:root {
    /* Premium Dark Theme Palette */
    --bg-primary: #0a0b10;
    --bg-secondary: #13151c;
    --bg-card: rgba(25, 28, 36, 0.6);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #6366f1;
    --accent-hover: #4f46e5;
    --success: #10b981;
    --border-light: rgba(255, 255, 255, 0.06);
    --glass-bg: rgba(10, 11, 16, 0.7);
    --hero-glow: rgba(99, 102, 241, 0.15);

    --font-main: 'Inter', system-ui, -apple-system, sans-serif;
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Glassmorphism Navigation */
.glass-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-light);
    padding: 16px 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.nav-links {
    display: none;
    gap: 32px;
}

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

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-family: var(--font-main);
}

.btn-primary {
    background-color: var(--accent);
    color: white;
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

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

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

.btn-large {
    padding: 14px 28px;
    font-size: 1.05rem;
    border-radius: var(--radius-md);
}

/* Hero Section */
.hero {
    position: relative;
    padding: 100px 0;
    text-align: center;
    overflow: hidden;
}

.hero-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--hero-glow) 0%, transparent 60%);
    pointer-events: none;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.badge {
    display: inline-block;
    padding: 6px 14px;
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.new-badge {
    background-color: rgba(99, 102, 241, 0.1);
    color: var(--accent);
    border: 1px solid rgba(99, 102, 241, 0.2);
}

.gradient-text {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    background: linear-gradient(to right, #ffffff, #94a3b8);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 500px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-top: 16px;
}

/* Store Main Section */
.store-main {
    flex: 1;
    padding-bottom: 80px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}

.section-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.view-all {
    color: var(--accent);
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
}

.view-all:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

/* App Grid */
.app-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.app-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.app-card:hover {
    transform: translateY(-4px);
    border-color: rgba(99, 102, 241, 0.3);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
}

.app-card-img {
    height: 160px;
    background-size: cover;
    background-position: center;
    position: relative;
}

.os-badges {
    position: absolute;
    top: 12px;
    right: 12px;
    display: flex;
    gap: 6px;
}

.os-badge {
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    color: white;
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: capitalize;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.app-card-content {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.app-title {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.app-developer {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.app-card-footer {
    margin-top: auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.app-price {
    font-weight: 700;
    font-size: 1.1rem;
}

.free-badge {
    color: var(--success);
}

.get-btn {
    background: rgba(255, 255, 255, 0.05);
    padding: 6px 16px;
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 600;
    transition: var(--transition);
    border: 1px solid transparent;
}

.app-card:hover .get-btn {
    background: var(--accent);
    color: white;
}

/* Footer */
.footer {
    border-top: 1px solid var(--border-light);
    padding: 40px 0;
    background: var(--bg-secondary);
    margin-top: auto;
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

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

.footer-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 8px;
}

.footer-links {
    display: flex;
    gap: 20px;
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: var(--transition);
}

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

/* --- App Details Page --- */
.details-main {
    flex: 1;
    padding: 40px 24px;
}

.details-header {
    display: flex;
    flex-direction: column;
    gap: 32px;
    margin-bottom: 40px;
}

@media (min-width: 900px) {
    .details-header {
        flex-direction: row;
        align-items: flex-start;
    }
}

.details-media {
    flex: 1;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border-light);
    background: #000;
    aspect-ratio: 16/9;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.details-media video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.details-sidebar {
    width: 100%;
    max-width: 360px;
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 32px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.details-title {
    font-size: 2rem;
    font-weight: 800;
    line-height: 1.1;
}

.details-dev {
    color: var(--accent);
    font-weight: 600;
    margin-top: 4px;
}

.details-price {
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.btn-block {
    width: 100%;
    padding: 16px;
    font-size: 1.1rem;
}

.details-meta {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding-top: 20px;
    border-top: 1px solid var(--border-light);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.meta-row {
    display: flex;
    justify-content: space-between;
}

.meta-val {
    color: var(--text-primary);
    font-weight: 500;
}

.details-body {
    max-width: 800px;
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 32px;
}

.details-body h2 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-light);
}

.description-content {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.7;
}

.description-content p {
    margin-bottom: 16px;
}

.description-content ul {
    margin-left: 24px;
    margin-bottom: 16px;
}

.description-content li {
    margin-bottom: 8px;
}