/* ============================================================
   CTEC EAD - Vitrine (Public Storefront)
   ============================================================ */

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ─── HEADER ────────────────────────────────────────────── */
.site-header {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    gap: 24px;
}
.header-logo img { height: 36px; }
.logo-text { font-size: 1.5rem; font-weight: 800; color: var(--primary); }
.header-nav { display: flex; gap: 24px; }
.header-nav a { color: var(--text-secondary); font-weight: 500; font-size: 0.9rem; transition: color var(--transition); }
.header-nav a:hover { color: var(--primary); }
.header-actions { display: flex; align-items: center; gap: 8px; }
.btn-mobile-menu { display: none; background: none; border: none; font-size: 1.3rem; cursor: pointer; color: var(--text-primary); padding: 8px; }

@media (max-width: 768px) {
    .header-nav { display: none; position: absolute; top: 64px; left: 0; right: 0; background: var(--bg-card); flex-direction: column; padding: 16px 20px; border-bottom: 1px solid var(--border); box-shadow: var(--shadow-md); }
    .header-nav.open { display: flex; }
    .btn-mobile-menu { display: block; }
    .header-actions .btn { display: none; }
    .header-actions .btn:last-child { display: inline-flex; }
}

/* ─── HERO ──────────────────────────────────────────────── */
.hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: #fff;
    padding: 80px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='40' height='40' viewBox='0 0 40 40' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M20 20.5V18H0v-2h20v-2h2v2h18v2H22v2.5L20 20.5z'/%3E%3C/g%3E%3C/svg%3E") repeat;
}
.hero-content { position: relative; z-index: 1; max-width: 700px; margin: 0 auto; }
.hero h1 { font-size: 2.5rem; font-weight: 800; margin-bottom: 16px; }
.hero p { font-size: 1.15rem; opacity: 0.9; margin-bottom: 32px; line-height: 1.6; }
.hero .btn { padding: 14px 36px; font-size: 1.05rem; border-radius: var(--radius-lg); }

/* ─── SECTION ───────────────────────────────────────────── */
.section { padding: 64px 0; }
.section-header { text-align: center; margin-bottom: 40px; }
.section-header h2 { font-size: 1.75rem; margin-bottom: 8px; }
.section-header p { color: var(--text-muted); font-size: 1rem; max-width: 600px; margin: 0 auto; }

/* ─── COURSE CARDS ──────────────────────────────────────── */
.courses-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; }
.course-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: transform var(--transition), box-shadow var(--transition);
}
.course-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.course-card-img { position: relative; padding-top: 56.25%; background: var(--border-light); overflow: hidden; }
.course-card-img img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.course-card-badge {
    position: absolute; top: 12px; left: 12px; padding: 4px 12px; border-radius: var(--radius-full);
    font-size: 0.7rem; font-weight: 600; background: var(--primary); color: #fff;
}
.course-card-badge.free { background: var(--success); }
.course-card-body { padding: 16px; }
.course-card-category { font-size: 0.7rem; text-transform: uppercase; color: var(--primary); font-weight: 600; letter-spacing: 0.03em; margin-bottom: 6px; }
.course-card-title { font-size: 1rem; font-weight: 600; margin-bottom: 8px; line-height: 1.4; color: var(--text-primary); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.course-card-meta { display: flex; align-items: center; gap: 12px; font-size: 0.8rem; color: var(--text-muted); margin-bottom: 12px; }
.course-card-rating { display: flex; align-items: center; gap: 4px; }
.course-card-rating i { color: var(--accent); font-size: 0.7rem; }
.course-card-footer { display: flex; align-items: center; justify-content: space-between; padding-top: 12px; border-top: 1px solid var(--border-light); }
.course-card-price { font-size: 1.15rem; font-weight: 700; color: var(--primary); }
.course-card-price .original { font-size: 0.8rem; color: var(--text-muted); text-decoration: line-through; font-weight: 400; margin-right: 6px; }
.course-card-price.free { color: var(--success); }

/* ─── PROFESSOR CARDS ───────────────────────────────────── */
.professors-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 24px; }
.professor-card { text-align: center; padding: 32px 20px; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); }
.professor-card img { width: 96px; height: 96px; border-radius: 50%; object-fit: cover; margin-bottom: 16px; }
.professor-card h4 { margin-bottom: 4px; }
.professor-card p { color: var(--text-muted); font-size: 0.85rem; }

/* ─── TESTIMONIALS ──────────────────────────────────────── */
.testimonials-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 24px; }
.testimonial-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 24px; }
.testimonial-card .stars { color: var(--accent); margin-bottom: 12px; }
.testimonial-card blockquote { font-style: italic; color: var(--text-secondary); line-height: 1.6; margin-bottom: 16px; font-size: 0.9rem; }
.testimonial-card .author { display: flex; align-items: center; gap: 12px; }
.testimonial-card .author img { width: 40px; height: 40px; border-radius: 50%; object-fit: cover; }
.testimonial-card .author-name { font-weight: 600; font-size: 0.875rem; }
.testimonial-card .author-role { font-size: 0.75rem; color: var(--text-muted); }

/* ─── STATS BAR ─────────────────────────────────────────── */
.stats-bar { background: var(--bg-card); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); padding: 40px 0; }
.stats-bar-grid { display: flex; justify-content: center; gap: 60px; text-align: center; flex-wrap: wrap; }
.stats-bar-item h3 { font-size: 2rem; font-weight: 800; color: var(--primary); }
.stats-bar-item p { font-size: 0.875rem; color: var(--text-muted); }

/* ─── CTA ───────────────────────────────────────────────── */
.cta-section { background: linear-gradient(135deg, var(--primary), var(--secondary)); padding: 64px 0; text-align: center; color: #fff; }
.cta-section h2 { font-size: 2rem; margin-bottom: 12px; }
.cta-section p { font-size: 1.05rem; opacity: 0.9; margin-bottom: 24px; }
.cta-section .btn { background: #fff; color: var(--primary); font-weight: 700; padding: 14px 36px; font-size: 1rem; }
.cta-section .btn:hover { background: #f0f0f0; color: var(--primary); }

/* ─── FOOTER ────────────────────────────────────────────── */
.site-footer { background: #111827; color: rgba(255,255,255,0.7); padding: 48px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px; }
.footer-col h4 { color: #fff; font-size: 0.9rem; margin-bottom: 16px; }
.footer-col a { display: block; color: rgba(255,255,255,0.6); font-size: 0.85rem; margin-bottom: 8px; transition: color var(--transition); }
.footer-col a:hover { color: #fff; }
.footer-social { display: flex; gap: 12px; margin-top: 12px; }
.footer-social a { font-size: 1.2rem; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 20px 0; text-align: center; font-size: 0.8rem; color: rgba(255,255,255,0.4); }

@media (max-width: 768px) {
    .hero { padding: 48px 0; }
    .hero h1 { font-size: 1.75rem; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .stats-bar-grid { gap: 32px; }
}
@media (max-width: 480px) {
    .footer-grid { grid-template-columns: 1fr; }
}