:root {
    --bg: #ffffff;
    --text: #111111;
    --text-sec: #666666;
    --accent: #007aff;
    --card-bg: #f5f5f7;
    --container-width: 900px;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #000000;
        --text: #ffffff;
        --text-sec: #888888;
        --accent: #0a84ff;
        --card-bg: #1c1c1e;
    }
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
header {
    padding: 40px 0;
}

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

.logo {
    font-weight: 800;
    font-size: 24px;
    letter-spacing: -0.5px;
}

/* Hero */
.hero {
    padding: 60px 0;
}

h1 {
    font-size: 48px;
    font-weight: 800;
    letter-spacing: -1.5px;
    line-height: 1.1;
    margin-bottom: 24px;
}

.highlight {
    color: var(--accent);
}

.subtitle {
    font-size: 20px;
    color: var(--text-sec);
    max-width: 600px;
}

/* Apps Grid */
.apps {
    padding-bottom: 60px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 24px;
}

.app-card {
    background: var(--card-bg);
    border-radius: 32px;
    padding: 40px 24px;
    text-decoration: none;
    color: inherit;
    transition: transform 0.2s cubic-bezier(0.2, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.app-card:hover {
    transform: scale(1.03);
}

.app-card img {
    width: 80px;
    height: 80px;
    border-radius: 18px;
    margin-bottom: 20px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
}

.app-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 12px;
}

.badge {
    background: var(--bg);
    color: var(--accent);
    padding: 4px 12px;
    border-radius: 100px;
    font-size: 11px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Social Footer */
.social-footer {
    padding: 40px 0;
    border-top: 1px solid var(--card-bg);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 32px;
}

.social-links a {
    color: var(--text);
    font-size: 24px;
    transition: color 0.2s, transform 0.2s;
}

.social-links a:hover {
    color: var(--accent);
    transform: translateY(-3px);
}

/* App Detail Styles */
.app-detail {
    padding: 60px 0;
}

.detail-header {
    display: flex;
    align-items: center;
    gap: 32px;
    margin-bottom: 48px;
}

.detail-header img {
    width: 120px;
    height: 120px;
    border-radius: 28px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.detail-info h1 {
    font-size: 40px;
    margin-bottom: 8px;
}

.app-screenshot-container {
    background: var(--card-bg);
    border-radius: 40px;
    padding: 40px;
    text-align: center;
    margin-bottom: 48px;
}

.app-screenshot-container img {
    max-width: 100%;
    max-height: 600px;
    border-radius: 20px;
}

.features-list {
    margin-bottom: 48px;
}

.features-list h2 {
    font-size: 24px;
    margin-bottom: 20px;
}

.features-list ul {
    list-style: none;
}

.features-list li {
    font-size: 18px;
    margin-bottom: 12px;
    padding-left: 28px;
    position: relative;
}

.features-list li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: bold;
}

.download-btn {
    display: inline-block;
    background: var(--accent);
    color: white;
    padding: 16px 32px;
    border-radius: 100px;
    text-decoration: none;
    font-weight: 700;
    font-size: 18px;
    transition: transform 0.2s;
}

.download-btn:hover {
    transform: translateY(-2px);
}

.secondary-links {
    margin-top: 40px;
    display: flex;
    gap: 24px;
}

.secondary-links a {
    color: var(--text-sec);
    text-decoration: none;
    font-size: 14px;
}

/* Footer */
footer {
    padding: 60px 0;
    text-align: center;
}

footer p {
    font-size: 14px;
    color: var(--text-sec);
}

@media (max-width: 600px) {
    h1 {
        font-size: 36px;
    }
    .hero {
        padding: 40px 0;
    }
    .detail-header {
        flex-direction: column;
        text-align: center;
        gap: 20px;
    }
    .detail-header img {
        width: 100px;
        height: 100px;
    }
    .detail-info h1 {
        font-size: 32px;
    }
}