/* ========================================
   Sleep Atlas — Dark Theme Landing Page
   ======================================== */

/* --- CSS Custom Properties --- */
:root {
    --color-bg: #0a0a0a;
    --color-bg-secondary: #111111;
    --color-bg-tertiary: #1a1a1a;
    --color-bg-card: #141414;
    --color-surface: #1e1e1e;
    --color-border: #2a2a2a;
    --color-border-light: #333333;
    --color-text: #ffffff;
    --color-text-secondary: #a0a0a0;
    --color-text-tertiary: #666666;
    --color-primary: #00bcd4;
    --color-primary-hover: #00d4ed;
    --color-primary-dark: #0097a7;
    --color-primary-alpha: rgba(0, 188, 212, 0.1);
    --color-primary-alpha-strong: rgba(0, 188, 212, 0.2);
    --gradient-primary: linear-gradient(135deg, #00bcd4, #0097a7);
    --gradient-text: linear-gradient(135deg, #00bcd4, #00e5ff);
    --gradient-bg: linear-gradient(180deg, #0a0a0a 0%, #0d1117 100%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(0, 188, 212, 0.15);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --container-max: 1200px;
    --header-height: 72px;
    --section-padding: 120px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
    font-size: inherit;
    color: inherit;
}

img, svg {
    display: block;
    max-width: 100%;
}

ul {
    list-style: none;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* --- Typography --- */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }

.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: var(--color-primary-alpha);
    border: 1px solid rgba(0, 188, 212, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 20px;
}

.section-title {
    margin-bottom: 16px;
}

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

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    line-height: 1.7;
}

.section-header.center {
    text-align: center;
}

.section-header.center .section-subtitle {
    margin: 0 auto;
}

.section-header.center .section-tag {
    margin: 0 auto 20px;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(0, 188, 212, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(0, 188, 212, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

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

.btn-outline:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: var(--color-primary-alpha);
}

.btn-small {
    padding: 10px 20px;
    font-size: 0.875rem;
}

.btn-large {
    padding: 16px 32px;
    font-size: 1rem;
}

.btn-full {
    width: 100%;
}

/* --- Header --- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    z-index: 1000;
    transition: all 0.3s ease;
    background: transparent;
}

.header.scrolled {
    background: rgba(10, 10, 10, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
}

.header-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.125rem;
    color: var(--color-text);
}

.logo-icon {
    flex-shrink: 0;
}

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

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color 0.3s ease;
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* --- Hero Section --- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: calc(var(--header-height) + 40px) 24px 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: 
        linear-gradient(135deg, rgba(10, 10, 10, 0.7) 0%, rgba(10, 10, 10, 0.4) 50%, rgba(10, 10, 10, 0.8) 100%),
        url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1920 1080"><defs><linearGradient id="g1" x1="0%25" y1="0%25" x2="100%25" y2="100%25"><stop offset="0%25" style="stop-color:%230a1628"/><stop offset="50%25" style="stop-color:%230d1f3c"/><stop offset="100%25" style="stop-color:%230a1628"/></linearGradient></defs><rect fill="url(%23g1)" width="1920" height="1080"/></svg>');
    background-size: cover;
    background-position: center;
    z-index: 0;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, transparent 0%, var(--color-bg) 75%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: var(--color-primary-alpha);
    border: 1px solid rgba(0, 188, 212, 0.25);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 32px;
}

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

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--color-text-secondary);
    margin-bottom: 40px;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 60px;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
}

.hero-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.hero-stat-divider {
    width: 1px;
    height: 40px;
    background: var(--color-border);
}

.hero-scroll-indicator {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--color-text-tertiary);
    font-size: 0.75rem;
}

.scroll-mouse {
    width: 24px;
    height: 38px;
    border: 2px solid var(--color-border-light);
    border-radius: 12px;
    display: flex;
    justify-content: center;
    padding-top: 8px;
}

