/* ============================================================
   TechTruthSeeker Content Template — lecture.css v1.0
   Loaded conditionally on pages with pageclass_sfx "lecture"
   ============================================================ */

/* ═══════════ LECTURE HERO ═══════════ */
.lecture-hero {
    text-align: center;
    padding: 4rem 0 3rem;
    position: relative;
    overflow: hidden;
}

.lecture-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(
        ellipse 60% 80% at 50% 40%,
        rgba(201,168,76,0.06) 0%,
        transparent 70%
    );
    pointer-events: none;
}

.lecture-breadcrumbs {
    font-size: 0.8rem;
    color: rgba(42,37,32,0.45);
    margin-bottom: 1.5rem;
    letter-spacing: 0.02em;
}
.lecture-breadcrumbs a {
    color: rgba(42,37,32,0.45);
    text-decoration: none;
}
.lecture-breadcrumbs a:hover {
    color: var(--gold);
}
.lecture-breadcrumbs .sep {
    margin: 0 0.4rem;
    opacity: 0.5;
}

.lecture-hero h1 {
    font-size: clamp(2.4rem, 5.5vw, 3.8rem);
    max-width: 18ch;
    margin-inline: auto;
    margin-bottom: 0.3em;
}

.lecture-subtitle {
    font-size: 1.15rem;
    color: rgba(42,37,32,0.6);
    max-width: 50ch;
    margin-inline: auto;
    margin-bottom: 1.5rem;
}

/* ── Lecture meta badge ── */
.lecture-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    font-size: 0.8rem;
    color: rgba(42,37,32,0.5);
    flex-wrap: wrap;
}

.lecture-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.3em 0.8em;
    border-radius: 999px;
    background: rgba(201,168,76,0.1);
    color: var(--gold-dk);
    font-weight: 500;
    font-size: 0.75rem;
    letter-spacing: 0.03em;
}
.lecture-badge--foundation {
    background: rgba(201,168,76,0.15);
}
.lecture-badge--advanced {
    background: rgba(160,120,48,0.12);
    color: var(--gold-dk);
}

/* ── Lecture illustration placeholder ── */
.lecture-illustration {
    max-width: 600px;
    margin: 2rem auto 0;
    aspect-ratio: 16/9;
    border-radius: var(--radius);
    overflow: hidden;
    border: var(--gold-border);
    background: var(--cream);
    position: relative;
}

/* ═══════════ TOC SIDEBAR (lectures) ═══════════ */
.lecture .content-grid {
    grid-template-columns: 1fr 240px;
    gap: 3rem;
}

.lecture-toc {
    font-size: 0.85rem;
    line-height: 1.5;
}

.lecture-toc-title {
    font-family: var(--body);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: rgba(42,37,32,0.4);
    margin-bottom: 0.75rem;
}

.lecture-toc ol {
    list-style: none;
    padding: 0;
    margin: 0;
}

.lecture-toc li {
    margin-bottom: 0.4rem;
}

.lecture-toc a {
    color: var(--text);
    text-decoration: none;
    display: block;
    padding: 0.3rem 0.75rem;
    border-left: 2px solid transparent;
    border-radius: 0 3px 3px 0;
    transition: all var(--transition);
}

.lecture-toc a:hover {
    color: var(--gold);
    border-left-color: rgba(201,168,76,0.3);
    background: rgba(201,168,76,0.04);
}

.lecture-toc a.active {
    color: var(--gold);
    border-left-color: var(--gold);
    font-weight: 500;
    background: rgba(201,168,76,0.06);
}

/* TOC collapse on mobile */
@media (max-width: 768px) {
    .lecture .content-grid {
        grid-template-columns: 1fr;
    }

    .lecture-toc {
        position: static;
        max-height: none;
        border: var(--gold-border);
        border-radius: var(--radius);
        padding: 1rem;
        margin-bottom: 1.5rem;
        background: var(--white);
    }
}

