/* === SUPERVISION PAGE STYLING === */

:root {
    --sup-primary: #084c8b;
    --sup-secondary: #063a6b;
    --sup-white: #ffffff;
    --sup-text-dark: #2c3e50;
    --sup-text-muted: #6c757d;
    --sup-border: #e9ecef;
    --sup-shadow: 0 4px 12px rgba(0,0,0,0.08);
    --sup-shadow-hover: 0 8px 20px rgba(0,0,0,0.14);
    --sup-gradient: linear-gradient(135deg, var(--sup-primary) 0%, var(--sup-secondary) 100%);
    --sup-radius: 12px;
    --sup-transition: all 0.25s ease;
}

/* Header */
.supervision-header {
    background: var(--sup-gradient);
    color: var(--sup-white);
    padding: 26px 20px 22px;
    margin-bottom: 24px;
    text-align: center;
    border-radius: 0 0 var(--sup-radius) var(--sup-radius);
}
.supervision-header-content { max-width: 820px; margin: 0 auto; }
.supervision-header .header-icon { font-size: 1.9rem; margin-bottom: 4px; opacity: 0.95; }
.supervision-title { font-size: 1.95rem; font-weight: 700; margin-bottom: 6px; letter-spacing: -0.5px; }
.supervision-subtitle { font-size: 1.02rem; opacity: 0.9; line-height: 1.5; margin: 0 auto; max-width: 640px; }

/* Content */
.supervision-content { max-width: 1080px; margin: 0 auto 40px; padding: 0 20px; }

.level-section { margin-bottom: 40px; }
.level-title {
    display: flex; align-items: center; flex-wrap: wrap; gap: 12px;
    font-size: 1.5rem; font-weight: 700; color: var(--sup-text-dark);
    border-left: 4px solid var(--sup-primary); padding-left: 12px; margin-bottom: 18px;
}
.level-count {
    font-size: 0.85rem; font-weight: 600; color: var(--sup-primary);
    background: rgba(8,76,139,0.08); padding: 3px 12px; border-radius: 20px;
}

/* Year sub-heading (M.Tech / B.Tech grouping) */
.sup-year {
    font-size: 1.05rem; font-weight: 600; color: var(--sup-primary);
    margin: 20px 0 10px;
    padding-bottom: 4px;
    border-bottom: 2px solid rgba(8,76,139,0.15);
}
.sup-year:first-child { margin-top: 4px; }

/* Line-by-line list */
.sup-list {
    list-style: decimal;
    margin: 0 0 8px;
    padding-left: 1.4em;
}

.sup-row {
    padding: 10px 0;
    border-bottom: 1px solid var(--sup-border);
}
.sup-row:last-child { border-bottom: none; }

.sup-row-head {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 4px 10px;
}

.sup-name { font-size: 1rem; font-weight: 700; color: var(--sup-text-dark); }

.sup-row-meta { font-size: 0.88rem; color: var(--sup-text-muted); }
.sup-row-meta .sep { color: var(--sup-border); margin: 0 2px; }

.sup-thesis { font-size: 0.92rem; color: var(--sup-text-dark); line-height: 1.5; margin: 4px 0 0; }
.sup-thesis .lbl { font-weight: 600; color: var(--sup-primary); }

.sup-affil { font-size: 0.85rem; color: var(--sup-text-muted); margin: 4px 0 0; display: flex; align-items: flex-start; gap: 6px; }
.sup-affil i { margin-top: 2px; flex-shrink: 0; }

/* Completed toggle (mirrors the collapsible pattern on AAI Lab -> People) */
.sup-collapse-btn {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    margin-top: 14px;
    padding: 10px 16px;
    background: #f8f9fa;
    border: 1px solid var(--sup-border);
    border-radius: 8px;
    color: var(--sup-text-dark);
    font-weight: 600;
    font-size: 0.92rem;
    text-align: left;
    cursor: pointer;
    transition: var(--sup-transition);
}
.sup-collapse-btn:hover { background: #eef1f4; border-color: #ced4da; }
.sup-collapse-btn[aria-expanded="true"] {
    background: rgba(8,76,139,0.06);
    border-color: var(--sup-primary);
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
}
.sup-collapse-label { display: inline-flex; align-items: center; gap: 8px; }
.sup-collapse-count {
    background: rgba(8,76,139,0.1); color: var(--sup-primary);
    font-size: 0.78rem; font-weight: 700;
    padding: 2px 9px; border-radius: 20px;
}
.sup-collapse-caret { transition: transform 0.25s ease; color: var(--sup-primary); }
.sup-collapse-btn[aria-expanded="true"] .sup-collapse-caret { transform: rotate(180deg); }

.sup-collapse-body {
    padding: 12px 16px 4px;
    border: 1px solid var(--sup-primary);
    border-top: none;
    border-bottom-left-radius: 8px;
    border-bottom-right-radius: 8px;
}

.supervision-empty { text-align: center; color: var(--sup-text-muted); padding: 60px 20px; }

@media (max-width: 768px) {
    .supervision-header { padding: 20px 15px 18px; }
    .supervision-title { font-size: 1.6rem; }
    .supervision-subtitle { font-size: 0.95rem; }
    .level-title { font-size: 1.3rem; }
    .sup-list { padding-left: 1.2em; }
}

@media (prefers-reduced-motion: reduce) {
    .sup-collapse-caret { transition: none; }
}