/* ============================================
   Flimra Website Styles
   Design System based on the iOS/tvOS app
   ============================================ */

/* CSS Custom Properties (Design Tokens) */
:root {
    /* Colors - from app Color+Theme.swift */
    --color-primary: #DB34F2;
    --color-primary-dark: #B828D0;
    --color-primary-muted: rgba(219, 52, 242, 0.15);

    --color-background: #0A0A0F;
    --color-surface: #12121A;
    --color-elevated: #1A1A24;
    --color-overlay: #252532;

    --color-text-primary: #FFFFFF;
    --color-text-secondary: #B3B3B3;
    --color-text-tertiary: #666666;

    --color-success: #4ADE80;
    --color-live: #E63956;
    --color-warning: #FBBF24;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', '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 */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 24px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-glow: 0 0 60px rgba(219, 52, 242, 0.3);
    --shadow-glow-sm: 0 0 30px rgba(219, 52, 242, 0.2);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;

    /* Container */
    --container-max: 1200px;
    --container-padding: var(--spacing-lg);
}

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

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

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

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

ul {
    list-style: none;
}

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

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

/* Container */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* ============================================
   Navigation
   ============================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: var(--spacing-md) 0;
    background: transparent;
    transition: background var(--transition-base);
}

.nav.scrolled {
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 700;
    font-size: var(--font-size-lg);
    letter-spacing: 0.1em;
}

.nav-logo-icon {
    width: 32px;
    height: 32px;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-sm);
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    transition: var(--transition-fast);
}

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

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

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

.nav-cta {
    background: var(--color-primary);
    color: var(--color-text-primary) !important;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    transition: background var(--transition-fast), transform var(--transition-fast);
}

.nav-cta:hover {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(10, 10, 15, 0.98);
        backdrop-filter: blur(20px);
        padding: var(--spacing-xl);
        gap: var(--spacing-lg);
        transform: translateY(-20px);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition-base);
    }

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

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

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

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

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

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

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-sm);
}

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-text-primary);
    border: 1px solid var(--color-overlay);
}

.btn-secondary:hover {
    background: var(--color-elevated);
    transform: translateY(-2px);
}

.btn-large {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: var(--font-size-lg);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-4xl) 0;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 50% at 50% 0%, rgba(219, 52, 242, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse 60% 40% at 80% 100%, rgba(184, 40, 208, 0.1) 0%, transparent 50%),
        var(--color-background);
    z-index: -1;
}

.hero-content {
    text-align: center;
    max-width: 800px;
}

.hero-logo {
    margin-bottom: var(--spacing-xl);
    animation: glow 3s ease-in-out infinite;
}

@keyframes glow {
    0%, 100% {
        filter: drop-shadow(0 0 30px rgba(219, 52, 242, 0.4));
        transform: scale(1);
    }
    50% {
        filter: drop-shadow(0 0 50px rgba(219, 52, 242, 0.6));
        transform: scale(1.02);
    }
}

.logo-icon {
    width: 120px;
    height: 120px;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    letter-spacing: 0.2em;
    margin-bottom: var(--spacing-md);
}

.hero-tagline {
    font-size: var(--font-size-2xl);
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: var(--spacing-xl);
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto var(--spacing-2xl);
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.hero-scroll {
    position: absolute;
    bottom: var(--spacing-2xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-text-tertiary);
    font-size: var(--font-size-sm);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(10px); }
}

/* ============================================
   Section Styles
   ============================================ */
section {
    padding: var(--spacing-4xl) 0;
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

/* ============================================
   Features Section
   ============================================ */
.features {
    background:
        radial-gradient(ellipse 50% 30% at 0% 50%, rgba(219, 52, 242, 0.08) 0%, transparent 50%),
        var(--color-background);
}

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

.feature-card {
    background: var(--color-surface);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    transition: all var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: rgba(219, 52, 242, 0.3);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: var(--color-primary-muted);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

.feature-icon svg {
    width: 24px;
    height: 24px;
    fill: var(--color-primary);
}

.feature-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

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

/* ============================================
   Screenshots Section
   ============================================ */
.screenshots {
    overflow: hidden;
}

.screenshots-grid {
    display: flex;
    gap: var(--spacing-xl);
    justify-content: center;
    align-items: flex-start;
    flex-wrap: wrap;
}