.scroll-wheel {
    width: 3px;
    height: 8px;
    background: var(--color-primary);
    border-radius: 2px;
    animation: scrollWheel 2s infinite;
}

@keyframes scrollWheel {
    0%, 100% { opacity: 1; transform: translateY(0); }
    50% { opacity: 0.3; transform: translateY(8px); }
}

/* --- Section Base --- */
.section {
    padding: var(--section-padding) 0;
}

/* --- Technology Section --- */
.technology-section {
    background: var(--color-bg-secondary);
}

.technology-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-top: 60px;
}

.monitoring-graphic {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 40px;
    position: relative;
    overflow: hidden;
}

.monitoring-graphic::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
}

.heartbeat-line {
    width: 100%;
    height: 100px;
    margin-bottom: 30px;
}

.sleep-stages {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.sleep-stage {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--stage-color);
}

.stage-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--stage-color);
    flex-shrink: 0;
}

.stage-label {
    flex: 1;
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

.stage-value {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text);
}

.info-card {
    display: flex;
    gap: 16px;
    padding: 24px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    transition: all 0.3s ease;
}

.info-card:hover {
    border-color: rgba(0, 188, 212, 0.3);
    box-shadow: var(--shadow-glow);
}

.info-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-alpha);
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.info-card h3 {
    margin-bottom: 8px;
}

.info-card p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* --- Clinic Section --- */
.clinic-section {
    background: var(--color-bg-secondary);
}

.clinic-gallery {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 60px;
}

.clinic-photo {
    min-width: 0;
}

.clinic-photo-frame {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 10px;
    height: 300px;
    transition: all 0.4s ease;
}

.clinic-photo:hover .clinic-photo-frame {
    border-color: rgba(0, 188, 212, 0.4);
    box-shadow: var(--shadow-glow);
    transform: translateY(-4px);
}

.clinic-photo-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-md);
    display: block;
}

.clinic-photo figcaption {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-top: 16px;
    padding: 0 4px;
}

.fig-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-alpha);
    border-radius: var(--radius-sm);
    margin-bottom: 8px;
}

.fig-label {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
}

.fig-note {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

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

.clinic-highlight {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 20px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
    transition: all 0.3s ease;
}

.clinic-highlight:hover {
    border-color: rgba(0, 188, 212, 0.3);
    color: var(--color-text);
    box-shadow: var(--shadow-glow);
}

.clinic-highlight svg {
    flex-shrink: 0;
}

/* --- Features Section --- */
.features-section {
    background: var(--color-bg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 60px;
}

.feature-card {
    padding: 32px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all 0.4s ease;
}

.feature-card:hover {
    border-color: rgba(0, 188, 212, 0.3);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.feature-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-alpha);
    border-radius: var(--radius-md);
    margin-bottom: 20px;
}

.feature-card h3 {
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* --- Showcase Section --- */
.showcase-section {
    background: var(--color-bg-secondary);
}

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

.showcase-content .section-tag {
    margin-bottom: 16px;
}

.showcase-content .section-title {
    margin-bottom: 24px;
}

.showcase-description {
    font-size: 1rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 32px;
}

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

.showcase-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.95rem;
    color: var(--color-text-secondary);
}

.showcase-features li svg {
    flex-shrink: 0;
}

/* Phone Mockup */
.phone-mockup {
    display: flex;
    justify-content: center;
}

.phone-frame {
    width: 280px;
    height: 560px;
    background: #1a1a1a;
    border-radius: 36px;
    border: 3px solid #2a2a2a;
    padding: 12px;
    position: relative;
    box-shadow: var(--shadow-lg), 0 0 60px rgba(0, 188, 212, 0.1);
}

.phone-notch {
    width: 120px;
    height: 24px;
    background: #1a1a1a;
    border-radius: 0 0 16px 16px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: #0d0d0d;
    border-radius: 24px;
    overflow: hidden;
}

