/* ===== Cards ===== */
.card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--bg-card-border);
    border-radius: var(--radius-md);
    padding: 1.75rem;
    position: relative;
    overflow: visible;
    transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    animation: slideUpCard 0.5s cubic-bezier(0.25, 0.8, 0.25, 1) both;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    opacity: 0;
    transition: opacity var(--transition);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.1);
    border-color: rgba(255, 255, 255, 0.12);
}

.card:hover::before {
    opacity: 1;
}

.create-card {
    z-index: 10;
}

.card h2 {
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

/* ===== Form Structure ===== */
.form-row {
    display: flex;
    gap: 1rem;
    align-items: flex-end;
    flex-wrap: wrap;
}

.form-group {
    flex: 1;
    min-width: 160px;
}

.form-group label {
    display: block;
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--bg-input);
    border: 1px solid var(--bg-card-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    outline: none;
    transition: all var(--transition);
}

.form-group input::placeholder {
    color: var(--text-placeholder);
    transition: opacity var(--transition);
}

.form-group input:focus,
.form-group select:focus {
    background: var(--bg-input-focus);
    border-color: var(--accent);
    box-shadow: 0 0 0 4px var(--accent-glow);
    transform: translateY(-1px);
}

.form-group input:focus::placeholder {
    opacity: 0.5;
}

/* Hide Number Arrows */
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

input[type="number"] {
    -moz-appearance: textfield;
}

/* Select Base Style */
.form-group select,
.filter-row select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%239ca3af' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2.25rem;
}

.form-group select option,
.filter-row select option {
    background: #1a1a2e;
    color: var(--text-primary);
}

/* Light theme selects */
[data-theme="light"] .form-group input,
[data-theme="light"] .form-group select,
[data-theme="light"] .filter-row select {
    border-color: rgba(0, 0, 0, 0.15);
}

[data-theme="light"] .form-group select option,
[data-theme="light"] .filter-row select option {
    background: #fff;
    color: #1a1a2e;
}

/* Filter Row */
.card-header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.card-header-row h2 {
    margin-bottom: 0;
}

.filter-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.filter-row label {
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    white-space: nowrap;
}

.filter-row select {
    padding: 0.45rem 2rem 0.45rem 0.7rem;
    background: var(--bg-input);
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.85rem;
    transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.filter-row select:focus {
    background-color: var(--bg-input-focus);
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}


/* ===== Custom Multi-Select ===== */
.custom-multi-select {
    position: relative;
    user-select: none;
    width: 100%;
}

.select-box {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--bg-input);
    border: 1px solid var(--bg-card-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition);
}

.select-box:hover {
    background: var(--bg-hover);
}

.select-box.active {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px var(--accent-glow);
}

.dropdown-icon {
    transition: transform var(--transition);
}

.select-box.active .dropdown-icon {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    margin-top: 0.5rem;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--bg-card-border);
    border-radius: var(--radius-sm);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
    padding: 1rem;
    z-index: 100;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition);
}

[data-theme="light"] .custom-multi-select .dropdown-menu {
    background: rgba(255, 255, 255, 0.98);
}

.dropdown-menu.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.checkbox-group-vertical {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    max-height: 200px;
    overflow-y: auto;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-primary);
    padding: 0.25rem 0;
}

.checkbox-item input[type="checkbox"] {
    cursor: pointer;
    width: 1.1rem;
    height: 1.1rem;
    accent-color: var(--accent);
}

/* ===== Buttons ===== */
.btn-primary {
    position: relative;
    overflow: hidden;
    padding: 0.75rem 1.75rem;
    background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
    border: none;
    border-radius: var(--radius-sm);
    color: #fff;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    cursor: pointer;
    white-space: nowrap;
    transition: all var(--transition);
    box-shadow: 0 4px 15px var(--accent-glow);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(rgba(255, 255, 255, 0.2), transparent);
    border-radius: inherit;
    opacity: 0;
    transition: opacity var(--transition);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--accent-glow);
}

.btn-primary:hover::before {
    opacity: 1;
}

.btn-primary:active {
    transform: translateY(1px);
    box-shadow: 0 2px 10px var(--accent-glow);
}

