/* PurposeLab Studio — Shared Styles */
:root {
    --primary: #1976D2;
    --primary-dark: #1565C0;
    --text: #1C1B1F;
    --text-secondary: #555;
    --text-muted: #888;
    --bg: #FAFAFA;
    --card-bg: #FFFFFF;
    --border: #E8E8E8;
    --green: #2E7D32;
    --radius: 12px;
    --max-width: 800px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    line-height: 1.7;
    color: var(--text);
    background: var(--bg);
}

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

a { color: var(--primary); text-decoration: none; font-weight: 500; }
a:hover { text-decoration: underline; }

/* Navigation */
.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
    gap: 12px;
}

.nav-brand {
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
}

.nav-brand:hover { text-decoration: none; }

.nav-links {
    display: flex;
    gap: 24px;
    list-style: none;
    flex-wrap: wrap;
}

.nav-links a {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
}

.nav-links a:hover { color: var(--primary); text-decoration: none; }
.nav-links a.active { color: var(--primary); }

/* Hero */
.hero {
    text-align: center;
    padding: 64px 0 48px;
}

.hero h1 {
    font-size: 36px;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--text);
}

.hero .subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-top: 12px;
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: background 0.2s;
}

.btn:hover { text-decoration: none; }

.btn-primary {
    background: var(--primary);
    color: #FFF;
}

.btn-primary:hover { background: var(--primary-dark); }

.btn-outline {
    border: 2px solid var(--border);
    color: var(--text);
    background: var(--card-bg);
}

.btn-outline:hover { border-color: var(--primary); color: var(--primary); }

/* Section */
.section {
    padding: 48px 0;
}

.section-title {
    font-size: 24px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 32px;
    color: var(--text);
}

/* Cards */
.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    margin-bottom: 20px;
}

/* Feature Grid */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}

.feature {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    text-align: center;
}

.feature-icon {
    font-size: 36px;
    margin-bottom: 12px;
}

.feature h3 {
    font-size: 16px;
    color: var(--text);
    margin-bottom: 8px;
}

.feature p {
    font-size: 14px;
    color: var(--text-secondary);
}

/* Screenshot Gallery */
.screenshots {
    display: flex;
    gap: 16px;
    overflow-x: auto;
    padding: 16px 0;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
}

.screenshots img {
    height: 400px;
    border-radius: 12px;
    scroll-snap-align: start;
    box-shadow: 0 2px 12px rgba(0,0,0,0.1);
    flex-shrink: 0;
}

/* Badges */
.badges {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 16px;
}

.badge {
    font-size: 13px;
    padding: 6px 14px;
    border-radius: 20px;
    font-weight: 500;
}

.badge-free { background: #E8F5E9; color: #2E7D32; }
.badge-offline { background: #E3F2FD; color: #1565C0; }
.badge-noad { background: #FFF3E0; color: #E65100; }
.badge-privacy { background: #F3E5F5; color: #7B1FA2; }

/* Blog */
.blog-list { list-style: none; }

.blog-item {
    border-bottom: 1px solid var(--border);
    padding: 24px 0;
}

.blog-item:last-child { border-bottom: none; }

.blog-item h3 { font-size: 18px; margin-bottom: 4px; }
.blog-item h3 a { color: var(--text); }
.blog-item h3 a:hover { color: var(--primary); }
.blog-item .meta { font-size: 13px; color: var(--text-muted); margin-bottom: 8px; }
.blog-item p { font-size: 15px; color: var(--text-secondary); }

/* Blog Article */
.article { padding: 48px 0; }
.article h1 { font-size: 32px; font-weight: 700; margin-bottom: 8px; }
.article .meta { font-size: 14px; color: var(--text-muted); margin-bottom: 32px; }
.article h2 { font-size: 22px; margin-top: 36px; margin-bottom: 12px; }
.article h3 { font-size: 18px; margin-top: 28px; margin-bottom: 8px; }
.article p { margin-bottom: 16px; color: var(--text-secondary); font-size: 16px; }
.article ul, .article ol { margin: 0 0 16px 24px; color: var(--text-secondary); }
.article li { margin-bottom: 8px; font-size: 16px; }
.article strong { color: var(--text); }
.article blockquote {
    border-left: 3px solid var(--primary);
    padding: 12px 20px;
    margin: 16px 0;
    background: #F5F5F5;
    border-radius: 0 8px 8px 0;
}
.article table { width: 100%; border-collapse: collapse; margin: 16px 0; }
.article th, .article td { padding: 10px 14px; border: 1px solid var(--border); font-size: 15px; text-align: left; }
.article th { background: #F5F5F5; font-weight: 600; color: var(--text); }
.article td { color: var(--text-secondary); }

/* Footer */
.footer {
    text-align: center;
    padding: 32px 0;
    border-top: 1px solid var(--border);
    margin-top: 48px;
}

.footer p { font-size: 13px; color: var(--text-muted); }
.footer a { color: var(--text-muted); }
.footer .footer-links { margin-top: 8px; }
.footer .footer-links a { margin: 0 12px; }

/* CTA */
.cta {
    text-align: center;
    padding: 48px 24px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin: 32px 0;
}

.cta h2 { font-size: 24px; margin-bottom: 12px; }
.cta p { color: var(--text-secondary); margin-bottom: 24px; }

/* Responsive */
@media (max-width: 600px) {
    .hero h1 { font-size: 28px; }
    .hero .subtitle { font-size: 16px; }
    .nav { flex-direction: column; align-items: flex-start; }
    .nav-links { gap: 16px; }
    .screenshots img { height: 300px; }
    .features { grid-template-columns: 1fr; }
    .btn { width: 100%; justify-content: center; }
}