/* ========================================
   VLStream - Modern Product Website
   Inspired by Railway.app design language
   ======================================== */

/* CSS Variables */
:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #111118;
    --bg-tertiary: #1a1a24;
    --bg-card: #13131d;
    --bg-card-hover: #1a1a28;
    --border-color: rgba(255, 255, 255, 0.06);
    --border-color-hover: rgba(255, 255, 255, 0.12);
    --text-primary: #f4f4f5;
    --text-secondary: #a1a1aa;
    --text-tertiary: #71717a;
    --accent-purple: #a855f7;
    --accent-indigo: #6366f1;
    --accent-violet: #7c3aed;
    --accent-green: #22c55e;
    --gradient-primary: linear-gradient(135deg, #6366f1, #a855f7);
    --gradient-text: linear-gradient(135deg, #818cf8, #c084fc);
    --gradient-glow: radial-gradient(ellipse at center, rgba(99, 102, 241, 0.15), transparent 70%);
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

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

/* ========================================
   Navigation
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.logo-icon {
    width: 28px;
    height: 28px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 28px;
}

.nav-links a {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color var(--transition);
}

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

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

/* Language Switcher */
.nav-lang {
    position: relative;
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.82rem;
    color: var(--text-secondary);
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    user-select: none;
    white-space: nowrap;
}

.nav-lang:hover {
    background: rgba(255, 255, 255, 0.06);
    color: var(--accent-indigo);
}

.nav-lang svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.nav-lang-current {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.82rem;
}

.nav-lang-chevron {
    width: 12px;
    height: 12px;
    opacity: 0.5;
    transition: transform 0.2s ease;
}

.nav-lang.open .nav-lang-chevron {
    transform: rotate(180deg);
}

.nav-lang-dropdown {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color-hover);
    border-radius: var(--radius-md);
    padding: 6px 0;
    min-width: 180px;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: all 0.2s ease;
    z-index: 1001;
}

.nav-lang.open .nav-lang-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-lang-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 14px;
    font-size: 0.82rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.nav-lang-item:hover {
    background: rgba(255, 255, 255, 0.06);
    color: var(--accent-indigo);
}

.nav-lang-item.active {
    color: var(--accent-indigo);
    font-weight: 600;
    background: rgba(99, 102, 241, 0.08);
}

.nav-lang-item-flag {
    font-size: 1.1rem;
    line-height: 1;
    flex-shrink: 0;
    width: 20px;
    text-align: center;
}

.nav-lang-item-label {
    flex: 1;
}

.nav-lang-item-check {
    width: 14px;
    height: 14px;
    opacity: 0;
    flex-shrink: 0;
}

.nav-lang-item.active .nav-lang-item-check {
    opacity: 1;
}



.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.mobile-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    font-family: var(--font-family);
    cursor: pointer;
    transition: all var(--transition);
    border: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    box-shadow: 0 0 30px rgba(99, 102, 241, 0.5);
    transform: translateY(-1px);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color-hover);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.2);
}

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

.btn-ghost:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--border-color-hover);
}

.btn-lg {
    padding: 14px 28px;
    font-size: 0.9375rem;
    border-radius: var(--radius-md);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero-glow {
    position: absolute;
    top: -20%;
    left: 50%;
    transform: translateX(-50%);
    width: 900px;
    height: 700px;
    background: radial-gradient(ellipse at center, rgba(99, 102, 241, 0.12) 0%, rgba(168, 85, 247, 0.06) 40%, transparent 70%);
    pointer-events: none;
}

.hero-grid-bg {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 100px;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--accent-purple);
    margin-bottom: 32px;
}

.badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent-green);
    animation: pulse 2s infinite;
}

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

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
}

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

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 640px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 64px;
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    padding: 24px 40px;
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    flex-wrap: wrap;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.stat-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    font-family: var(--font-mono);
}

.stat-label {
    font-size: 0.6875rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-divider {
    width: 1px;
    height: 32px;
    background: var(--border-color);
}

/* ========================================
   Sections Common
   ======================================== */
.section {
    padding: 120px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    max-width: 640px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ========================================
   Pain Points Section
   ======================================== */
.painpoints-section {
    background: var(--bg-secondary);
}

.painpoints-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
}

.painpoint-card {
    padding: 28px 20px;
    border-radius: var(--radius-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: all var(--transition);
}

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

.painpoint-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    background: rgba(99, 102, 241, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    color: var(--accent-indigo);
}

.painpoint-card h4 {
    font-size: 0.9375rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.painpoint-card p {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ========================================
   Dual AI Section
   ======================================== */
.dualai-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.dualai-card {
    padding: 36px;
    border-radius: var(--radius-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    transition: all var(--transition);
}

