/* Dərs səhifələrinin ortaq komponentləri (ağ / qara / sarı-narıncı) */

html { scroll-behavior: smooth; }
body { font-family: 'Inter', sans-serif; background-color: #ffffff; color: #0a0a0a; }
section[id] { scroll-margin-top: 6rem; }
.hidden { display: none; }

.nav-link { color: #404040; font-weight: 500; white-space: nowrap; }
.nav-link:hover { color: #b45309; }

.section-card {
    background-color: #ffffff;
    border: 1px solid #e5e5e5;
    border-radius: 0.75rem;
    box-shadow: 0 1px 3px rgb(0 0 0 / 0.06);
    padding: 1.5rem;
    margin-bottom: 2rem;
}
.section-title {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    text-align: center;
}
.section-title .icon { color: #f59e0b; }
.lead { color: #404040; max-width: 48rem; margin: 0 auto 1.5rem; text-align: center; }

.tab-bar { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.5rem; margin-bottom: 1.5rem; }
.tab-btn {
    padding: 0.6rem 1.25rem;
    border-radius: 0.5rem;
    font-weight: 600;
    transition: background-color 0.2s, color 0.2s;
    cursor: pointer;
    white-space: nowrap;
}
.active-tab { background-color: #f59e0b; color: #0a0a0a; }
.inactive-tab { background-color: #f5f5f5; color: #404040; }
.inactive-tab:hover { background-color: #fef3c7; }

.code-block {
    background-color: #0a0a0a;
    color: #f5f5f5;
    border-left: 4px solid #f59e0b;
    border-radius: 0.5rem;
    padding: 1rem 1rem 1rem 1.25rem;
    position: relative;
    overflow-x: auto;
    margin-bottom: 1rem;
}
.code-block pre { margin: 0; padding-right: 5.5rem; }
.code-note { color: #a3a3a3; font-size: 0.875rem; margin-top: 0.75rem; }
.copy-btn {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    background-color: #262626;
    color: #ffffff;
    border: none;
    padding: 0.25rem 0.75rem;
    border-radius: 0.375rem;
    cursor: pointer;
    font-size: 0.875rem;
    transition: background-color 0.2s, color 0.2s;
}
.copy-btn:hover { background-color: #f59e0b; color: #0a0a0a; }

.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr)); gap: 1rem; }
.feature-item { display: flex; align-items: flex-start; gap: 0.75rem; }
.feature-item > .icon { color: #d97706; width: 1.5rem; height: 1.5rem; margin-top: 0.1rem; }

.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); gap: 1rem; }
.info-card { background: #fafafa; border: 1px solid #e5e5e5; border-radius: 0.6rem; padding: 1.25rem; }
.info-card.accent { background: #fffbeb; border-color: #fcd34d; }
.info-card.dark { background: #0a0a0a; border-color: #0a0a0a; }
.info-card.dark h3, .info-card.dark p { color: #f5f5f5; }
.info-card h3 { display: flex; align-items: center; gap: 0.5rem; font-weight: 700; font-size: 1.1rem; margin-bottom: 0.5rem; }
.info-card h3 .icon { color: #d97706; }
.info-card.dark h3 .icon { color: #fbbf24; }

.note-box {
    background: #fffbeb;
    border-left: 4px solid #f59e0b;
    padding: 1rem 1.25rem;
    border-radius: 0 0.5rem 0.5rem 0;
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
}
.note-box > .icon { color: #d97706; margin-top: 0.15rem; }

.table-wrap { overflow-x: auto; border: 1px solid #e5e5e5; border-radius: 0.5rem; }
.data-table { width: 100%; border-collapse: collapse; }
.data-table th, .data-table td { padding: 0.7rem 1rem; border-bottom: 1px solid #e5e5e5; text-align: left; vertical-align: top; }
.data-table tr:last-child td { border-bottom: none; }
.data-table thead tr { background: #f5f5f5; }
.data-table th { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.05em; font-weight: 700; }
.data-table td:first-child { font-weight: 600; }
.yes { color: #b45309; font-weight: 700; }
.no { color: #525252; font-weight: 700; }

.steps { counter-reset: step; list-style: none; padding: 0; }
.steps li { counter-increment: step; display: flex; gap: 0.75rem; margin-bottom: 0.75rem; }
.steps li::before {
    content: counter(step);
    background: #0a0a0a;
    color: #fbbf24;
    font-weight: 700;
    border-radius: 9999px;
    width: 1.75rem;
    height: 1.75rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.lesson-footer { border-top: 1px solid #e5e5e5; }
.lesson-footer a { color: #b45309; font-weight: 600; }

body.dark-mode .nav-link { color: #d4d4d4; }
body.dark-mode .section-card { border-color: #262626; }
body.dark-mode .steps li::before { background: #262626; }
body.dark-mode .lead { color: #d4d4d4; }
body.dark-mode .info-card { background: #262626 !important; border-color: #404040; }
body.dark-mode .info-card.accent { background: #2a2113 !important; border-color: #92400e; }
body.dark-mode .info-card.dark { background: #000000 !important; border-color: #404040; }
body.dark-mode .table-wrap, body.dark-mode .data-table th, body.dark-mode .data-table td { border-color: #333333; }
body.dark-mode .code-block { background-color: #000000; }
body.dark-mode .yes { color: #fbbf24; }
body.dark-mode .no { color: #a3a3a3; }
body.dark-mode .lesson-footer { border-color: #262626; }
body.dark-mode .lesson-footer a { color: #fbbf24; }

.lesson-badge {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    background: #0a0a0a;
    color: #fbbf24;
    padding: 0.25rem 0.6rem;
    border-radius: 9999px;
    white-space: nowrap;
}
body.dark-mode .lesson-badge { background: #262626; }

/* Lab bölməsi */
.lab-section { border-top: 4px solid #f59e0b; }
.lab-topology pre { line-height: 1.35; }
.lab-solution { border: 1px solid #e5e5e5; border-radius: 0.75rem; padding: 0.85rem 1rem; background: #fafafa; }
.lab-solution summary { cursor: pointer; font-weight: 700; color: #92400e; display: flex; align-items: center; gap: 0.5rem; list-style: none; }
.lab-solution summary::-webkit-details-marker { display: none; }
.lab-solution summary::after { content: '+'; margin-left: auto; font-size: 1.2rem; }
.lab-solution[open] summary::after { content: '−'; }
.lab-footer { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0.75rem; border-top: 1px solid #e5e5e5; padding-top: 1rem; }
.lab-done-btn { display: inline-flex; align-items: center; gap: 0.4rem; padding: 0.6rem 1.1rem; border-radius: 0.7rem; font-weight: 700; background: #0a0a0a; color: #ffffff; }
.lab-done-btn .icon { color: #fbbf24; }
.lab-done-btn:hover { background: #262626; }
.lab-done-btn.is-done { background: #f59e0b; color: #0a0a0a; }
.lab-done-btn.is-done .icon { color: #0a0a0a; }