/* Clean, Modern, Premium Vanilla CSS for Teacher Portal */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&display=swap');

:root {
    --bg-primary: #0a0b10;
    --bg-secondary: #12131a;
    --bg-tertiary: #1a1c26;
    --border-color: #262938;
    
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --primary-glow: rgba(99, 102, 241, 0.15);
    
    --success: #10b981;
    --success-glow: rgba(16, 185, 129, 0.15);
    
    --warning: #f59e0b;
    --warning-glow: rgba(245, 158, 11, 0.15);
    
    --danger: #ef4444;
    --danger-glow: rgba(239, 68, 68, 0.15);
    
    --sidebar-width: 260px;
    --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    overflow-x: hidden;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Sidebar Layout */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    position: fixed;
    height: 100vh;
    display: flex;
    flex-direction: column;
    padding: 24px 16px;
    z-index: 10;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 40px;
    padding: 0 8px;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary), #a855f7);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: white;
    box-shadow: 0 0 15px var(--primary-glow);
}

.logo-text {
    font-size: 20px;
    font-weight: 600;
    letter-spacing: 0.5px;
    background: linear-gradient(to right, #ffffff, #d1d5db);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex-grow: 1;
}

.nav-item a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 10px;
    font-weight: 500;
    transition: all 0.2s ease;
}

.nav-item a:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.03);
}

.nav-item.active a {
    color: white;
    background-color: var(--primary);
    box-shadow: 0 4px 15px var(--primary-glow);
}

.sidebar-footer {
    border-top: 1px solid var(--border-color);
    padding-top: 16px;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    padding: 0 8px;
}

.user-avatar {
    width: 40px;
    height: 40px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    color: var(--primary);
}

.user-info {
    overflow: hidden;
}

.user-name {
    font-size: 14px;
    font-weight: 500;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.user-role {
    font-size: 12px;
    color: var(--text-muted);
}

.logout-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 10px;
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-radius: 8px;
    cursor: pointer;
    font-family: inherit;
    font-weight: 500;
    transition: all 0.2s ease;
    text-decoration: none;
}

.logout-btn:hover {
    background-color: var(--danger);
    color: white;
}

/* Main Content Area */
.main-content {
    margin-left: var(--sidebar-width);
    flex-grow: 1;
    padding: 40px;
    max-width: calc(100vw - var(--sidebar-width));
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}

.header-title h1 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 4px;
}

.header-title p {
    color: var(--text-secondary);
    font-size: 14px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 10px;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    text-decoration: none;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--primary-glow);
}

.btn-secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

.btn-danger {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

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

/* Dashboard Metrics Grid */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.metric-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    position: relative;
    overflow: hidden;
}

.metric-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background-color: var(--primary);
}

.metric-card.success::before { background-color: var(--success); }
.metric-card.warning::before { background-color: var(--warning); }
.metric-card.danger::before { background-color: var(--danger); }

.metric-label {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
}

.metric-value {
    font-size: 36px;
    font-weight: 700;
}

.metric-trend {
    font-size: 12px;
    display: flex;
    align-items: center;
    gap: 4px;
}

/* Layout Split: Cards & Activity */
.dashboard-layout {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 24px;
}

@media (max-width: 1024px) {
    .dashboard-layout {
        grid-template-columns: 1fr;
    }
}

/* Panel / Card styling */
.panel {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    margin-bottom: 24px;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.panel-title {
    font-size: 18px;
    font-weight: 600;
}

/* Lists and Tables */
.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

th {
    padding: 12px 16px;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 14px;
    border-bottom: 1px solid var(--border-color);
}

td {
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    font-size: 14px;
}

tr:last-child td {
    border-bottom: none;
}

tr:hover td {
    background-color: rgba(255, 255, 255, 0.01);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.badge-pending {
    background-color: var(--warning-glow);
    color: var(--warning);
}

.badge-completed {
    background-color: var(--success-glow);
    color: var(--success);
}

/* Activity Feed */
.activity-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.activity-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.activity-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.activity-icon {
    width: 32px;
    height: 32px;
    background-color: var(--bg-tertiary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
}

