/* ===================================
   VEChat Landing Page Styles
   Theme: The Rebirth of Packet Radio
   =================================== */

/* CSS Custom Properties */
:root {
    /* Colors - Dark theme with teal accents (matches app icon #1A6B5A) */
    --color-bg: #0a0a0f;
    --color-bg-secondary: #0f1212;
    --color-bg-card: #151a1a;
    --color-accent: #1A6B5A;
    --color-accent-light: #2a8b73;
    --color-accent-bright: #3daa8c;
    --color-accent-glow: rgba(26, 107, 90, 0.4);
    --color-text: #e8e8e8;
    --color-text-muted: #9a9a9a;
    --color-text-dim: #6a6a6a;
    --color-border: #1f2a28;

    /* Typography */
    --font-mono: 'SF Mono', 'Menlo', 'Monaco', 'Consolas', monospace;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Layout */
    --max-width: 1200px;
    --nav-height: 60px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
}

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

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

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

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

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
}

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

.nav-logo {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-accent);
    text-decoration: none;
    letter-spacing: 2px;
}

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

.nav-links a {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

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

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    padding-top: calc(var(--nav-height) + var(--spacing-xl));
    background: radial-gradient(ellipse at center bottom, var(--color-accent-glow) 0%, transparent 60%);
}

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

/* Hero Icon with Radio Waves */
.hero-icon {
    position: relative;
    width: 200px;
    height: 200px;
    margin: 0 auto var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-icon img {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    box-shadow: 0 8px 40px var(--color-accent-glow);
    position: relative;
    z-index: 2;
}

/* Radio Wave Animation */
.radio-waves {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
}

.radio-waves span {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border: 2px solid var(--color-accent);
    border-radius: 50%;
    opacity: 0;
    animation: radio-pulse 3s ease-out infinite;
}

.radio-waves span:nth-child(1) {
    animation-delay: 0s;
}

.radio-waves span:nth-child(2) {
    animation-delay: 1s;
}

.radio-waves span:nth-child(3) {
    animation-delay: 2s;
}

@keyframes radio-pulse {
    0% {
        width: 120px;
        height: 120px;
        opacity: 0.5;
    }
    100% {
        width: 200px;
        height: 200px;
        opacity: 0;
    }
}

.hero h1 {
    font-family: var(--font-mono);
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 700;
    color: var(--color-accent);
    text-shadow: 0 0 40px var(--color-accent-glow);
    margin-bottom: var(--spacing-sm);
    letter-spacing: 2px;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 3vw, 1.5rem);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-lg);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 8px;
    transition: all var(--transition-fast);
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    background: var(--color-accent-light);
    transform: translateY(-2px);
    box-shadow: 0 4px 20px var(--color-accent-glow);
}

.btn-secondary {
    background: transparent;
    color: var(--color-accent);
    border: 2px solid var(--color-accent);
}

.btn-secondary:hover {
    background: rgba(240, 165, 0, 0.1);
}

.app-store-badges {
    margin-top: var(--spacing-md);
}

.coming-soon {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

/* Sections */
.section {
    padding: var(--spacing-xl) 0;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.section.visible {
    opacity: 1;
    transform: translateY(0);
}

.section-title {
    font-family: var(--font-mono);
    font-size: clamp(1.75rem, 5vw, 2.5rem);
    color: var(--color-accent);
    text-align: center;
    margin-bottom: var(--spacing-lg);
    letter-spacing: 1px;
}

.subsection-title {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

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

.story-content {
    max-width: 800px;
    margin: 0 auto;
}

.story-intro {
    font-size: 1.2rem;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

.story-text p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-muted);
}

.story-text strong {
    color: var(--color-accent);
}

.story-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.highlight {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm);
    background: var(--color-bg-card);
    border-radius: 8px;
    border: 1px solid var(--color-border);
}

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

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

.feature-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: var(--spacing-md);
    transition: all var(--transition-medium);
}

.feature-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

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

.feature-card h3 {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.feature-card p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

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

.diagram {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: var(--spacing-lg) var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    overflow-x: auto;
}

