/* ══════════════════════════════════════════════════════════════
   CalendarUI — 공통 달력 스타일
   /study, /operation(강의), /coach, /head, /member 에서 재사용
   ══════════════════════════════════════════════════════════════ */

/* ── Navigation ───────────────────────────────────────────── */
.cal-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    margin-bottom: var(--space-3);
}

.cal-nav .page-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-bg);
    cursor: pointer;
    font-size: var(--text-md);
    color: var(--color-text-sub);
    font-family: inherit;
    transition: all var(--transition-fast);
}
.cal-nav .page-btn:hover { background: var(--color-bg-subtle); }

.cal-month-label {
    font-size: var(--text-lg);
    font-weight: var(--font-extrabold);
    min-width: 120px;
    text-align: center;
}

.cal-nav .page-today {
    font-size: var(--text-sm);
    color: var(--color-primary);
    font-weight: var(--font-bold);
    cursor: pointer;
    background: none;
    border: none;
    font-family: inherit;
}
.cal-nav .page-today:hover { text-decoration: underline; }

/* ── Calendar Grid ────────────────────────────────────────── */
.cal-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    border-top: 2px solid var(--color-text);
}

.cal-head {
    padding: var(--space-2) var(--space-1);
    text-align: center;
    font-size: var(--text-sm);
    font-weight: var(--font-bold);
    color: var(--color-text-sub);
    border-bottom: 1px solid var(--color-border);
}
.cal-head:first-child { color: var(--color-danger); }
.cal-head:last-child  { color: var(--color-primary); }

.cal-cell {
    min-height: 80px;
    border-bottom: 1px solid var(--color-border);
    border-right: 1px solid var(--color-border);
    padding: var(--space-1);
    position: relative;
}
.cal-cell:nth-child(7n) { border-right: none; }

.cal-cell.other-month { background: var(--color-gray-50); }
.cal-cell.other-month .cal-day { color: var(--color-text-muted); }

.cal-cell.today .cal-day {
    background: var(--color-primary);
    color: #fff;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cal-day {
    font-size: var(--text-sm);
    font-weight: var(--font-bold);
    margin-bottom: 2px;
    display: inline-block;
}
.cal-cell:nth-child(7n+1) .cal-day { color: var(--color-danger); }
.cal-cell:nth-child(7n)   .cal-day { color: var(--color-primary); }
.cal-cell.today .cal-day { color: #fff !important; }
.cal-cell.other-month .cal-day { color: var(--color-text-muted) !important; }

/* ── Study Chip (shared across study page & admin pages) ─── */
.study-chip {
    display: flex;
    flex-wrap: wrap;
    column-gap: 3px;
    padding: 2px 4px;
    margin-bottom: 2px;
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    line-height: var(--leading-tight);
    border-radius: 3px;
    cursor: pointer;
    overflow: hidden;
    transition: opacity var(--transition-fast);
}
.study-chip .chip-line1 { white-space: nowrap; }
.study-chip .chip-line2 { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.study-chip:hover { opacity: 0.75; }

.study-chip.status-active {
    background: var(--color-primary-100);
    color: var(--color-primary-700);
}
.study-chip.status-pending {
    background: var(--color-accent-100);
    color: var(--color-accent-600);
}
.study-chip.status-closed {
    background: var(--color-gray-100);
    color: var(--color-text-muted);
}

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 640px) {
    .cal-cell {
        min-height: 60px;
        padding: 2px;
    }
    .cal-day { font-size: var(--text-xs); }
    .study-chip {
        font-size: 10px;
        padding: 1px 3px;
    }
}