.activity-details {
    flex-grow: 1;
}

.activity-text {
    font-size: 14px;
    margin-bottom: 4px;
}

.activity-time {
    font-size: 12px;
    color: var(--text-muted);
}

/* Forms */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--text-secondary);
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 14px;
    transition: border-color 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
}

textarea.form-control {
    min-height: 100px;
    resize: vertical;
}

/* Login Page Specific Styling */
.login-body {
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle at top right, rgba(99, 102, 241, 0.08), transparent 40%),
                radial-gradient(circle at bottom left, rgba(168, 85, 247, 0.08), transparent 40%),
                var(--bg-primary);
}

.login-card {
    width: 100%;
    max-width: 400px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 40px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.login-header {
    text-align: center;
    margin-bottom: 32px;
}

.login-logo {
    display: inline-flex;
    margin-bottom: 16px;
}

.login-header h2 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 6px;
}

.login-header p {
    color: var(--text-secondary);
    font-size: 14px;
}

/* Alerts / Messages */
.alert-container {
    margin-bottom: 24px;
}

.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 10px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.alert-success {
    background-color: var(--success-glow);
    border: 1px solid rgba(16, 185, 129, 0.2);
    color: var(--success);
}

.alert-error {
    background-color: var(--danger-glow);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: var(--danger);
}

.alert-info {
    background-color: var(--primary-glow);
    border: 1px solid rgba(99, 102, 241, 0.2);
    color: var(--primary);
}

/* Modals or Slide-overs for Forms */
.modal-trigger-container {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 20px;
}

/* Grid of cards for students */
.student-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.student-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 20px;
    transition: transform 0.2s, border-color 0.2s;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.student-card:hover {
    transform: translateY(-2px);
    border-color: var(--primary);
}

.student-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.student-card-avatar {
    width: 48px;
    height: 48px;
    background-color: var(--bg-tertiary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: var(--primary);
    font-weight: 600;
}

.student-card-meta h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 2px;
}

.student-card-meta p {
    color: var(--text-muted);
    font-size: 12px;
}

.student-card-details {
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 16px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.student-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: var(--text-secondary);
}

/* Kanban Board for tasks */
.task-board {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

@media (max-width: 768px) {
    .task-board {
        grid-template-columns: 1fr;
    }
}

.task-column {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.task-column-header {
    font-size: 16px;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.task-card {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    transition: border-color 0.2s;
}

.task-card:hover {
    border-color: rgba(255, 255, 255, 0.1);
}

.task-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 12px;
}

.task-card-title {
    font-size: 14px;
    font-weight: 500;
}

.task-card-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.4;
}

.task-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: var(--text-muted);
}


/* Attendance Radio Selector Group */
.attendance-switch-group {
    display: inline-flex;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2px;
    gap: 2px;
}

.attendance-radio-label {
    cursor: pointer;
    font-size: 12px;
    font-weight: 600;
    padding: 6px 12px;
    border-radius: 6px;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.attendance-radio-input {
    display: none;
}

/* Status specific colors when checked */
.attendance-radio-input[value="PRESENT"]:checked + .attendance-radio-label {
    background-color: var(--success);
    color: white;
}

.attendance-radio-input[value="ABSENT"]:checked + .attendance-radio-label {
    background-color: var(--danger);
    color: white;
}

.attendance-radio-input[value="LATE"]:checked + .attendance-radio-label {
    background-color: var(--warning);
    color: white;
}

.attendance-radio-input[value="LEAVE"]:checked + .attendance-radio-label {
    background-color: var(--primary);
    color: white;
}

/* Tab Switcher Layout */
.tab-container {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 24px;
    gap: 16px;
}

.tab-btn {
    padding: 10px 16px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    position: relative;
    transition: color 0.2s;
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-btn.active {
    color: var(--primary);
    font-weight: 600;
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary);
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
}

/* Notice Cards Feed */
.notice-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 20px;
    margin-bottom: 16px;
    position: relative;
}

.notice-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
}

.notice-card-title {
    font-size: 16px;
    font-weight: 600;
    color: white;
}

.notice-card-meta {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.notice-card-content {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Score Sheets */
.scoresheet-input {
    width: 70px;
    text-align: center;
    padding: 6px;
    border-radius: 6px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: white;
    font-weight: 600;
}

.scoresheet-input:focus {
    outline: none;
    border-color: var(--primary);
}

.scoresheet-remarks {
    width: 100%;
    min-width: 150px;
    padding: 6px 10px;
    border-radius: 6px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: white;
}

.scoresheet-remarks:focus {
    outline: none;
    border-color: var(--primary);
}