/* ═══════════════════════════════════════════
   notes.css — Dersler Listesi Sayfası
   site.css zaten nav/footer/lang/animations içerir.
   ═══════════════════════════════════════════ */

/* ── Hero ── */
.notes-hero { background: var(--navy); padding: 80px 5%; }
.notes-hero-inner { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 3rem; }
.notes-title { font-family: 'DM Serif Display', serif; font-size: clamp(2.2rem, 4vw, 3.4rem); color: white; letter-spacing: -0.03em; line-height: 1.1; margin-bottom: 1rem; }
.notes-sub { font-size: 1rem; color: rgba(255,255,255,0.55); font-weight: 300; max-width: 520px; line-height: 1.7; }
.stats-row { display: flex; gap: 2.5rem; }
.stat-item { text-align: center; }
.stat-n { font-family: 'DM Serif Display', serif; font-size: 2.4rem; color: var(--gold); letter-spacing: -0.04em; }
.stat-l { font-size: 0.72rem; color: rgba(255,255,255,0.4); letter-spacing: 0.06em; text-transform: uppercase; margin-top: 2px; }

/* ── Controls ── */
.controls { max-width: 1200px; margin: 0 auto; padding: 40px 5% 0; display: flex; gap: 1rem; flex-wrap: wrap; align-items: center; justify-content: space-between; }
.filter-group { display: none; }
.filter-btn { padding: 7px 14px; border: 1.5px solid var(--border); border-radius: 100px; font-size: 0.75rem; font-weight: 600; cursor: pointer; background: var(--bg-card); color: var(--text-muted); transition: all 0.2s; font-family: 'DM Sans', sans-serif; letter-spacing: 0.04em; }
.filter-btn.active, .filter-btn:hover { background: var(--navy); color: white; border-color: var(--navy); }
.search-wrap { position: relative; }
.search-wrap svg { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); color: var(--text-muted); pointer-events: none; }
#searchInput { padding: 9px 16px 9px 36px; border: 1.5px solid var(--border); border-radius: 100px; font-size: 0.82rem; background: var(--bg-card); color: var(--text); font-family: 'DM Sans', sans-serif; outline: none; width: 220px; transition: border-color 0.2s; }
#searchInput:focus { border-color: var(--navy); }
#resultCount { font-size: 0.75rem; color: var(--text-muted); padding: 0 5%; max-width: 1200px; margin: 12px auto 0; }

/* ── Grid ── */
.lessons-section { max-width: 1200px; margin: 0 auto; padding: 24px 5% 0; }
.lessons-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; }
.lesson-card { background: var(--bg-card); border: 1.5px solid var(--border); border-radius: 14px; padding: 1.4rem 1.6rem; text-decoration: none; color: inherit; display: flex; flex-direction: column; gap: 0.5rem; transition: all 0.25s; position: relative; overflow: hidden; }
.lesson-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px; background: var(--gold); transform: scaleX(0); transition: transform 0.3s; transform-origin: left; }
.lesson-card:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(15,34,72,0.1); border-color: transparent; }
.lesson-card:hover::before { transform: scaleX(1); }
.lesson-card.hidden { display: none; }
.card-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 0.3rem; }
.lesson-num { font-size: 0.68rem; font-weight: 700; letter-spacing: 0.1em; color: var(--text-muted); text-transform: uppercase; }
.lesson-cat { font-size: 0.62rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; padding: 2px 8px; border-radius: 20px; }
.lesson-title { font-family: 'DM Serif Display', serif; font-size: 1rem; color: var(--navy); line-height: 1.35; }
.lesson-desc { font-size: 0.78rem; color: var(--text-muted); line-height: 1.6; font-weight: 300; flex: 1; }
.card-arrow { font-size: 0.85rem; color: var(--gold); margin-top: 0.3rem; transition: transform 0.2s; }
.lesson-card:hover .card-arrow { transform: translateX(4px); }

/* ── Sections ── */
.section-divider { max-width: 1200px; margin: 48px auto 0; padding: 0 5%; }
.section-divider h2 { font-family: 'DM Serif Display', serif; font-size: 1.3rem; color: var(--navy); padding-bottom: 12px; border-bottom: 1.5px solid var(--border); margin-bottom: 20px; display: flex; align-items: center; gap: 12px; }
.section-divider h2 span { font-size: 0.7rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--gold); background: rgba(201,168,76,0.1); padding: 3px 10px; border-radius: 20px; }

/* ── Notes footer margin ── */
footer { margin-top: 80px; }

/* ── Notes Responsive ── */
@media (max-width: 900px) {
    .notes-hero-inner { grid-template-columns: 1fr; }
    .lessons-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 540px) {
    .lessons-grid { grid-template-columns: 1fr; }
}