.dualai-card:hover {
    border-color: var(--border-color-hover);
}

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

.dualai-header h3 {
    font-size: 1.125rem;
    font-weight: 700;
}

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

.dualai-dot.discriminative {
    background: var(--accent-indigo);
    box-shadow: 0 0 8px rgba(99, 102, 241, 0.5);
}

.dualai-dot.decision {
    background: var(--accent-purple);
    box-shadow: 0 0 8px rgba(168, 85, 247, 0.5);
}

.dualai-badge {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 3px 10px;
    border-radius: 100px;
    background: rgba(99, 102, 241, 0.1);
    color: var(--accent-purple);
    border: 1px solid rgba(99, 102, 241, 0.2);
}

.dualai-desc {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.dualai-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.dualai-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.dualai-list li svg {
    color: var(--accent-green);
    flex-shrink: 0;
}

/* ========================================
   Architecture Section
   ======================================== */
.architecture-section {
    background: var(--bg-secondary);
}

.arch-diagram {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 0;
}

.arch-layer {
    padding: 28px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    background: var(--bg-card);
}

.arch-layer-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.arch-layer-header h4 {
    font-size: 0.9375rem;
    font-weight: 600;
}

.arch-layer-tag {
    font-size: 0.6875rem;
    font-weight: 500;
    padding: 3px 10px;
    border-radius: 100px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-tertiary);
    border: 1px solid var(--border-color);
    margin-left: auto;
}

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

.cloud-dot {
    background: var(--accent-indigo);
    box-shadow: 0 0 8px rgba(99, 102, 241, 0.5);
}

.edge-dot {
    background: var(--accent-purple);
    box-shadow: 0 0 8px rgba(168, 85, 247, 0.5);
}

.device-dot {
    background: #f59e0b;
    box-shadow: 0 0 8px rgba(245, 158, 11, 0.5);
}

.app-dot {
    background: var(--accent-green);
    box-shadow: 0 0 8px rgba(34, 197, 94, 0.5);
}

.arch-items {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
    gap: 10px;
}

.arch-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all var(--transition);
}

.arch-item:hover {
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-primary);
    border-color: var(--border-color-hover);
}

.arch-item svg {
    color: var(--accent-indigo);
    flex-shrink: 0;
}

.arch-connector {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 0;
    justify-content: center;
}

.connector-line {
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-color-hover), transparent);
    max-width: 100px;
}

.connector-label {
    font-size: 0.6875rem;
    color: var(--text-tertiary);
    font-weight: 500;
    letter-spacing: 0.02em;
    padding: 5px 12px;
    border-radius: 100px;
    border: 1px solid var(--border-color);
    background: var(--bg-tertiary);
    font-family: var(--font-mono);
}

/* ========================================
   Hardware Section
   ======================================== */
.hardware-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 48px;
}

.hardware-grid-3col {
    grid-template-columns: repeat(3, 1fr);
}

.hardware-category {
    margin-top: 8px;
    margin-bottom: 24px;
}

.hardware-category-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--text-primary);
}

.hardware-category-desc {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    line-height: 1.6;
    max-width: 640px;
}

.hardware-category-badge {
    display: inline-block;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--accent-purple);
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: 4px;
    padding: 2px 8px;
    vertical-align: middle;
    margin-left: 8px;
    position: relative;
    top: -1px;
}

.hardware-card {
    padding: 28px 24px;
    border-radius: var(--radius-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    transition: all var(--transition);
    position: relative;
}

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

.hardware-card-featured {
    border-color: rgba(99, 102, 241, 0.3);
    background: linear-gradient(180deg, rgba(99, 102, 241, 0.05) 0%, var(--bg-card) 100%);
}

.hardware-tier {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--accent-purple);
    margin-bottom: 8px;
}

.hardware-card h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 8px;
    font-family: var(--font-mono);
}

.hardware-spec-highlight {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.hardware-specs {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.hardware-specs li {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    padding-left: 16px;
    position: relative;
}

.hardware-specs li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--accent-indigo);
}

.hardware-popular {
    position: absolute;
    top: -1px;
    right: 20px;
    font-size: 0.6875rem;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
    background: var(--gradient-primary);
    color: white;
}

.hardware-chips {
    text-align: center;
}

.hardware-chips-label {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
}

.chips-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}

.chip {
    padding: 6px 14px;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 500;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-family: var(--font-mono);
}

/* ========================================
   VLM Streaming Section
   ======================================== */
.vlm-section {
    background: var(--bg-secondary);
}