.screenshot-device {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
}

.device-frame {
    background: var(--color-surface);
    border: 3px solid var(--color-elevated);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-sm);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4);
}

.device-screen {
    background: var(--color-background);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.iphone .device-frame {
    width: 220px;
}

.iphone .device-screen {
    width: 100%;
    aspect-ratio: 9/19.5;
}

.appletv .device-frame {
    width: 480px;
}

.appletv .device-screen {
    width: 100%;
    aspect-ratio: 16/9;
}

.ipad .device-frame {
    width: 280px;
}

.ipad .device-screen {
    width: 100%;
    aspect-ratio: 4/3;
}

.device-screen img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top;
}

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

@media (max-width: 1200px) {
    .screenshots-grid {
        gap: var(--spacing-lg);
    }

    .iphone .device-frame {
        width: 180px;
    }

    .appletv .device-frame {
        width: 380px;
    }
}

@media (max-width: 900px) {
    .iphone .device-frame {
        width: 150px;
    }

    .appletv .device-frame {
        width: 320px;
    }
}

@media (max-width: 768px) {
    .screenshots-grid {
        flex-wrap: wrap;
        justify-content: center;
    }

    .iphone .device-frame {
        width: 130px;
    }

    .appletv .device-frame {
        width: 280px;
    }
}

/* ============================================
   How It Works Section
   ============================================ */
.how-it-works {
    background: var(--color-surface);
}

.steps {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.step {
    flex: 1;
    min-width: 200px;
    max-width: 280px;
    text-align: center;
    padding: var(--spacing-xl);
}

.step-number {
    width: 40px;
    height: 40px;
    background: var(--color-primary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: var(--font-size-lg);
    margin: 0 auto var(--spacing-lg);
}

.step-icon {
    width: 64px;
    height: 64px;
    background: var(--color-primary-muted);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
}

.step-icon svg {
    width: 32px;
    height: 32px;
    fill: var(--color-primary);
}

.step h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.step p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

.step-arrow {
    display: flex;
    align-items: center;
    padding-top: 80px;
}

.step-arrow svg {
    width: 32px;
    height: 32px;
    fill: var(--color-text-tertiary);
}

@media (max-width: 768px) {
    .step-arrow {
        display: none;
    }

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

/* ============================================
   FAQ Section
   ============================================ */
.faq-list {
    max-width: 700px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--color-overlay);
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-xl) 0;
    font-size: var(--font-size-lg);
    font-weight: 500;
    color: var(--color-text-primary);
    text-align: left;
    transition: color var(--transition-fast);
}

.faq-question:hover {
    color: var(--color-primary);
}

.faq-question svg {
    width: 24px;
    height: 24px;
    fill: var(--color-text-tertiary);
    transition: transform var(--transition-base);
    flex-shrink: 0;
}

.faq-item.active .faq-question svg {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
}

.faq-item.active .faq-answer {
    max-height: 300px;
}

.faq-answer p {
    padding-bottom: var(--spacing-xl);
    color: var(--color-text-secondary);
    line-height: 1.8;
}

/* ============================================
   Download CTA Section
   ============================================ */
.download {
    background:
        radial-gradient(ellipse 60% 50% at 50% 100%, rgba(219, 52, 242, 0.15) 0%, transparent 50%),
        var(--color-background);
}

.download-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.download-content h2 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.download-content p {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-2xl);
}

.download-buttons {
    display: flex;
    justify-content: center;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--color-surface);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
    border-top: 1px solid var(--color-overlay);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-3xl);
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 700;
    font-size: var(--font-size-lg);
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-md);
}

.footer-logo-icon {
    width: 40px;
    height: 40px;
}

.footer-brand p {
    color: var(--color-text-secondary);
}

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

.footer-column h4 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-tertiary);
    margin-bottom: var(--spacing-lg);
}

.footer-column ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

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

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-overlay);
    color: var(--color-text-tertiary);
    font-size: var(--font-size-sm);
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

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

    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .footer-links {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   Utility Classes
   ============================================ */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeInUp 0.6s ease forwards;
}

/* ============================================
   Responsive Typography
   ============================================ */
@media (max-width: 768px) {
    :root {
        --font-size-5xl: 2.5rem;
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.5rem;
    }

    .hero-title {
        letter-spacing: 0.15em;
    }

    .logo-icon {
        width: 80px;
        height: 80px;
    }
}