/* Grok-inspired CSS for DeepCompanion */

/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Grok color palette */
    --black: #000000;
    --dark-gray: #0A0A0A;
    --gray: #1A1A1A;
    --light-gray: #2A2A2A;
    --white: #FFFFFF;
    --text-secondary: #A0A0A0;
    --accent-cyan: #00D9FF;
    --accent-cyan-hover: #00B8D4;
    --accent-cyan-dark: #0097A7;
    --success: #00E676;
    --warning: #FFB74D;
    --error: #FF5252;
    --purple: #BB86FC;
    --gradient: linear-gradient(135deg, var(--accent-cyan) 0%, var(--purple) 100%);
}

body {
    font-family: 'SF Pro Text', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    background: var(--black);
    color: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-logo {
    font-size: 24px;
}

.nav-title {
    font-family: 'SF Pro Display', sans-serif;
    font-size: 20px;
    font-weight: 600;
    color: var(--white);
}

.nav-version {
    background: var(--accent-cyan);
    color: var(--black);
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

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

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

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

.nav-link.primary {
    background: var(--accent-cyan);
    color: var(--black);
    padding: 8px 16px;
    border-radius: 20px;
    font-weight: 600;
    transition: all 0.2s ease;
}

.nav-link.primary:hover {
    background: var(--accent-cyan-hover);
    transform: translateY(-1px);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 64px;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 80%, rgba(0, 217, 255, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(187, 134, 252, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.hero-title {
    font-family: 'SF Pro Display', sans-serif;
    font-size: 56px;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
}

.gradient-text {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.5;
}

.hero-features {
    display: flex;
    gap: 24px;
    margin-bottom: 40px;
}

.hero-feature {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

.feature-icon {
    font-size: 16px;
}

.hero-actions {
    display: flex;
    gap: 16px;
}

.btn-primary,
.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 24px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s ease;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: var(--accent-cyan);
    color: var(--black);
}

.btn-primary:hover {
    background: var(--accent-cyan-hover);
    transform: translateY(-2px);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.btn-arrow,
.btn-play {
    opacity: 0.8;
}

/* Hero Visual */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-card {
    background: var(--gray);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    overflow: hidden;
    width: 100%;
    max-width: 500px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    background: var(--light-gray);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.card-controls {
    display: flex;
    gap: 8px;
}

.control-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.control-dot.red { background: #FF5F56; }
.control-dot.yellow { background: #FFBD2E; }
.control-dot.green { background: #27CA3F; }

.card-title {
    font-weight: 600;
    font-size: 14px;
}

.card-content {
    padding: 20px;
}

.chat-preview {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.message {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.message-sender {
    font-weight: 600;
    font-size: 14px;
    color: var(--accent-cyan);
}

.message.user .message-sender {
    color: var(--accent-cyan);
}

.message.assistant .message-sender {
    color: var(--success);
}

.message p {
    font-size: 14px;
    color: var(--text-secondary);
    margin: 0;
}

.code-block {
    background: var(--dark-gray);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 12px;
    margin-top: 8px;
}

.code-lang {
    font-size: 12px;
    color: var(--warning);
    font-weight: 500;
}

.code-block pre {
    font-family: 'SF Mono', monospace;
    font-size: 12px;
    color: var(--white);
    margin-top: 8px;
    overflow-x: auto;
}

/* Features Section */
.features {
    padding: 120px 0;
    background: var(--dark-gray);
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-title {
    font-family: 'SF Pro Display', sans-serif;
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.feature-card {
    background: var(--gray);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 32px;
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-cyan);
    box-shadow: 0 20px 40px rgba(0, 217, 255, 0.1);
}

.feature-card .feature-icon {
    font-size: 32px;
    margin-bottom: 20px;
    display: block;
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Models Section */
.models {
    padding: 120px 0;
}

.models-tabs {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 48px;
}

.tab-btn {
    background: var(--gray);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
    padding: 12px 24px;
    border-radius: 24px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 500;
}

.tab-btn.active,
.tab-btn:hover {
    background: var(--accent-cyan);
    color: var(--black);
    border-color: var(--accent-cyan);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.models-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.model-card {
    background: var(--gray);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 24px;
    transition: all 0.3s ease;
}

.model-card:hover {
    transform: translateY(-2px);
    border-color: var(--accent-cyan);
}

.model-card.cloud {
    border-color: rgba(187, 134, 252, 0.3);
}

.model-card.cloud:hover {
    border-color: var(--purple);
}

.model-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.model-icon {
    font-size: 24px;
}