.screen-header {
    padding: 32px 16px 12px;
    text-align: center;
}

.screen-time {
    display: block;
    font-size: 0.7rem;
    color: var(--color-text-tertiary);
}

.screen-date {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-top: 2px;
}

.screen-content {
    padding: 0 16px 16px;
}

.sleep-score-circle {
    position: relative;
    width: 120px;
    height: 120px;
    margin: 16px auto;
}

.sleep-score-circle svg {
    width: 100%;
    height: 100%;
}

.score-value {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
}

.score-label {
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.7rem;
    color: var(--color-text-tertiary);
    text-transform: uppercase;
}

.screen-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin: 16px 0;
}

.screen-stat {
    text-align: center;
    padding: 12px;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-sm);
}

.screen-stat-value {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
}

.screen-stat-label {
    display: block;
    font-size: 0.65rem;
    color: var(--color-text-tertiary);
    margin-top: 2px;
}

.screen-chart {
    margin: 16px 0;
    padding: 12px;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-sm);
}

.screen-chart svg {
    width: 100%;
    height: 80px;
}

.screen-stages {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-top: 12px;
}

.screen-stage {
    padding: 8px;
    border-radius: var(--radius-sm);
    text-align: center;
    font-size: 0.65rem;
    font-weight: 600;
    color: #fff;
}

/* --- How It Works --- */
.how-it-works-section {
    background: var(--color-bg);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 60px;
}

.step-card {
    text-align: center;
    padding: 40px 24px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    position: relative;
    transition: all 0.4s ease;
}

.step-card:hover {
    border-color: rgba(0, 188, 212, 0.3);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.step-number {
    position: absolute;
    top: 16px;
    right: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--color-text-tertiary);
}

.step-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-alpha);
    border-radius: 50%;
    margin: 0 auto 20px;
}

.step-card h3 {
    margin-bottom: 12px;
}

.step-card p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* --- Statistics --- */
.stats-section {
    background: var(--color-bg-secondary);
    padding: 80px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    text-align: center;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    min-height: 130px;
    justify-content: flex-start;
}

.stat-value {
    display: flex;
    align-items: baseline;
    gap: 3px;
    min-height: 56px;
    line-height: 1;
}

.stat-big-number {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    color: var(--color-text);
}

.stat-decimal {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 600;
    color: var(--color-primary);
}

.stat-suffix {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 600;
    color: var(--color-primary);
}

.stat-big-label {
    font-size: 0.85rem;
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    white-space: nowrap;
    text-align: center;
    min-height: 20px;
}

/* --- AI Section --- */
.ai-section {
    background: var(--color-bg);
}

.ai-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.chat-container {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.chat-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: var(--color-bg-tertiary);
    border-bottom: 1px solid var(--color-border);
}

.chat-avatar {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-alpha);
    border-radius: 50%;
}

.chat-name {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
}

.chat-status {
    display: block;
    font-size: 0.7rem;
    color: #4caf50;
}

.chat-messages {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-height: 400px;
    overflow-y: auto;
}

.chat-message {
    max-width: 85%;
}

.ai-message {
    align-self: flex-start;
}

.user-message {
    align-self: flex-end;
}

.chat-message p {
    padding: 12px 16px;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    line-height: 1.5;
}

.ai-message p {
    background: var(--color-bg-tertiary);
    border-bottom-left-radius: 4px;
}

.user-message p {
    background: var(--color-primary-alpha-strong);
    border: 1px solid rgba(0, 188, 212, 0.2);
    border-bottom-right-radius: 4px;
}

.ai-insight-card {
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    padding: 16px;
    margin-top: 8px;
}

.insight-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    font-size: 0.85rem;
    font-weight: 600;
}

.insight-score {
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
}

.insight-score.good {
    background: rgba(0, 188, 212, 0.15);
    color: var(--color-primary);
}

.insight-body {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
}

.insight-body p {
    padding: 0;
    background: none;
    border: none;
    margin-bottom: 4px;
}

