/* ═══════════════════════════════════════════
   FKG Sözlük — Dersler Page Styles
   ═══════════════════════════════════════════ */

.ders-breadcrumb {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 28px;
    flex-wrap: wrap;
}

.ders-page-title {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text-1);
}

.ders-crumb {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--accent);
    cursor: pointer;
    transition: opacity var(--t-fast) var(--ease);
}

.ders-crumb:hover {
    opacity: 0.7;
}

.ders-crumb-sep {
    color: var(--text-3);
    font-size: 1.1rem;
    user-select: none;
}

.ders-crumb-active {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-1);
}

/* ── Cards Grid — centered with 3 per row ── */
.ders-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
    max-width: 1040px;
    margin: 40px auto 0;
}

/* ── Cards — same style as topic-card preview boxes ── */
.ders-card {
    width: 320px;
    background: var(--surface);
    border-radius: var(--r-xl);
    border: 1px solid var(--border);
    padding: 32px;
    box-shadow: var(--shadow-sm);
    transition: transform var(--t-normal) var(--ease-out),
        box-shadow var(--t-normal) var(--ease-out),
        border-color var(--t-normal) var(--ease);
    cursor: pointer;
    position: relative;
    animation: fadeInUp var(--t-slow) var(--ease-out) backwards;
    overflow-wrap: break-word;
    word-wrap: break-word;
    display: flex;
    flex-direction: column;
    text-align: left;
}

.ders-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--border-strong);
}

/* Stagger animation */
.ders-card:nth-child(1) {
    animation-delay: 0ms;
}

.ders-card:nth-child(2) {
    animation-delay: 60ms;
}

.ders-card:nth-child(3) {
    animation-delay: 120ms;
}

.ders-card:nth-child(4) {
    animation-delay: 180ms;
}

.ders-card:nth-child(5) {
    animation-delay: 240ms;
}

.ders-card:nth-child(n+6) {
    animation-delay: 300ms;
}

.ders-card-lesson {
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 6px;
    display: inline-block;
}

.ders-card-name {
    font-size: 1.3rem;
    font-weight: 650;
    margin-bottom: 10px;
    color: var(--text-1);
    letter-spacing: -0.01em;
    line-height: 1.3;
}

.ders-card-desc {
    color: var(--text-2);
    font-size: 0.88rem;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 16px;
    flex: 1;
}

.ders-card-meta {
    font-size: 0.9rem;
    color: var(--text-3);
    display: flex;
    align-items: center;
    gap: 8px;
}

.ders-card-meta svg {
    flex-shrink: 0;
}

.topic-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: auto;
    padding-top: 12px;
    border-top: 1px solid var(--border-light);
}

.stat-item {
    font-size: 0.75rem;
    color: var(--text-3);
    display: flex;
    align-items: center;
    gap: 5px;
    white-space: nowrap;
}

/* Empty state */
.ders-empty {
    width: 100%;
    text-align: center;
    padding: 64px 24px;
    color: var(--text-3);
    font-size: 1rem;
}

/* Loading state in grid */
.ders-grid .loading-state {
    width: 100%;
}

/* ── Responsive ── */
@media (max-width: 1080px) {
    .ders-card {
        width: 300px;
    }

    .ders-grid {
        max-width: 960px;
    }
}

@media (max-width: 768px) {
    .ders-card {
        width: 100%;
    }

    .ders-grid {
        gap: 14px;
    }

    .ders-card-name {
        font-size: 1.15rem;
    }
}