/* ============================================
   ShallowTV Landing Page Styles
   ============================================ */

/* CSS Variables */
:root {
    --color-primary: #6366f1;
    --color-primary-dark: #4f46e5;
    --color-primary-light: #818cf8;
    --color-secondary: #0ea5e9;
    --color-accent: #f59e0b;

    --color-bg: #0f0f14;
    --color-bg-secondary: #1a1a24;
    --color-bg-card: #242432;
    --color-bg-elevated: #2d2d3d;

    --color-text: #ffffff;
    --color-text-secondary: #a1a1aa;
    --color-text-muted: #71717a;

    --color-border: #3f3f50;

    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.4);

    --transition: 0.2s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--color-primary-light);
    text-decoration: none;
    transition: color var(--transition);
}

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

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

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 15, 20, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
}

.nav-logo:hover {
    color: var(--color-text);
}

.logo-icon {
    font-size: 1.5rem;
}

.logo-icon-img {
    width: 32px;
    height: 32px;
    object-fit: contain;
}

.footer-logo-img {
    width: 24px;
    height: 24px;
    object-fit: contain;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-xl);
}

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

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
    transition: all var(--transition);
    cursor: pointer;
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: var(--color-text);
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
    color: var(--color-text);
}

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

.btn-secondary:hover {
    background: var(--color-bg-elevated);
    color: var(--color-text);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: calc(80px + var(--spacing-3xl)) 0 var(--spacing-3xl);
    background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-secondary) 100%);
}

.hero-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-2xl);
}

.hero-content {
    flex: 1;
    max-width: 600px;
}

.hero h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

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

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Device Mockup */
.device-mockup {
    width: 100%;
    max-width: 500px;
    aspect-ratio: 16/10;
    background: var(--color-bg-card);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-sm);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--color-border);
}

.mockup-screen {
    width: 100%;
    height: 100%;
    background: var(--color-bg);
    border-radius: var(--radius-xl);
    overflow: hidden;
    padding: var(--spacing-lg);
}

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

.mockup-category {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-secondary);
}

.mockup-cards {
    display: flex;
    gap: var(--spacing-sm);
}

.mockup-card {
    width: 80px;
    height: 50px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    border-radius: var(--radius-md);
    opacity: 0.6;
}

.mockup-card:nth-child(2) {
    background: linear-gradient(135deg, var(--color-secondary), var(--color-accent));
}

.mockup-card:nth-child(3) {
    background: linear-gradient(135deg, var(--color-accent), var(--color-primary));
}

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

.section-title {
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

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

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

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

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

/* Screenshots Section */
.screenshots {
    background: var(--color-bg);
}

.screenshots-gallery {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-xl);
}

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

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

.screenshot-caption {
    margin-top: var(--spacing-md);
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

.screenshot-disclaimer {
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.75rem;
    font-style: italic;
    padding: var(--spacing-lg);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

/* Hero Screenshot */
.hero-screenshot {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
}

/* Platforms Section */
.platforms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.platform-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    text-align: center;
    border: 1px solid var(--color-border);
    transition: transform var(--transition), border-color var(--transition);
}

.platform-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-primary);
}

.platform-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.platform-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.platform-card p {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-md);
}

.platform-version {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-bg);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* Download Section */
.download {
    background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-secondary) 100%);
    text-align: center;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-xl);
}

.download-badge img {
    height: 50px;
    transition: transform var(--transition);
}

.download-badge:hover img {
    transform: scale(1.05);
}

.download-note {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.coming-soon {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    padding: var(--spacing-xl) var(--spacing-2xl);
    background: var(--color-bg-card);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
}

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

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
}

.footer-links {
    display: flex;
    gap: var(--spacing-xl);
}

.footer-links a {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

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

.footer-copyright {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    text-align: center;
}

/* Support Page */
.support-page {
    padding-top: calc(80px + var(--spacing-2xl));
    min-height: 100vh;
}

.support-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.support-header h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--spacing-md);
}

.support-header p {
    color: var(--color-text-secondary);
    font-size: 1.125rem;
}

.support-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-3xl);
}

.support-section h2 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-lg);
}

.contact-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    text-align: center;
    border: 1px solid var(--color-border);
    margin-bottom: var(--spacing-lg);
}

.contact-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.contact-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.contact-card p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.response-note {
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    border-left: 3px solid var(--color-primary);
}

.response-note p {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    margin: 0;
}

/* FAQ */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

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

.faq-item summary {
    padding: var(--spacing-lg);
    cursor: pointer;
    font-weight: 600;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--color-text-muted);
    transition: transform var(--transition);
}

.faq-item[open] summary::after {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--color-text-secondary);
}

.faq-answer ul,
.faq-answer ol {
    margin: var(--spacing-md) 0;
    padding-left: var(--spacing-xl);
}

.faq-answer li {
    margin-bottom: var(--spacing-sm);
}

/* Tips Section */
.tips-section {
    background: var(--color-bg-secondary);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-2xl);
    margin-top: var(--spacing-2xl);
}

.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-lg);
}

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

.tip-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.tip-card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.tip-card p {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    line-height: 1.6;
}

/* Legal Pages (Privacy Policy) */
.legal-page {
    padding-top: calc(80px + var(--spacing-2xl));
    padding-bottom: var(--spacing-3xl);
    min-height: 100vh;
}

.legal-header {
    margin-bottom: var(--spacing-2xl);
}

.legal-header h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--spacing-sm);
}

.last-updated {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.legal-content {
    max-width: 800px;
}

.legal-content section {
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--color-border);
}

.legal-content section:last-child {
    border-bottom: none;
}

.legal-content h2 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
}

.legal-content p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.legal-content ul {
    color: var(--color-text-secondary);
    margin: var(--spacing-md) 0;
    padding-left: var(--spacing-xl);
}

.legal-content li {
    margin-bottom: var(--spacing-sm);
    line-height: 1.7;
}

.legal-content strong {
    color: var(--color-text);
}

/* Disclaimer Highlight Box */
.disclaimer-highlight {
    padding: var(--spacing-xl) 0 !important;
    border-bottom: none !important;
}

.highlight-box {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1), rgba(239, 68, 68, 0.05));
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    margin-top: var(--spacing-md);
}

.highlight-box p {
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

.highlight-box p:last-child {
    margin-bottom: 0;
}

.final-notice {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl) !important;
    text-align: center;
    border: 1px solid var(--color-border);
}

.final-notice p {
    margin: 0;
    color: var(--color-text);
}

/* Responsive Design */
@media (max-width: 968px) {
    .hero {
        padding-top: calc(80px + var(--spacing-2xl));
    }

    .hero-container {
        flex-direction: column;
        text-align: center;
    }

    .hero-content {
        max-width: 100%;
        margin-bottom: var(--spacing-2xl);
    }

    .hero-buttons {
        justify-content: center;
    }

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

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

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

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

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

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

    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
    }

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