.vlm-content {
    display: flex;
    flex-direction: column;
    gap: 48px;
}

.vlm-diagram {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    flex-wrap: wrap;
    padding: 32px;
    border-radius: var(--radius-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
}

.vlm-step {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
}

.vlm-step-num {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    color: white;
    flex-shrink: 0;
}

.vlm-step-content h5 {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 2px;
}

.vlm-step-content p {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    max-width: 180px;
}

.vlm-arrow {
    color: var(--text-tertiary);
    flex-shrink: 0;
}

.vlm-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.vlm-feature-card {
    padding: 24px;
    border-radius: var(--radius-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
}

.vlm-feature-card h5 {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.vlm-models {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.vlm-models span {
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    color: var(--accent-purple);
    font-family: var(--font-mono);
}

.vlm-feature-card ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.vlm-feature-card ul li {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    padding-left: 14px;
    position: relative;
}

.vlm-feature-card ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 7px;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--accent-green);
}

.vlm-perf {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.vlm-perf-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.vlm-perf-value {
    font-size: 1.5rem;
    font-weight: 700;
    font-family: var(--font-mono);
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.vlm-perf-label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

/* ========================================
   Pipeline Section
   ======================================== */
.pipeline-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    max-width: 1000px;
    margin: 0 auto;
}

.pipeline-step {
    position: relative;
    padding: 28px 20px;
    border-radius: var(--radius-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    transition: all var(--transition);
}

.pipeline-step:hover {
    border-color: var(--border-color-hover);
    transform: translateY(-2px);
}

.step-number {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.4;
    margin-bottom: 12px;
    font-family: var(--font-mono);
}

.step-content h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.step-content p {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ========================================
   Performance Section
   ======================================== */
.performance-section {
    background: var(--bg-secondary);
}

.perf-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.perf-card {
    padding: 28px;
    border-radius: var(--radius-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    transition: all var(--transition);
}

.perf-card:hover {
    border-color: var(--border-color-hover);
}

.perf-value {
    font-size: 2rem;
    font-weight: 800;
    font-family: var(--font-mono);
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 4px;
}

.perf-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.perf-detail {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    line-height: 1.5;
}

/* ========================================
   Protocol Section
   ======================================== */
.protocol-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.protocol-card {
    padding: 28px;
    border-radius: var(--radius-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    transition: all var(--transition);
}

.protocol-card:hover {
    border-color: var(--border-color-hover);
}

.protocol-card h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.protocol-card ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.protocol-card ul li {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.protocol-card ul li strong {
    color: var(--text-primary);
    font-weight: 500;
}

/* ========================================
   Deploy Section
   ======================================== */
.deploy-section {
    background: var(--bg-secondary);
}

.deploy-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 48px;
}

.deploy-card {
    padding: 28px;
    border-radius: var(--radius-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    transition: all var(--transition);
}

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

.deploy-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    color: var(--accent-indigo);
}

.deploy-card-header h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.deploy-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 20px;
}

.deploy-code {
    display: block;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-color);
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--accent-purple);
    overflow-x: auto;
}

.deploy-compatibility {
    text-align: center;
}

.compat-label {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
}

.compat-grid {
    display: flex;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
}

.compat-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.compat-icon {
    font-size: 0.6875rem;
    font-weight: 700;
    font-family: var(--font-mono);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    background: rgba(99, 102, 241, 0.1);
    color: var(--accent-indigo);
    border: 1px solid rgba(99, 102, 241, 0.2);
}

/* ========================================
   Use Cases Section
   ======================================== */
.usecases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.usecase-card {
    padding: 28px 24px;
    border-radius: var(--radius-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    transition: all var(--transition);
}

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

.usecase-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: rgba(99, 102, 241, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    color: var(--accent-indigo);
}

.usecase-card h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.usecase-card p {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ========================================
   Open Source Section
   ======================================== */
.opensource-section {
    background: var(--bg-secondary);
}

.repos-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-bottom: 40px;
}

.repo-card {
    padding: 24px;
    border-radius: var(--radius-md);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    transition: all var(--transition);
}

.repo-card:hover {
    border-color: var(--border-color-hover);
}

.repo-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
    color: var(--text-tertiary);
}

.repo-name {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    font-family: var(--font-mono);
}

.repo-license {
    margin-left: auto;
    font-size: 0.6875rem;
    font-weight: 500;
    padding: 2px 8px;
    border-radius: 100px;
    background: rgba(34, 197, 94, 0.1);
    color: var(--accent-green);
    border: 1px solid rgba(34, 197, 94, 0.2);
}

.repo-card p {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.opensource-cta {
    text-align: center;
}