/* ═══════════ LECTURE BODY ENHANCEMENTS ═══════════ */
.lecture .content-body h2 {
    scroll-margin-top: calc(var(--header-h) + 1.5rem);
}

/* Key statement callout */
.key-statement {
    border: none;
    border-left: 3px solid var(--gold);
    background: linear-gradient(135deg,
        rgba(201,168,76,0.04) 0%,
        rgba(201,168,76,0.01) 100%);
    padding: 1.5rem 2rem;
    margin: 2rem 0;
    border-radius: 0 var(--radius) var(--radius) 0;
    font-size: 1.1rem;
    line-height: 1.6;
    color: var(--dark);
    font-style: normal;
    max-width: var(--max-w);
}
.key-statement strong {
    color: var(--gold-dk);
}

/* ═══════════ REFLECTION QUESTIONS ═══════════ */
.reflection {
    background: var(--white);
    border: var(--gold-border);
    border-radius: var(--radius);
    padding: 2rem;
    margin: 3rem 0;
    max-width: var(--max-w);
}

.reflection-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--body);
    font-weight: 600;
    font-size: 1rem;
    color: var(--dark);
    margin-bottom: 1rem;
}
.reflection-title::before {
    content: '💭';
    font-size: 1.2rem;
}

.reflection ol {
    padding-left: 1.25rem;
    max-width: none;
}
.reflection li {
    margin-bottom: 0.75rem;
    color: var(--text);
    font-size: 0.95rem;
}

/* ═══════════ FURTHER READING ═══════════ */
.further-reading {
    margin: 2.5rem 0;
    max-width: var(--max-w);
}
.further-reading h3 {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
}
.further-reading ul {
    list-style: none;
    padding: 0;
}
.further-reading li {
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(201,168,76,0.1);
}
.further-reading li:last-child { border-bottom: none; }
.further-reading a {
    font-weight: 500;
}
.further-reading .reading-type {
    font-size: 0.75rem;
    color: rgba(42,37,32,0.4);
    margin-left: 0.5rem;
}

/* ═══════════ COURSE MAP (on /lectures page) ═══════════ */
.course-map {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.25rem;
    margin: 2rem 0;
}

.course-node {
    background: var(--white);
    border: var(--gold-border);
    border-radius: var(--radius);
    padding: 1.25rem;
    text-decoration: none;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    transition: all var(--transition);
    position: relative;
}
.course-node:hover {
    border-color: rgba(201,168,76,0.6);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    text-decoration: none;
}

.course-node-number {
    font-family: var(--display);
    font-size: 2rem;
    color: rgba(201,168,76,0.2);
    line-height: 1;
    position: absolute;
    top: 0.75rem;
    right: 1rem;
}

.course-node-title {
    font-family: var(--display);
    font-size: 1.15rem;
    color: var(--dark);
    line-height: 1.25;
    padding-right: 2rem;
}

.course-node-desc {
    font-size: 0.85rem;
    color: rgba(42,37,32,0.6);
    line-height: 1.5;
}

.course-node-meta {
    font-size: 0.75rem;
    color: rgba(42,37,32,0.4);
    margin-top: auto;
    padding-top: 0.5rem;
}

/* Group headers for foundation / advanced */
.course-group {
    margin: 2.5rem 0 1rem;
}
.course-group-title {
    font-family: var(--display);
    font-size: 1.5rem;
    color: var(--dark);
    margin-bottom: 0.3em;
}
.course-group-desc {
    font-size: 0.95rem;
    color: rgba(42,37,32,0.6);
    max-width: var(--max-w);
}

/* ═══════════ LECTURE PROGRESS INDICATOR ═══════════ */
.lecture-progress {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    margin: 1rem 0;
    justify-content: center;
}
.lecture-progress-dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: rgba(201,168,76,0.2);
    transition: all var(--transition);
}
.lecture-progress-dot.completed {
    background: var(--gold);
}
.lecture-progress-dot.current {
    background: var(--gold);
    width: 24px;
    border-radius: 4px;
}