/* ==========================================================================
   SetVita Landing Page Styles
   Dark theme matching the app's design system
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties (Design Tokens)
   -------------------------------------------------------------------------- */
:root {
    /* Colors */
    --color-bg-dark: #1A1A2E;
    --color-bg-card: #252542;
    --color-bg-elevated: #2D2D4A;
    --color-primary: #4A90E2;
    --color-primary-hover: #5BA0F2;
    --color-primary-glow: rgba(74, 144, 226, 0.3);
    --color-text-primary: #FFFFFF;
    --color-text-secondary: #A8A8C0;
    --color-text-muted: #6A6A7F;
    --color-accent-green: #4CAF50;
    --color-border: rgba(255, 255, 255, 0.1);

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;

    /* Layout */
    --container-max: 1200px;
    --container-padding: var(--space-6);

    /* Effects */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 20px var(--color-primary-glow);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

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

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

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

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

/* --------------------------------------------------------------------------
   Utility Classes
   -------------------------------------------------------------------------- */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.text-gradient {
    background: linear-gradient(135deg, var(--color-primary) 0%, #7C5CE7 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* --------------------------------------------------------------------------
   Button Styles
   -------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-3) var(--space-6);
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-text-primary);
}

.btn-primary:hover {
    background: var(--color-primary-hover);
    box-shadow: var(--shadow-glow);
    transform: translateY(-1px);
}

.btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: var(--font-size-xs);
}

/* --------------------------------------------------------------------------
   Navigation
   -------------------------------------------------------------------------- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: var(--space-4) 0;
    background: rgba(26, 26, 46, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.logo-img {
    width: 32px;
    height: 32px;
}

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: 700;
}

.nav-links {
    display: none;
    align-items: center;
    gap: var(--space-8);
}

.nav-links a {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

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

.nav-links .btn {
    margin-left: var(--space-4);
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-btn span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-text-primary);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 65px;
    left: 0;
    right: 0;
    background: var(--color-bg-dark);
    padding: var(--space-6);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 99;
    border-bottom: 1px solid var(--color-border);
}

.mobile-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
}

.mobile-menu a {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    padding: var(--space-2) 0;
}

.mobile-menu a:hover {
    color: var(--color-text-primary);
}

/* Desktop nav */
@media (min-width: 768px) {
    .nav-links {
        display: flex;
    }

    .mobile-menu-btn,
    .mobile-menu {
        display: none;
    }
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--space-24) 0 var(--space-16);
    overflow: hidden;
}

.hero .container {
    display: grid;
    gap: var(--space-12);
    align-items: center;
}

.hero-content {
    text-align: center;
}

.hero-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--space-6);
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-8);
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
    justify-content: center;
}

.store-badge {
    display: block;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.store-badge:hover {
    transform: translateY(-2px);
}

.store-badge img {
    height: 48px;
    width: auto;
}

.store-badge-lg img {
    height: 56px;
}

/* Hero Image */
.hero-image {
    display: flex;
    justify-content: center;
}

/* Phone Mockup */
.phone-mockup {
    position: relative;
}

.phone-frame {
    width: 280px;
    height: 580px;
    background: linear-gradient(145deg, #2D2D4A 0%, #1A1A2E 100%);
    border-radius: 40px;
    padding: 12px;
    box-shadow: var(--shadow-lg), 0 0 0 1px rgba(255, 255, 255, 0.1);
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: var(--color-bg-card);
    border-radius: 32px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.placeholder-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
    color: var(--color-text-muted);
}

.placeholder-icon {
    opacity: 0.5;
}

.placeholder-text {
    font-size: var(--font-size-sm);
    opacity: 0.5;
}

.phone-mockup-sm .phone-frame {
    width: 200px;
    height: 420px;
    border-radius: 32px;
    padding: 8px;
}

.phone-mockup-sm .phone-screen {
    border-radius: 26px;
}

/* Hero Background */
.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
    background:
        radial-gradient(ellipse at 50% 0%, rgba(74, 144, 226, 0.15) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 50%, rgba(124, 92, 231, 0.1) 0%, transparent 40%);
}

/* Hero responsive */
@media (min-width: 768px) {
    .hero-title {
        font-size: var(--font-size-4xl);
    }
}

