/* ── Root Variables ────────────────────────────────────────── */
/* These are overridden dynamically by the admin colour picker  */
:root {
    --primary: #2c3e50;
    --secondary: #3498db;
    --accent: #ffffff;
    --light-bg: #f8f9fa;
    --text: #2c3e50;
    --muted: #6c757d;
    --border: #dee2e6;
    --white: #ffffff;
    --danger: #e74c3c;
    --success: #27ae60;
}

/* ── Form wrapper — centres forms on the page ── */
.form-wrapper {
    max-width: 480px;
    margin: 0 auto;
    text-align: left;
}

/* ── Base ───────────────────────────────────────────────────── */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--light-bg);
    color: var(--text);
}

a {
    color: var(--secondary);
    text-decoration: none;
}

a:hover {
    color: var(--primary);
    text-decoration: underline;
}

/* ── Navbar ─────────────────────────────────────────────────── */
.navbar {
    background-color: var(--primary) !important;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
    padding: 0.75rem 1.5rem;
}

.navbar-brand {
    color: var(--white) !important;
    font-weight: 600;
    font-size: 1.1rem;
}

.navbar-brand img {
    border-radius: 4px;
}

.nav-link {
    color: rgba(255,255,255,0.85) !important;
    font-size: 0.9rem;
    transition: color 0.2s;
}

.nav-link:hover {
    color: var(--white) !important;
}

.nav-link.text-danger {
    color: #ff6b6b !important;
}

.navbar-text {
    color: rgba(255,255,255,0.7) !important;
    font-size: 0.85rem;
}

.navbar-toggler {
    border-color: rgba(255,255,255,0.3);
}

/* ── Main Content ───────────────────────────────────────────── */
main {
    min-height: calc(100vh - 120px);
    padding: 2rem 1rem;
}

h2 {
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 1.5rem;
}

h3, h4 {
    color: var(--primary);
    font-weight: 500;
}

hr {
    border-color: var(--border);
    margin: 2rem 0;
}

/* ── Cards ──────────────────────────────────────────────────── */
.card {
    border: 1px solid var(--border);
    border-radius: 10px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.06);
    background: var(--white);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

/* ── Buttons ────────────────────────────────────────────────── */
.btn-primary, button[type="submit"]:not(.btn-danger):not(.btn-secondary) {
    background-color: var(--secondary);
    border-color: var(--secondary);
    color: var(--white);
    border-radius: 6px;
    padding: 0.4rem 1rem;
    font-size: 0.9rem;
    transition: background-color 0.2s, border-color 0.2s;
}

.btn-primary:hover, button[type="submit"]:hover {
    background-color: var(--primary) !important;
    border-color: var(--primary) !important;
}

.btn-danger {
    background-color: var(--danger);
    border-color: var(--danger);
}

.btn-danger:hover {
    background-color: #c0392b;
    border-color: #c0392b;
}

.btn-secondary {
    background-color: var(--muted);
    border-color: var(--muted);
}

/* ── Forms ──────────────────────────────────────────────────── */
label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 0.75rem;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="date"],
input[type="time"],
select,
textarea {
    display: block;
    width: 100%;
    max-width: 100%;
    padding: 0.4rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.9rem;
    margin-top: 0.25rem;
    background-color: var(--white);
    color: var(--text);
    transition: border-color 0.2s;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--secondary);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.15);
}

/* ── Tables ─────────────────────────────────────────────────── */
table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    background: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 1px 4px rgba(0,0,0,0.06);
    margin-bottom: 1.5rem;
}

thead {
    background-color: var(--primary);
    color: var(--white);
}

thead th {
    padding: 0.75rem 1rem;
    font-weight: 500;
    text-align: left;
}

tbody tr {
    border-bottom: 1px solid var(--border);
    transition: background-color 0.15s;
}

tbody tr:hover {
    background-color: var(--light-bg);
}

tbody td {
    padding: 0.65rem 1rem;
}

/* ── Badges ─────────────────────────────────────────────────── */
.badge {
    font-size: 0.75rem;
    padding: 0.3em 0.6em;
    border-radius: 4px;
}

.badge.bg-primary {
    background-color: var(--secondary) !important;
}

.badge.bg-dark {
    background-color: var(--primary) !important;
}

/* ── Accordion (teachers page) ──────────────────────────────── */
.accordion-button {
    background-color: var(--white);
    color: var(--primary);
    font-weight: 500;
}

.accordion-button:not(.collapsed) {
    background-color: var(--primary);
    color: var(--white);
    box-shadow: none;
}

.accordion-button:focus {
    box-shadow: none;
    border-color: var(--border);
}

.accordion-item {
    border: 1px solid var(--border);
    margin-bottom: 0.5rem;
    border-radius: 8px !important;
    overflow: hidden;
}