/* ========================================
   Comparison Section
   ======================================== */
.comparison-table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.comparison-table th,
.comparison-table td {
    padding: 16px 20px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.comparison-table thead th {
    background: var(--bg-card);
    font-weight: 600;
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--text-tertiary);
}

.comparison-table tbody td {
    color: var(--text-secondary);
}

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

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

.comparison-table .highlight-col {
    color: var(--accent-green);
    font-weight: 500;
    background: rgba(34, 197, 94, 0.03);
}

.comparison-table thead .highlight-col {
    color: var(--accent-green);
    background: rgba(34, 197, 94, 0.05);
}

/* ========================================
   Advantages Section
   ======================================== */
.advantages-section {
    background: var(--bg-secondary);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.advantage-card {
    padding: 36px 28px;
    border-radius: var(--radius-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    transition: all var(--transition);
}

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

.advantage-num {
    font-size: 2.5rem;
    font-weight: 800;
    font-family: var(--font-mono);
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.4;
    margin-bottom: 16px;
}

.advantage-card h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.advantage-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ========================================
   CTA Section
   ======================================== */
.cta-section {
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 400px;
    background: radial-gradient(ellipse at center, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.cta-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

.cta-subtitle {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

.cta-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 24px;
}

.cta-support {
    margin-top: 24px;
}

.cta-support p {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
}

/* ========================================
   Footer
   ======================================== */
.footer {
    padding: 80px 0 40px;
    border-top: 1px solid var(--border-color);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.2fr 2.8fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-brand .nav-logo {
    margin-bottom: 16px;
}

.footer-desc {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    line-height: 1.6;
    max-width: 280px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.footer-col h5 {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-primary);
    margin-bottom: 14px;
}

.footer-col a {
    display: block;
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    padding: 3px 0;
    transition: color var(--transition);
}

.footer-col a:hover {
    color: var(--text-primary);
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 32px;
    border-top: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: 16px;
}

.footer-bottom p {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.footer-bottom-links {
    display: flex;
    gap: 20px;
}

.footer-bottom-links a {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    transition: color var(--transition);
}

.footer-bottom-links a:hover {
    color: var(--text-primary);
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
    .painpoints-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .dualai-grid {
        grid-template-columns: 1fr;
    }

    .hardware-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .pipeline-steps {
        grid-template-columns: repeat(2, 1fr);
    }

    .perf-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .protocol-grid {
        grid-template-columns: 1fr;
    }

    .vlm-features {
        grid-template-columns: 1fr;
    }

    .usecases-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .advantages-grid {
        grid-template-columns: 1fr;
    }

    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links,
    .nav-actions {
        display: none;
    }

    .mobile-toggle {
        display: flex;
    }

    .hero-title {
        font-size: 2.25rem;
    }

    .hero-actions {
        flex-direction: column;
    }

    .hero-stats {
        flex-direction: column;
        gap: 16px;
        padding: 24px;
    }

    .stat-divider {
        width: 32px;
        height: 1px;
    }

    .painpoints-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .hardware-grid {
        grid-template-columns: 1fr;
    }

    .pipeline-steps {
        grid-template-columns: 1fr;
    }

    .deploy-grid {
        grid-template-columns: 1fr;
    }

    .perf-grid {
        grid-template-columns: 1fr;
    }

    .usecases-grid {
        grid-template-columns: 1fr;
    }

    .repos-grid {
        grid-template-columns: 1fr;
    }

    .vlm-diagram {
        flex-direction: column;
        padding: 20px;
    }

    .vlm-arrow {
        transform: rotate(90deg);
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .section {
        padding: 80px 0;
    }

    .arch-items {
        grid-template-columns: 1fr;
    }

    .cta-actions {
        flex-direction: column;
    }

    .compat-grid {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero {
        padding: 100px 0 60px;
    }

    .hero-title {
        font-size: 1.875rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .painpoints-grid {
        grid-template-columns: 1fr;
    }

    .comparison-table th,
    .comparison-table td {
        padding: 12px 14px;
        font-size: 0.75rem;
    }
}

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

.hero-badge,
.hero-title,
.hero-subtitle,
.hero-actions,
.hero-stats {
    animation: fadeInUp 0.6s ease-out forwards;
}

.hero-badge { animation-delay: 0.1s; }
.hero-title { animation-delay: 0.2s; }
.hero-subtitle { animation-delay: 0.3s; }
.hero-actions { animation-delay: 0.4s; }
.hero-stats { animation-delay: 0.5s; }

/* Smooth scroll offset for fixed nav */
:target {
    scroll-margin-top: 80px;
}