.diagram-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    min-width: max-content;
}

.diagram-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    text-align: center;
}

.diagram-icon {
    font-size: 2rem;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg);
    border: 2px solid var(--color-accent);
    border-radius: 50%;
}

.diagram-item span {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    max-width: 80px;
}

.diagram-arrow {
    color: var(--color-accent);
    font-size: 1.5rem;
    font-weight: bold;
}

.tnc-modes {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.tnc-mode {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: var(--spacing-md);
}

.tnc-mode h4 {
    font-family: var(--font-mono);
    color: var(--color-accent);
    margin-bottom: var(--spacing-xs);
}

.tnc-mode p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* Specs Section */
.specs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-sm);
}

.spec-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 8px;
}

.spec-label {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.spec-value {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--color-accent);
    text-align: right;
}

/* Getting Started Section */
.getting-started {
    background: var(--color-bg-secondary);
}

.requirements-list {
    list-style: none;
    max-width: 600px;
}

.requirements-list li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text-muted);
}

.requirements-list .check {
    color: var(--color-accent);
    font-weight: bold;
}

.setup-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: var(--spacing-md);
    max-width: 600px;
}

.setup-card h4 {
    font-family: var(--font-mono);
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

.setup-card p {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
}

.setup-steps {
    padding-left: var(--spacing-md);
    color: var(--color-text-muted);
}

.setup-steps li {
    padding: var(--spacing-xs) 0;
}

.setup-steps li::marker {
    color: var(--color-accent);
}

.info-link {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--color-bg-card);
    border-left: 3px solid var(--color-accent);
    border-radius: 0 8px 8px 0;
}

.info-link p {
    color: var(--color-text-muted);
}

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

.screenshots-wrapper {
    position: relative;
    padding: 0 var(--spacing-lg);
}

.screenshots-scroll {
    display: flex;
    gap: var(--spacing-md);
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scrollbar-width: none;
    -ms-overflow-style: none;
    padding: var(--spacing-sm) 0;
}

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

.screenshot-item {
    flex: 0 0 auto;
    scroll-snap-align: center;
    text-align: center;
}

.screenshot-item img {
    height: 500px;
    width: auto;
    border-radius: 24px;
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.5);
    border: 1px solid var(--color-border);
    transition: transform var(--transition-medium);
}

.screenshot-item img:hover {
    transform: scale(1.02);
}

.screenshot-item figcaption {
    margin-top: var(--spacing-sm);
    font-size: 0.9rem;
    color: var(--color-text-muted);
    max-width: 250px;
    margin-left: auto;
    margin-right: auto;
}

.screenshots-nav {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.screenshots-nav button {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid var(--color-border);
    background: var(--color-bg-card);
    color: var(--color-text);
    font-size: 1.2rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.screenshots-nav button:hover {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: white;
}

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

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

.footer-logo {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    color: var(--color-accent);
    letter-spacing: 2px;
}

.footer-brand p {
    color: var(--color-text-dim);
    font-size: 0.9rem;
}

.footer-contact a {
    color: var(--color-text-muted);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-contact a:hover {
    color: var(--color-accent);
}

.footer-signoff {
    text-align: center;
    padding-top: var(--spacing-md);
}

.footer-signoff p {
    font-family: var(--font-mono);
    color: var(--color-accent);
    font-size: 1.1rem;
    letter-spacing: 1px;
}

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

    .hero {
        padding-top: calc(var(--nav-height) + var(--spacing-lg));
    }

    .diagram-flow {
        flex-direction: column;
    }

    .diagram-arrow {
        transform: rotate(90deg);
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .screenshots-wrapper {
        padding: 0 var(--spacing-sm);
    }

    .screenshot-item img {
        height: 400px;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }

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

    .btn {
        width: 100%;
        max-width: 280px;
        text-align: center;
    }

    .spec-item {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }

    .spec-value {
        text-align: left;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .radio-waves span {
        animation: none;
    }

    .section {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .feature-card:hover,
    .btn-primary:hover {
        transform: none;
    }
}