.btn-delete {
    padding: 0.35rem 0.7rem;
    background: rgba(248, 113, 113, 0.1);
    border: 1px solid rgba(248, 113, 113, 0.2);
    border-radius: var(--radius-sm);
    color: var(--error);
    font-family: inherit;
    font-size: 0.8rem;
    cursor: pointer;
    transition: background var(--transition), transform var(--transition);
    position: relative;
    overflow: hidden;
}

.btn-delete:hover {
    background: rgba(248, 113, 113, 0.2);
    transform: scale(1.05);
}

.btn-icon-toggle {
    background: transparent;
    border: 1px solid var(--bg-card-border);
    color: var(--text-secondary);
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    padding: 0;
}

.btn-icon-toggle:hover {
    background: var(--bg-card);
    border-color: var(--accent);
    color: var(--accent);
    transform: rotate(45deg);
    box-shadow: 0 0 10px var(--accent-glow);
}

.btn-edit-classroom {
    padding: 0.35rem 0.7rem;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-sm);
    color: var(--accent-hover);
    cursor: pointer;
    transition: all var(--transition);
}

.btn-edit-classroom:hover {
    background: rgba(99, 102, 241, 0.2);
    transform: translateY(-1px);
}

/* ===== Alerts ===== */
.form-alert {
    display: none;
    padding: 0.6rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    margin-top: 0.75rem;
}

.form-alert.error {
    display: block;
    background: rgba(248, 113, 113, 0.1);
    border: 1px solid rgba(248, 113, 113, 0.2);
    color: var(--error);
    animation: slideDownAlert 0.3s ease-out both;
}

.form-alert.success {
    display: block;
    background: rgba(52, 211, 153, 0.1);
    border: 1px solid rgba(52, 211, 153, 0.2);
    color: var(--success);
    animation: slideDownAlert 0.3s ease-out both;
}

/* ===== Table ===== */
.table-wrap {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead th {
    text-align: left;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 0.6rem 0.8rem;
    border-bottom: 1px solid var(--bg-card-border);
}

tbody td {
    padding: 0.85rem 1rem;
    font-size: 0.95rem;
    border-bottom: 1px solid var(--bg-card-border);
    transition: background var(--transition);
}

[data-theme="light"] tbody td {
    border-bottom-color: rgba(0, 0, 0, 0.08);
}

tbody tr {
    transition: background var(--transition);
    animation: slideInRow 0.3s ease-out both;
}

/* Animation delays */
tbody tr:nth-child(1) {
    animation-delay: 0.05s;
}

tbody tr:nth-child(2) {
    animation-delay: 0.1s;
}

tbody tr:nth-child(3) {
    animation-delay: 0.15s;
}

tbody tr:nth-child(4) {
    animation-delay: 0.2s;
}

tbody tr:nth-child(5) {
    animation-delay: 0.25s;
}

tbody tr:nth-child(n+6) {
    animation-delay: 0.3s;
}

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

.loading-row {
    text-align: center;
    color: var(--text-secondary);
    padding: 2rem !important;
}

/* ===== Badges ===== */
.badge {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.badge-admin {
    background: rgba(248, 113, 113, 0.15);
    color: var(--error);
}

.badge-teacher {
    background: rgba(251, 191, 36, 0.15);
    color: var(--warning);
}

.badge-student {
    background: rgba(52, 211, 153, 0.15);
    color: var(--success);
}

.badge-ef {
    background: rgba(99, 102, 241, 0.15);
    color: var(--accent-hover);
}

/* Classroom Status */
.badge-available {
    background: rgba(16, 185, 129, 0.15);
    color: var(--success);
}

.badge-unavailable {
    background: rgba(248, 113, 113, 0.15);
    color: var(--error);
}

.status-cell {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ===== Modal ===== */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition);
}

.modal-overlay.open {
    display: flex;
    opacity: 1;
}

.modal-content {
    background: var(--bg-primary);
    border: 1px solid var(--bg-card-border);
    border-radius: var(--radius-md);
    padding: 2rem;
    width: 90%;
    max-width: 500px;
    position: relative;
    transform: scale(0.95);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

.modal-overlay.open .modal-content {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color var(--transition);
}

.modal-close:hover {
    color: var(--error);
}