:root {
    --teaching-ink: #153243;
    --teaching-accent: #0b6e4f;
    --teaching-accent-soft: #dff5ea;
    --teaching-warm: #f6efe5;
    --teaching-border: rgba(21, 50, 67, 0.12);
    --teaching-shadow: 0 18px 40px rgba(21, 50, 67, 0.08);
}

.article-content .teaching-hero,
.article-content .course-hero {
    position: relative;
    padding: 28px 32px;
    margin-bottom: 28px;
    border: 1px solid var(--teaching-border);
    border-radius: 22px;
    background:
        radial-gradient(circle at top right, rgba(11, 110, 79, 0.10), transparent 32%),
        linear-gradient(135deg, #ffffff 0%, #fbf8f3 100%);
    box-shadow: var(--teaching-shadow);
}

.teaching-eyebrow {
    margin: 0 0 10px;
    color: var(--teaching-accent);
    font-size: 12px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    font-weight: 700;
}

.article-content .teaching-hero h2,
.article-content .course-hero h2 {
    margin: 0 0 14px;
    color: var(--teaching-ink);
    font-size: 34px;
    line-height: 1.15;
}

.teaching-intro {
    margin: 0;
    color: #3a4a56;
    font-size: 17px;
    line-height: 1.8;
}

.teaching-list-group {
    margin: 18px 0 0;
    border-top: 1px solid var(--teaching-border);
}

.teaching-list-item {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 18px;
    padding: 20px 0;
    border-bottom: 1px solid var(--teaching-border);
    color: inherit;
    text-decoration: none;
    transition: background-color 0.2s ease, padding-left 0.2s ease;
}

.teaching-list-item:hover {
    padding-left: 8px;
    text-decoration: none;
    background: rgba(11, 110, 79, 0.03);
}

.teaching-list-item__tag,
.teaching-list-item__meta {
    display: inline-block;
    font-size: 12px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.teaching-list-item__tag {
    margin-bottom: 14px;
    padding: 6px 10px;
    border-radius: 999px;
    background: var(--teaching-accent-soft);
    color: var(--teaching-accent);
    font-weight: 700;
}

.teaching-list-item__main {
    min-width: 0;
}

.teaching-list-item__main h4 {
    margin: 0 0 10px;
    color: var(--teaching-ink);
    font-size: 24px;
    line-height: 1.25;
}

.teaching-list-item__main p {
    margin: 0 0 18px;
    color: #475a67;
    line-height: 1.75;
}

.teaching-list-item__meta {
    flex: 0 0 auto;
    margin-top: 6px;
    color: #6f7f89;
    font-weight: 600;
    white-space: nowrap;
}

.teaching-section,
.teaching-note,
.course-meta,
.course-outline {
    margin: 28px 0;
}

.teaching-section h3,
.course-outline h3 {
    margin-bottom: 14px;
    color: var(--teaching-ink);
}

.teaching-list li {
    margin-bottom: 8px;
}

.teaching-note {
    padding: 16px 18px;
    border-left: 4px solid var(--teaching-accent);
    background: var(--teaching-warm);
    border-radius: 0 14px 14px 0;
}

.course-actions {
    margin-top: 20px;
}

.course-backlink {
    display: inline-block;
    padding: 10px 14px;
    border-radius: 999px;
    background: var(--teaching-ink);
    color: #fff;
    text-decoration: none;
    font-weight: 700;
}

.course-backlink:hover {
    color: #fff;
    text-decoration: none;
    opacity: 0.92;
}

.course-meta {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.course-meta__item {
    padding: 18px 18px 16px;
    border: 1px solid var(--teaching-border);
    border-radius: 18px;
    background: #fff;
}

.course-meta__label {
    display: block;
    margin-bottom: 8px;
    font-size: 12px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--teaching-accent);
    font-weight: 700;
}

.course-meta__value {
    color: var(--teaching-ink);
    line-height: 1.7;
}

.lecture-card {
    position: relative;
    padding: 22px 22px 18px;
    margin-bottom: 16px;
    border: 1px solid var(--teaching-border);
    border-radius: 18px;
    background: linear-gradient(180deg, #ffffff 0%, #fcfcfa 100%);
}

.lecture-card__week {
    display: inline-block;
    margin-bottom: 12px;
    padding: 6px 10px;
    border-radius: 999px;
    background: #edf4ff;
    color: #2f5f95;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.lecture-card h4 {
    margin: 0 0 10px;
    color: var(--teaching-ink);
    font-size: 22px;
    line-height: 1.3;
}

.lecture-card p {
    margin: 0 0 10px;
    color: #465661;
    line-height: 1.75;
}

.lecture-card p:last-child {
    margin-bottom: 0;
}

@media (max-width: 768px) {
    .article-content .teaching-hero,
    .article-content .course-hero {
        padding: 22px 18px;
        border-radius: 18px;
    }

    .article-content .teaching-hero h2,
    .article-content .course-hero h2 {
        font-size: 28px;
    }

    .course-meta {
        grid-template-columns: 1fr;
    }

    .course-meta__item,
    .lecture-card {
        padding: 18px;
    }

    .teaching-list-item {
        display: block;
        padding: 18px 0;
    }

    .teaching-list-item__meta {
        display: block;
        margin-top: 4px;
        white-space: normal;
    }

    .lecture-card h4 {
        font-size: 20px;
    }
}