/* ── Alerts ─────────────────────────────────────────────────── */
.alert-primary {
    background-color: var(--secondary);
    border-color: var(--secondary);
    color: var(--white);
}

/* ── Calendar ───────────────────────────────────────────────── */
#calendar {
    background: var(--white);
    border-radius: 10px;
    padding: 1rem;
    box-shadow: 0 2px 6px rgba(0,0,0,0.06);
    margin-top: 1rem;
}

.fc-toolbar-title {
    color: var(--primary);
    font-size: 1.1rem !important;
}

.fc-button-primary {
    background-color: var(--secondary) !important;
    border-color: var(--secondary) !important;
}

.fc-button-primary:hover {
    background-color: var(--primary) !important;
    border-color: var(--primary) !important;
}

.fc-button-active {
    background-color: var(--primary) !important;
    border-color: var(--primary) !important;
}

/* ── Auth pages (login/register) ────────────────────────────── */
.auth-card {
    max-width: 420px;
    margin: 3rem auto;
    background: var(--white);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 16px rgba(0,0,0,0.1);
}

.auth-card h2 {
    text-align: center;
    margin-bottom: 1.5rem;
}

/* ── Error page ─────────────────────────────────────────────── */
.error-container {
    text-align: center;
    padding: 4rem 1rem;
}

.error-container h1 {
    font-size: 4rem;
    color: var(--primary);
    font-weight: 700;
}

.error-container p {
    color: var(--muted);
    font-size: 1.1rem;
}

/* ── Misc ───────────────────────────────────────────────────── */
.text-muted {
    color: var(--muted) !important;
}

.teacher-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1.25rem;
    margin-bottom: 1rem;
}

footer {
    text-align: center;
    padding: 1rem;
    color: var(--muted);
    font-size: 0.8rem;
}

/* ── Dropdown ───────────────────────────────────────────────── */
.dropdown-menu {
    border: 1px solid var(--border);
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    padding: 0.25rem 0;
}

.dropdown-item {
    font-size: 0.9rem;
    color: var(--text);
    padding: 0.5rem 1rem;
}

.dropdown-item:hover {
    background-color: var(--light-bg);
    color: var(--primary);
}

.dropdown-divider {
    border-color: var(--border);
}

/* ── FullCalendar ───────────────────────────────────────────── */

/* Day headers — use primary colour */
.fc .fc-col-header-cell {
    background-color: var(--primary);
    color: white;
}

.fc .fc-col-header-cell a {
    color: white !important;
}

/* Remove outer border */
.fc-theme-standard .fc-scrollgrid {
    border: none !important;
}

/* Remove left time gutter border */
.fc .fc-timegrid-axis {
    border: none !important;
}

/* Lighter time labels */
.fc .fc-timegrid-slot-label {
    font-size: 0.75rem;
    color: var(--muted) !important;
    border: none !important;
}

/* Barely visible slot lines */
.fc .fc-timegrid-slot {
    height: 3rem;
    border-bottom: 1px solid #f0f0f0 !important;
}

/* Remove minor slot lines */
.fc .fc-timegrid-slot-minor {
    border-bottom: none !important;
}

/* Lighter grid lines */
.fc-theme-standard td,
.fc-theme-standard th {
    border-color: var(--border) !important;
}

/* Remove today highlight */
.fc .fc-day-today {
    background-color: transparent !important;
}

/* Subtle today column header */
.fc .fc-day-today .fc-col-header-cell-cushion {
    background-color: var(--accent);
    border-radius: 4px;
    padding: 2px 8px;
    color: white;
}

/* Clean event blocks */
.fc-event {
    border-radius: 4px !important;
    border: none !important;
    padding: 0 !important;
    font-size: 0.78rem !important;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1) !important;
}

.fc-event-title {
    font-weight: 500 !important;
}

/* Current time indicator */
.fc .fc-timegrid-now-indicator-line {
    border-color: var(--accent) !important;
}

/* Allow \n in event titles */
.fc-event-title {
    white-space: pre-wrap;
}

/* Center descriptions of events */
.fc-event-title {
    white-space: pre-wrap;
    text-align: center;
}

.fc-event-time {
    text-align: center;
}

.timetable-cell {
    height: 100%;
    min-height: 60px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.fc-event-main-frame {
    display: flex;
    flex-direction: column;
    justify-content: center;
    height: 100%;
    padding: 2px 6px;
}

.fc-event-main {
    height: 100% !important;
    display: flex !important;
    flex-direction: column !important;
    justify-content: center !important;
}

.btn-secondary {
    padding: 0.4rem 1rem;
    font-size: 0.9rem;
    border-radius: 6px;
}

.btn-secondary:hover {
    background-color: #5a6268;
    border-color: #5a6268;
}

.btn-outline-secondary:hover {
    background-color: var(--muted);
    border-color: var(--muted);
    color: white;
}