.model-header h3 {
    font-size: 18px;
    font-weight: 600;
}

.model-name {
    color: var(--accent-cyan);
    font-weight: 600;
    margin-bottom: 8px;
}

.model-desc {
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.model-stats {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.stat {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

/* Demo Section */
.demo {
    padding: 120px 0;
    background: var(--dark-gray);
}

.demo-container {
    display: flex;
    justify-content: center;
}

.demo-card {
    background: var(--gray);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    overflow: hidden;
    width: 100%;
    max-width: 600px;
}

.demo-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    background: var(--light-gray);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.demo-tabs {
    display: flex;
    gap: 16px;
}

.demo-tab {
    padding: 6px 12px;
    border-radius: 12px;
    font-size: 14px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
}

.demo-tab.active {
    background: var(--accent-cyan);
    color: var(--black);
}

.demo-status {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--success);
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.demo-chat {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.demo-message {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.message-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sender {
    font-weight: 600;
    font-size: 14px;
}

.demo-message.user .sender {
    color: var(--accent-cyan);
}

.demo-message.assistant .sender {
    color: var(--success);
}

.timestamp {
    font-size: 12px;
    color: var(--text-secondary);
}

.demo-message p {
    color: var(--text-secondary);
    margin: 0;
}

.typing-indicator {
    display: flex;
    gap: 4px;
    align-items: center;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    background: var(--text-secondary);
    border-radius: 50%;
    animation: typing 1.4s infinite;
}

.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing {
    0%, 60%, 100% { opacity: 0.3; }
    30% { opacity: 1; }
}

/* Download Section */
.download {
    padding: 120px 0;
}

.download-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.download-title {
    font-family: 'SF Pro Display', sans-serif;
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 16px;
}

.download-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 48px;
}

.download-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.btn-download {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--gray);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--white);
    padding: 16px 24px;
    border-radius: 12px;
    text-decoration: none;
    transition: all 0.2s ease;
    min-width: 180px;
}

.btn-download:hover {
    background: var(--light-gray);
    transform: translateY(-2px);
}

.btn-download.primary {
    background: var(--accent-cyan);
    color: var(--black);
    border-color: var(--accent-cyan);
}

.btn-download.primary:hover {
    background: var(--accent-cyan-hover);
}

.download-icon {
    font-size: 20px;
}

.download-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.download-label {
    font-size: 12px;
    opacity: 0.7;
}

.download-platform {
    font-weight: 600;
}

.download-info {
    display: flex;
    gap: 32px;
    justify-content: center;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
}

.info-icon {
    color: var(--success);
}

.github-link {
    margin-top: 40px;
}

.btn-github {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--white);
    padding: 12px 20px;
    border-radius: 24px;
    text-decoration: none;
    transition: all 0.2s ease;
}

.btn-github:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

/* AI Modes Section */
.modes {
    padding: 80px 0;
    background: var(--dark-gray);
}

.modes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.mode-card {
    background: var(--gray);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 30px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.mode-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.mode-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-cyan);
    box-shadow: 0 20px 40px rgba(0, 217, 255, 0.1);
}

.mode-card:hover::before {
    transform: scaleX(1);
}

.mode-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.mode-icon {
    font-size: 32px;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient);
    border-radius: 12px;
}

.mode-info h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.mode-type {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.mode-content p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.6;
}

.mode-features {
    list-style: none;
    margin-bottom: 30px;
}

.mode-features li {
    padding: 6px 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.mode-btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    text-align: center;
    min-width: 160px;
}

.mode-btn.primary {
    background: var(--gradient);
    color: var(--white);
}

.mode-btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 217, 255, 0.3);
}

.mode-btn.secondary {
    border: 1px solid var(--accent-cyan);
    color: var(--accent-cyan);
    background: transparent;
}

.mode-btn.secondary:hover {
    background: var(--accent-cyan);
    color: var(--black);
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero .container {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .hero-title {
        font-size: 40px;
    }
    
    .hero-features {
        flex-direction: column;
        gap: 16px;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .nav-links {
        display: none;
    }
    
    .features-grid,
    .models-grid {
        grid-template-columns: 1fr;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .download-info {
        flex-direction: column;
        gap: 16px;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .footer-links {
        gap: 20px;
    }
    
    .modes-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .mode-card {
        padding: 20px;
    }
    
    .mode-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    
    .mode-icon {
        font-size: 24px;
        width: 48px;
        height: 48px;
    }
    
    .mode-info h3 {
        font-size: 1.3rem;
    }
}