/* ===== CSS Variables ===== */
:root {
    --color-bg: #0d1117;
    --color-bg-elevated: #161b22;
    --color-surface: #21262d;
    --color-border: #30363d;
    --color-text: #e6edf3;
    --color-text-muted: #8b949e;
    --color-accent: #58a6ff;
    --color-accent-warm: #f0883e;
    --color-accent-teal: #39d0ba;
    --font-serif: 'DM Serif Display', Georgia, serif;
    --font-sans: 'Outfit', system-ui, sans-serif;
    --max-width: 1100px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
}

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

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

body {
    font-family: var(--font-sans);
    font-weight: 400;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--color-accent-teal);
}

ul {
    list-style: none;
}

/* ===== Navigation ===== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(13, 17, 23, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

.nav-logo {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

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

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

.nav-links a {
    color: var(--color-text-muted);
    font-weight: 400;
    font-size: 0.95rem;
    padding: var(--spacing-xs) 0;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent-teal);
    transition: width 0.3s ease;
}

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

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-xl) var(--spacing-md);
    position: relative;
    overflow: hidden;
    background: 
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(56, 189, 248, 0.15), transparent),
        radial-gradient(ellipse 60% 40% at 80% 60%, rgba(240, 136, 62, 0.1), transparent);
}

.hero-content {
    text-align: center;
    z-index: 1;
}

.hero h1 {
    font-family: var(--font-serif);
    font-size: clamp(3rem, 10vw, 6rem);
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: var(--spacing-sm);
}

.hero h1 .accent {
    background: linear-gradient(135deg, var(--color-accent-teal), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
    font-weight: 300;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2rem;
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text);
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 500;
    border-radius: 50px;
    transition: all 0.3s ease;
    cursor: pointer;
}

.cta-button:hover {
    background: var(--color-text);
    color: var(--color-bg);
    border-color: var(--color-text);
}

.hero-decoration {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    border-radius: 50%;
    border: 1px solid var(--color-border);
    opacity: 0.3;
    animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.3; }
    50% { transform: translate(-50%, -50%) scale(1.1); opacity: 0.15; }
}

/* ===== About Section ===== */
.about {
    padding: var(--spacing-xl) var(--spacing-md);
    background: var(--color-bg-elevated);
    border-top: 1px solid var(--color-border);
}

.about-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.about h2 {
    font-family: var(--font-serif);
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-accent-warm);
}

.about p {
    color: var(--color-text-muted);
    font-size: 1.1rem;
    line-height: 1.8;
}

/* ===== Page Header ===== */
.page-header {
    padding: calc(var(--spacing-xl) + 60px) var(--spacing-md) var(--spacing-lg);
    text-align: center;
    background: 
        radial-gradient(ellipse 80% 50% at 50% 0%, rgba(56, 189, 248, 0.1), transparent);
}

.page-header h1 {
    font-family: var(--font-serif);
    font-size: clamp(2.5rem, 6vw, 4rem);
    margin-bottom: var(--spacing-xs);
}

.page-header p {
    color: var(--color-text-muted);
    font-size: 1.1rem;
}

/* ===== Apps Section ===== */
.apps-section {
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-xl);
    max-width: var(--max-width);
    margin: 0 auto;
}

.app-card {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--spacing-md);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    padding: var(--spacing-md);
    transition: border-color 0.3s ease;
}

.app-card:hover {
    border-color: var(--color-accent-teal);
}

.app-icon svg {
    width: 100px;
    height: 100px;
    display: block;
}

.app-info h2 {
    font-family: var(--font-serif);
    font-size: 2rem;
    margin-bottom: 0.25rem;
}

.app-subtitle {
    color: var(--color-accent-teal);
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.app-description {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
    max-width: 600px;
}

.app-features {
    margin-bottom: var(--spacing-md);
}

.app-features li {
    position: relative;
    padding-left: 1.5rem;
    color: var(--color-text-muted);
    margin-bottom: 0.5rem;
}

.app-features li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-accent-teal);
}

.app-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.app-store-badge svg {
    height: 40px;
    width: auto;
    transition: opacity 0.2s ease;
}

.app-store-badge:hover svg {
    opacity: 0.8;
}

.more-apps {
    text-align: center;
    padding: var(--spacing-lg) var(--spacing-md);
    color: var(--color-text-muted);
    font-style: italic;
}

/* ===== Privacy Section ===== */
.privacy-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-md) var(--spacing-xl);
}

.privacy-intro {
    font-size: 1.2rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

.privacy-section {
    margin-bottom: var(--spacing-lg);
}

.privacy-section h2 {
    font-family: var(--font-serif);
    font-size: 1.75rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-accent-teal);
}

.privacy-section.general h2 {
    color: var(--color-accent-warm);
}

.privacy-block {
    margin-bottom: var(--spacing-md);
}

.privacy-block h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.privacy-block p {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xs);
}

.privacy-block ul {
    margin-top: var(--spacing-xs);
}

.privacy-block li {
    position: relative;
    padding-left: 1.25rem;
    color: var(--color-text-muted);
    margin-bottom: 0.5rem;
}

.privacy-block li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-accent);
}

.privacy-block li strong {
    color: var(--color-text);
    font-weight: 500;
}

.contact-email {
    margin-top: var(--spacing-sm);
}

.contact-email a {
    font-size: 1.1rem;
    color: var(--color-accent);
}

/* ===== Footer ===== */
.footer {
    margin-top: auto;
    padding: var(--spacing-md);
    background: var(--color-bg-elevated);
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

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

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

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

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

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .nav {
        padding: var(--spacing-sm);
    }
    
    .nav-links {
        gap: var(--spacing-sm);
    }
    
    .app-card {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .app-icon {
        display: flex;
        justify-content: center;
    }
    
    .app-features li {
        text-align: left;
    }
    
    .app-actions {
        justify-content: center;
    }
    
    .footer {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-md: 1.5rem;
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .tagline {
        font-size: 1rem;
    }
}