@media (min-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-16);
    }

    .hero-content {
        text-align: left;
    }

    .hero-cta {
        justify-content: flex-start;
    }

    .hero-title {
        font-size: var(--font-size-5xl);
    }
}

/* --------------------------------------------------------------------------
   Sections Common Styles
   -------------------------------------------------------------------------- */
.section-header {
    text-align: center;
    margin-bottom: var(--space-12);
}

.section-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--space-4);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

@media (min-width: 768px) {
    .section-title {
        font-size: var(--font-size-3xl);
    }
}

/* --------------------------------------------------------------------------
   Features Section
   -------------------------------------------------------------------------- */
.features {
    padding: var(--space-20) 0;
    background: var(--color-bg-dark);
}

.features-grid {
    display: grid;
    gap: var(--space-6);
}

.feature-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-8);
    border: 1px solid var(--color-border);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.feature-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(74, 144, 226, 0.1);
    border-radius: var(--radius-md);
    color: var(--color-primary);
    margin-bottom: var(--space-5);
}

.feature-icon-accent {
    background: rgba(76, 175, 80, 0.1);
    color: var(--color-accent-green);
}

.feature-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--space-3);
}

.feature-description {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

@media (min-width: 768px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .feature-card {
        padding: var(--space-6);
    }
}

/* --------------------------------------------------------------------------
   Share Section (reuses screenshots-carousel)
   -------------------------------------------------------------------------- */
.share-section {
    padding: var(--space-20) 0;
    background: linear-gradient(180deg, var(--color-bg-dark) 0%, var(--color-bg-card) 50%, var(--color-bg-dark) 100%);
}

/* Mock UI inside phone screens */
.mock-ui {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    padding: var(--space-6);
    text-align: center;
}

.mock-header {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
}

.mock-meta {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.mock-divider {
    width: 100%;
    height: 1px;
    background: var(--color-border);
    margin: var(--space-4) 0;
}

.mock-action {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    background: rgba(74, 144, 226, 0.1);
    border-radius: var(--radius-md);
    color: var(--color-primary);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.mock-icon-circle {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(74, 144, 226, 0.1);
    border-radius: var(--radius-full);
    color: var(--color-primary);
    margin-bottom: var(--space-4);
}

.mock-icon-success {
    background: rgba(76, 175, 80, 0.15);
    color: var(--color-accent-green);
}

.mock-link-text {
    font-size: var(--font-size-xs);
    color: var(--color-primary);
    background: var(--color-bg-elevated);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-4);
    font-family: monospace;
}

.mock-btn {
    padding: var(--space-2) var(--space-4);
    background: var(--color-bg-elevated);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-primary);
}

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

/* --------------------------------------------------------------------------
   Screenshots Section
   -------------------------------------------------------------------------- */
.screenshots {
    padding: var(--space-20) 0;
    background: linear-gradient(180deg, var(--color-bg-dark) 0%, var(--color-bg-card) 100%);
}

.screenshots-carousel {
    display: flex;
    gap: var(--space-6);
    overflow-x: auto;
    padding: var(--space-4) 0;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.screenshots-carousel::-webkit-scrollbar {
    display: none;
}

.screenshot-item {
    flex: 0 0 auto;
    scroll-snap-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
}

.screenshot-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    font-weight: 500;
}

@media (min-width: 1024px) {
    .screenshots-carousel {
        justify-content: center;
        overflow-x: visible;
    }
}

/* --------------------------------------------------------------------------
   Stats Section
   -------------------------------------------------------------------------- */
.stats {
    padding: var(--space-16) 0;
    background: var(--color-bg-card);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
}

.stats-grid.stats-grid-4 {
    grid-template-columns: repeat(2, 1fr);
}

@media (min-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-8);
    }

    .stats-grid.stats-grid-4 {
        grid-template-columns: repeat(4, 1fr);
    }

    .stat-number {
        font-size: var(--font-size-4xl);
    }

    .stat-label {
        font-size: var(--font-size-base);
    }
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--space-2);
}

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

/* --------------------------------------------------------------------------
   Story / Why Section
   -------------------------------------------------------------------------- */
.story-section {
    padding: var(--space-20) 0;
    background: linear-gradient(180deg, var(--color-bg-card) 0%, var(--color-bg-dark) 100%);
}

