/* ==================== RESET & BASE ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors - Exact match from app themes.ts (Dark Theme) */
    --bg-primary: #000000;           /* Pure black background */
    --bg-surface: #1C1C1E;           /* Card surfaces */
    --bg-surface-variant: #2C2C2E;   /* Variant surfaces */

    --text-primary: #FFFFFF;         /* Primary text */
    --text-secondary: #CCCCCC;       /* Secondary text */
    --text-tertiary: #888888;        /* Tertiary text */

    --primary: #007AFF;              /* iOS blue - primary brand */
    --primary-variant: #0056CC;      /* Darker blue */
    --success: #30D158;              /* Green */
    --warning: #FF9F0A;              /* Orange */
    --error: #FF6B6B;                /* Red */

    --border: rgba(255, 255, 255, 0.3);
    --border-variant: rgba(255, 255, 255, 0.2);
    --shadow: rgba(0, 0, 0, 0.8);

    /* Message bubbles - exact from app */
    --bubble-user: #FFFFFF;
    --bubble-user-text: #000000;
    --bubble-ai: #000000;
    --bubble-ai-text: #FFFFFF;
    --bubble-ai-border: #333333;

    /* Typography - iOS system font stack */
    --font-sans: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Helvetica Neue', 'Helvetica', 'Arial', sans-serif;

    /* Spacing - iOS style */
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;

    /* Border Radius - iOS style */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 9999px;

    /* Shadows - subtle iOS style */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.6);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.7);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.8);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ==================== NAVIGATION ==================== */
.navbar {
    background-color: rgba(0, 0, 0, 0.95);
    border-bottom: 1px solid var(--border);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(20px) saturate(180%);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-logo {
    width: 32px;
    height: 32px;
    border-radius: 7px;
    object-fit: cover;
}

.nav-brand .logo-text {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    transition: color 0.2s;
}

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

.btn-primary {
    background-color: var(--primary);
    color: white;
    padding: 8px 20px;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 15px;
    transition: transform 0.2s, opacity 0.2s;
}

.btn-primary:hover {
    opacity: 0.85;
    transform: translateY(-1px);
}

/* ==================== HERO SECTION ==================== */
.hero {
    padding: var(--spacing-3xl) 0 var(--spacing-2xl);
    text-align: center;
}

.hero-title {
    font-size: clamp(36px, 6vw, 56px);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -1.5px;
    color: var(--text-primary);
}

.hero-subtitle {
    font-size: clamp(16px, 3vw, 20px);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-3xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

/* ==================== ANIMATED CHAT DEMO ==================== */
.chat-demo-container {
    max-width: 390px; /* iPhone width */
    margin: 0 auto var(--spacing-3xl);
    position: relative;
    padding-bottom: 60px; /* Space for pagination dots */
}

.chat-messages {
    min-height: 420px;
    max-height: 420px;
    overflow-y: hidden;
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    background-color: transparent;
}

.chat-messages::-webkit-scrollbar {
    width: 4px;
}

.chat-messages::-webkit-scrollbar-track {
    background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: var(--radius-sm);
}

.message {
    padding: 10px 14px;
    border-radius: var(--radius-md);
    max-width: 75%;
    word-wrap: break-word;
    white-space: pre-wrap;
    font-size: 15px;
    line-height: 1.4;
    opacity: 0;
    transform: translateY(10px);
}

.message.show {
    animation: fadeInUp 0.4s ease-out forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message.user {
    background-color: var(--bubble-user);
    color: var(--bubble-user-text);
    align-self: flex-end;
    margin-left: auto;
    border: 1px solid rgba(221, 221, 221, 0.3);
}

.message.ai {
    background-color: var(--bubble-ai);
    color: var(--bubble-ai-text);
    align-self: flex-start;
    border: 1px solid var(--bubble-ai-border);
}

.typing-indicator {
    display: flex;
    gap: 5px;
    padding: 10px 14px;
    background-color: var(--bubble-ai);
    border-radius: var(--radius-md);
    width: fit-content;
    align-self: flex-start;
    border: 1px solid var(--bubble-ai-border);
}

.typing-indicator span {
    width: 7px;
    height: 7px;
    background-color: 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: 0.4;
        transform: translateY(0);
    }
    30% {
        opacity: 1;
        transform: translateY(-5px);
    }
}

.pagination-dots {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    justify-content: center;
    gap: 8px;
    padding: var(--spacing-md);
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--text-tertiary);
    opacity: 0.4;
    cursor: pointer;
    transition: all 0.3s;
}

.dot.active {
    opacity: 1;
    background-color: var(--primary);
    transform: scale(1.2);
}

.hero-cta {
    margin-top: var(--spacing-xl);
}

.btn-download {
    display: inline-block;
    transition: transform 0.2s, opacity 0.2s;
}