.ai-content .section-tag {
    margin-bottom: 16px;
}

.ai-content .section-title {
    margin-bottom: 24px;
}

.ai-description {
    font-size: 1rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 32px;
}

.ai-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.ai-feature {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    transition: all 0.3s ease;
}

.ai-feature:hover {
    border-color: rgba(0, 188, 212, 0.3);
    color: var(--color-text);
}

.ai-feature-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-alpha);
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

/* --- CTA Section --- */
.cta-section {
    background: var(--color-bg-secondary);
    text-align: center;
}

.cta-content .section-title {
    margin-bottom: 16px;
}

.cta-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: 32px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

/* --- Footer --- */
.footer {
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
    padding: 60px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    margin: 16px 0 24px;
    line-height: 1.6;
    max-width: 280px;
}

.social-links {
    display: flex;
    gap: 12px;
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
}

.social-link:hover {
    border-color: var(--color-primary);
    background: var(--color-primary-alpha);
}

.footer-links h4 {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.footer-links a {
    display: block;
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    padding: 6px 0;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.footer-bottom p {
    font-size: 0.85rem;
    color: var(--color-text-tertiary);
}

/* --- Modal --- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 40px;
    max-width: 480px;
    width: 90%;
    position: relative;
    transform: translateY(20px);
    transition: transform 0.3s ease;
}

.modal-overlay.active .modal-content {
    transform: translateY(0);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
}

.modal-close:hover {
    background: var(--color-border);
}

.modal-header {
    text-align: center;
    margin-bottom: 32px;
}

.modal-header h3 {
    margin-bottom: 8px;
}

.modal-header p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

.modal-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    position: relative;
}

.form-input {
    width: 100%;
    padding: 16px;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-family: inherit;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 188, 212, 0.1);
}

.form-input:focus ~ .form-label,
.form-input:not(:placeholder-shown) ~ .form-label {
    transform: translateY(-28px) scale(0.8);
    color: var(--color-primary);
}

.form-label {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.9rem;
    color: var(--color-text-tertiary);
    pointer-events: none;
    transition: all 0.3s ease;
    transform-origin: left;
}

.form-textarea ~ .form-label {
    top: 16px;
    transform: none;
}

.form-textarea:focus ~ .form-label,
.form-textarea:not(:placeholder-shown) ~ .form-label {
    top: -8px;
    transform: scale(0.8);
}

.modal-success {
    text-align: center;
    padding: 20px 0;
}

.success-icon {
    margin: 0 auto 20px;
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-alpha);
    border-radius: 50%;
}

.modal-success h3 {
    margin-bottom: 8px;
}

.modal-success p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    margin-bottom: 24px;
}

/* --- Animations --- */
[data-animate] {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

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

/* --- Responsive --- */
@media (max-width: 1024px) {
    :root {
        --section-padding: 80px;
    }

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

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

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }

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

@media (max-width: 768px) {
    :root {
        --section-padding: 60px;
        --header-height: 64px;
    }

    .nav,
    .header .btn-primary {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .nav.mobile-open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: rgba(10, 10, 10, 0.98);
        backdrop-filter: blur(20px);
        padding: 24px;
        gap: 20px;
        border-bottom: 1px solid var(--color-border);
    }

    .hero-stats {
        gap: 24px;
    }

    .hero-scroll-indicator {
        display: none;
    }

    .technology-grid,
    .showcase-grid,
    .ai-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .clinic-gallery {
        grid-template-columns: 1fr;
    }

    .clinic-photo-wide {
        grid-row: auto;
    }

    .clinic-highlights {
        grid-template-columns: 1fr;
    }

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

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

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

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

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

    .hero-actions .btn {
        width: 100%;
    }

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

    .modal-content {
        padding: 24px;
    }
}

@media (max-width: 480px) {
    .hero-stats {
        flex-direction: column;
        gap: 16px;
    }

    .hero-stat-divider {
        display: none;
    }

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