.story-grid {
    display: grid;
    gap: var(--space-6);
    margin-bottom: var(--space-12);
}

.story-card {
    text-align: center;
    padding: var(--space-6);
}

.story-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(74, 144, 226, 0.1);
    border-radius: var(--radius-full);
    color: var(--color-primary);
    margin: 0 auto var(--space-5);
}

.story-card-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--space-3);
    color: var(--color-text-primary);
}

.story-card-text {
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: var(--color-text-secondary);
    margin: 0;
}

.transparency-bar {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
    text-align: center;
    padding: var(--space-6);
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.transparency-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-full);
    color: var(--color-text-muted);
    flex-shrink: 0;
}

.transparency-text {
    font-size: var(--font-size-sm);
    line-height: 1.7;
    color: var(--color-text-secondary);
    margin: 0;
}

.transparency-text strong {
    color: var(--color-text-primary);
}

@media (min-width: 768px) {
    .story-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-8);
    }

    .transparency-bar {
        flex-direction: row;
        text-align: left;
        padding: var(--space-5) var(--space-8);
        max-width: 800px;
        margin: 0 auto;
    }
}

/* Story card animations */
.story-grid [data-animate]:nth-child(1) { transition-delay: 0ms; }
.story-grid [data-animate]:nth-child(2) { transition-delay: 100ms; }
.story-grid [data-animate]:nth-child(3) { transition-delay: 200ms; }

/* --------------------------------------------------------------------------
   Download CTA Section
   -------------------------------------------------------------------------- */
.download-cta {
    padding: var(--space-24) 0;
    background: var(--color-bg-dark);
    position: relative;
}

.download-cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 800px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-border), transparent);
}

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

.cta-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--space-4);
}

.cta-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-8);
}

.cta-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
    justify-content: center;
    margin-bottom: var(--space-6);
}

.cta-note {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

@media (min-width: 768px) {
    .cta-title {
        font-size: var(--font-size-4xl);
    }
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
    padding: var(--space-12) 0 var(--space-8);
    background: var(--color-bg-card);
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
    align-items: center;
    text-align: center;
    padding-bottom: var(--space-8);
    border-bottom: 1px solid var(--color-border);
}

.footer-brand .logo {
    justify-content: center;
    margin-bottom: var(--space-3);
}

.footer-tagline {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-6);
    justify-content: center;
}

.footer-links a {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

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

.footer-bottom {
    padding-top: var(--space-8);
    text-align: center;
}

.footer-bottom p {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

@media (min-width: 768px) {
    .footer-content {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }

    .footer-brand .logo {
        justify-content: flex-start;
    }
}

/* --------------------------------------------------------------------------
   Animations
   -------------------------------------------------------------------------- */
[data-animate] {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

/* Staggered animations for feature cards */
.features-grid [data-animate]:nth-child(1) { transition-delay: 0ms; }
.features-grid [data-animate]:nth-child(2) { transition-delay: 100ms; }
.features-grid [data-animate]:nth-child(3) { transition-delay: 200ms; }
.features-grid [data-animate]:nth-child(4) { transition-delay: 300ms; }
.features-grid [data-animate]:nth-child(5) { transition-delay: 400ms; }
.features-grid [data-animate]:nth-child(6) { transition-delay: 500ms; }
.features-grid [data-animate]:nth-child(7) { transition-delay: 600ms; }
.features-grid [data-animate]:nth-child(8) { transition-delay: 700ms; }

.screenshots-carousel [data-animate]:nth-child(1) { transition-delay: 0ms; }
.screenshots-carousel [data-animate]:nth-child(2) { transition-delay: 100ms; }
.screenshots-carousel [data-animate]:nth-child(3) { transition-delay: 200ms; }
.screenshots-carousel [data-animate]:nth-child(4) { transition-delay: 300ms; }

.stats-grid [data-animate]:nth-child(1) { transition-delay: 0ms; }
.stats-grid [data-animate]:nth-child(2) { transition-delay: 100ms; }
.stats-grid [data-animate]:nth-child(3) { transition-delay: 200ms; }
.stats-grid [data-animate]:nth-child(4) { transition-delay: 300ms; }