.btn-download:hover {
    transform: scale(1.05);
    opacity: 0.9;
}

.btn-download img {
    height: 60px;
    width: auto;
}

/* ==================== SECTIONS ==================== */
section {
    padding: var(--spacing-3xl) 0;
}

.section-title {
    font-size: clamp(32px, 5vw, 44px);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -1px;
    color: var(--text-primary);
}

.section-subtitle {
    font-size: clamp(15px, 2.5vw, 18px);
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

/* ==================== FEATURES ==================== */
.features {
    background-color: var(--bg-primary);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-xl);
}

.feature-card {
    background-color: transparent;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: transform 0.2s, box-shadow 0.2s;
    border: 1px solid var(--border);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.illustration-wrapper {
    width: 120px;
    height: 120px;
    margin: 0 auto var(--spacing-lg);
    border-radius: 50%;
    overflow: hidden;
    background-color: var(--bg-surface);
    display: flex;
    align-items: center;
    justify-content: center;
}

.illustration-wrapper-large {
    width: 160px;
    height: 160px;
}

.feature-illustration {
    width: 120%;
    height: 120%;
    object-fit: cover;
    object-position: center;
}

.feature-card h3 {
    font-size: 19px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.3px;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.5;
}

/* ==================== HOW IT WORKS ==================== */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-2xl);
}

.step {
    text-align: center;
    padding: var(--spacing-lg);
}

.step-illustration {
    width: 120%;
    height: 120%;
    object-fit: cover;
    object-position: center;
}

.step-number {
    width: 56px;
    height: 56px;
    background-color: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    font-weight: 700;
    margin: 0 auto var(--spacing-lg);
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.3);
}

.step h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.3px;
    color: var(--text-primary);
}

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

/* ==================== SCREENSHOTS SECTION ==================== */
.screenshots-section {
    padding: var(--spacing-3xl) 0;
    background-color: var(--bg-primary);
}

.screenshots-container {
    display: flex;
    gap: var(--spacing-lg);
    overflow-x: auto;
    padding: var(--spacing-lg) 0;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
}

.screenshots-container::-webkit-scrollbar {
    height: 6px;
}

.screenshots-container::-webkit-scrollbar-track {
    background: var(--bg-surface);
    border-radius: var(--radius-sm);
}

.screenshots-container::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: var(--radius-sm);
}

.screenshot-item {
    flex: 0 0 auto;
    width: 280px;
    scroll-snap-align: center;
}

.screenshot-item img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
}

/* ==================== MOTIVATION SECTION ==================== */
.motivation-section {
    background-color: var(--bg-primary);
    padding: var(--spacing-3xl) 0;
    border-top: 1px solid var(--border);
}

.motivation-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-2xl);
    margin-top: var(--spacing-xl);
}

.motivation-card {
    text-align: center;
    padding: var(--spacing-lg);
}

.motivation-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    letter-spacing: -0.3px;
}

.motivation-card p {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.5;
}

/* ==================== SOCIAL PROOF ==================== */
.social-proof {
    background-color: var(--bg-primary);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-2xl);
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: clamp(44px, 6vw, 56px);
    font-weight: 700;
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -1.5px;
}

.stat-label {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ==================== CTA SECTION ==================== */
.cta-section {
    text-align: center;
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-surface) 100%);
    padding: var(--spacing-3xl) 0;
}

.cta-section h2 {
    font-size: clamp(32px, 5vw, 44px);
    margin-bottom: var(--spacing-md);
    font-weight: 700;
    letter-spacing: -1px;
}

.cta-section p {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

/* ==================== FOOTER ==================== */
.footer {
    background: linear-gradient(180deg, var(--bg-surface) 0%, var(--bg-primary) 100%);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-xl);
}

.footer-brand-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: var(--spacing-xs);
}

.footer-logo {
    width: 32px;
    height: 32px;
    border-radius: 7px;
    object-fit: cover;
}

.footer-brand .logo-text {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.footer-brand p {
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
    font-size: 14px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.footer-column h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.footer-column a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    margin-bottom: var(--spacing-xs);
    transition: color 0.2s;
    font-size: 14px;
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    color: var(--text-tertiary);
    font-size: 13px;
}


/* ==================== RESPONSIVE ==================== */
@media (max-width: 768px) {
    .hero {
        padding: var(--spacing-2xl) 0 var(--spacing-xl);
    }

    .hero-title {
        font-size: 36px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .section-title {
        font-size: 32px;
    }

    .nav-links {
        gap: var(--spacing-md);
    }

    .nav-links a:not(.btn-primary) {
        display: none;
    }

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

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

    .chat-demo-container {
        max-width: 100%;
        padding: 0 var(--spacing-md);
    }

    .chat-messages {
        min-height: 350px;
        max-height: 350px;
        overflow-y: hidden;
        padding: var(--spacing-md);
    }

    .steps-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .screenshot-item {
        width: 240px;
    }
}

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

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

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