevated);
    border: 2px dashed var(--border);
    border-radius: var(--radius-lg);
    color: var(--text-tertiary);
    font-size: 48px;
    transition: all 0.15s ease;
}

.video-placeholder:hover {
    border-color: var(--accent);
    color: var(--accent);
}

@media (max-width: 768px) {
    .showcase-title {
        font-size: 20px;
    }

    .video-placeholder {
        font-size: 40px;
    }
}

/* Supported Sources Section */
.sources {
    margin-bottom: 80px;
}

.sources-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

@media (max-width: 900px) {
    .sources-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 600px) {
    .sources-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.source-card {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 24px 16px;
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: all 0.15s ease;
}

.source-card:not(.coming-soon):hover {
    border-color: var(--border);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.source-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    font-size: 22px;
}

.source-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
}

/* Source card colors */
.source-card.chatgpt .source-icon {
    background: rgba(16, 163, 127, 0.12);
    color: var(--gpt);
}

.source-card.claude .source-icon {
    background: rgba(217, 119, 87, 0.12);
    color: var(--claude);
}

.source-card.gemini .source-icon {
    background: rgba(66, 133, 244, 0.12);
    color: var(--gemini);
}

.source-card.perplexity .source-icon {
    background: rgba(75, 85, 99, 0.12);
    color: var(--perplexity);
}

.source-card.wave .source-icon {
    background: rgba(139, 92, 246, 0.12);
    color: var(--wave);
}

/* Coming soon cards */
.source-card.coming-soon {
    opacity: 0.5;
    cursor: default;
}

.source-card.coming-soon .source-icon {
    background: var(--bg-active);
    color: var(--text-tertiary);
}

.source-card.coming-soon .source-name {
    color: var(--text-tertiary);
}

.coming-soon-badge {
    position: absolute;
    top: 8px;
    right: 8px;
    padding: 2px 8px;
    background: var(--bg-active);
    border-radius: var(--radius-full);
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    color: var(--text-tertiary);
}

.section-title {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-tertiary);
    margin-bottom: 32px;
}

/* Footer */
.footer {
    text-align: center;
    padding: 0px 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.footer-headline {
    font-size: 32px;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--text);
    max-width: 400px;
    line-height: 1.2;
}

@media (max-width: 768px) {
    .footer-headline {
        font-size: 24px;
    }
}

.footer-note {
    font-size: 13px;
    color: var(--text-tertiary);
}

.copyright {
    font-size: 12px;
    color: var(--text-tertiary);
    margin-top: 32px;
}

/* Updates Page */
.updates-header {
    margin-bottom: 48px;
}

.updates-title {
    font-size: 36px;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--text);
    margin-bottom: 8px;
}

.updates-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
}

.updates-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-bottom: 80px;
}

.update-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: all 0.15s ease;
}

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

.update-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-subtle);
}

.update-version {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    background: rgba(99, 102, 241, 0.1);
    color: var(--accent);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 700;
    letter-spacing: -0.3px;
}

.update-date {
    font-size: 13px;
    color: var(--text-tertiary);
}

.update-body {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.update-section {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.update-section-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.update-section-title.added {
    color: #10a37f;
}

.update-section-title.changed {
    color: #f59e0b;
}

.update-section-title.fixed {
    color: #6366f1;
}

.update-section-title.removed {
    color: #ef4444;
}

.update-section-title i {
    font-size: 14px;
}

.update-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding-left: 22px;
}

.update-list li {
    position: relative;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.update-list li::before {
    content: "";
    position: absolute;
    left: -14px;
    top: 9px;
    width: 4px;
    height: 4px;
    background: var(--text-tertiary);
    border-radius: 50%;
}

@media (max-width: 768px) {
    .updates-title {
        font-size: 28px;
    }

    .update-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
        padding: 16px 20px;
    }

    .update-body {
        padding: 20px;
    }
}