/* ============================================
   ScholarTrack - Student Management System
   Design System: Terracotta Studio
   ============================================ */

/* CSS Variables - Terracotta Studio Palette */
:root {
    /* Primary Colors */
    --color-primary: #B5563E;
    --color-primary-light: #D4896A;
    --color-primary-dark: #8B4330;
    
    /* Secondary Colors */
    --color-secondary: #3D2B1F;
    --color-secondary-light: #5C4535;
    
    /* Background Colors */
    --color-bg: #F2E6D9;
    --color-bg-card: #FFFFFF;
    --color-bg-sidebar: #3D2B1F;
    
    /* Text Colors */
    --color-text: #3D2B1F;
    --color-text-light: #6B5B4F;
    --color-text-muted: #9B8B7F;
    --color-text-inverse: #F2E6D9;
    
    /* Accent Colors */
    --color-success: #2D6A1E;
    --color-warning: #C9956B;
    --color-danger: #B5563E;
    --color-info: #7B68EE;
    
    /* Border & Shadow */
    --color-border: #D4C5A9;
    --shadow-sm: 0 1px 2px rgba(61, 43, 31, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(61, 43, 31, 0.1), 0 2px 4px -1px rgba(61, 43, 31, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(61, 43, 31, 0.1), 0 4px 6px -2px rgba(61, 43, 31, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(61, 43, 31, 0.1), 0 10px 10px -5px rgba(61, 43, 31, 0.04);
    
    /* Typography */
    --font-display: 'Zodiak', Georgia, serif;
    --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
}

/* ============================================
   Layout
   ============================================ */

.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 280px;
    background-color: var(--color-bg-sidebar);
    color: var(--color-text-inverse);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
}

.sidebar-header {
    padding: var(--space-xl);
    border-bottom: 1px solid rgba(242, 230, 217, 0.1);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.logo-text {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text-inverse);
}

.sidebar-nav {
    flex: 1;
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    color: rgba(242, 230, 217, 0.7);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    font-weight: 500;
}

.nav-item:hover {
    background-color: rgba(242, 230, 217, 0.1);
    color: var(--color-text-inverse);
}

.nav-item.active {
    background-color: var(--color-primary);
    color: white;
}

.nav-item svg {
    flex-shrink: 0;
}

.sidebar-footer {
    padding: var(--space-lg);
    border-top: 1px solid rgba(242, 230, 217, 0.1);
}

.storage-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.storage-bar {
    height: 4px;
    background-color: rgba(242, 230, 217, 0.2);
    border-radius: 2px;
    overflow: hidden;
}

.storage-fill {
    height: 100%;
    background-color: var(--color-primary-light);
    border-radius: 2px;
    transition: width var(--transition-slow);
}

.storage-text {
    font-size: 0.75rem;
    color: rgba(242, 230, 217, 0.5);
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 280px;
    padding: var(--space-2xl);
    min-height: 100vh;
}

/* Header */
.main-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-2xl);
}

.header-left {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.page-title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 600;
    color: var(--color-text);
}

.page-subtitle {
    color: var(--color-text-light);
    font-size: 0.95rem;
}

.header-right {
    display: flex;
    gap: var(--space-md);
}

/* ============================================
   Components
   ============================================ */

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

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

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

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

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

.btn-danger:hover {
    background-color: #9A4630;
}

.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-icon:hover {
    background-color: var(--color-bg);
    border-color: var(--color-primary);
}

/* Cards */
.stat-card {
    background-color: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.stat-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.stat-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-icon.students {
    background-color: rgba(181, 86, 62, 0.1);
    color: var(--color-primary);
}

.stat-icon.attendance {
    background-color: rgba(45, 106, 30, 0.1);
    color: var(--color-success);
}

.stat-icon.marks {
    background-color: rgba(123, 104, 238, 0.1);
    color: var(--color-info);
}

.stat-icon.performance {
    background-color: rgba(201, 149, 107, 0.1);
    color: var(--color-warning);
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-text);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.dashboard-card {
    background-color: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-lg);
}

.card-header h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
}

.view-all {
    color: var(--color-primary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
}

.view-all:hover {
    text-decoration: underline;
}

.date-badge {
    background-color: var(--color-bg);
    color: var(--color-text-light);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
}

/* Report Cards */
.report-card {
    background-color: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    cursor: pointer;
}

.report-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.report-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-lg);
    background-color: var(--color-bg);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
}

.report-card h3 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    margin-bottom: var(--space-sm);
}

.report-card p {
    color: var(--color-text-light);
    font-size: 0.9rem;
    margin-bottom: var(--space-lg);
}

/* Tables */
.table-container {
    background-color: var(--color-bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.table-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
    gap: var(--space-md);
}

.search-box {
    position: relative;
    flex: 1;
    max-width: 320px;
}

.search-box svg {
    position: absolute;
    left: var(--space-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
}

.search-box input {
    width: 100%;
    padding: var(--space-md) var(--space-md) var(--space-md) 2.5rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 0.9rem;
    transition: all var(--transition-base);
}

.search-box input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(181, 86, 62, 0.1);
}

.filter-group select {
    padding: var(--space-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 0.9rem;
    background-color: white;
    cursor: pointer;
}

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

.data-table th,
.data-table td {
    padding: var(--space-md) var(--space-lg);
    text-align: left;
}

.data-table th {
    background-color: var(--color-bg);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-text-light);
}

.data-table tbody tr {
    border-bottom: 1px solid var(--color-border);
    transition: background-color var(--transition-fast);
}

.data-table tbody tr:hover {
    background-color: rgba(242, 230, 217, 0.5);
}

.data-table tbody tr:last-child {
    border-bottom: none;
}

.student-cell {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.student-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--color-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.9rem;
}

.student-info {
    display: flex;
    flex-direction: column;
}

.student-name {
    font-weight: 600;
    color: var(--color-text);
}

.student-class {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.grade-badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
}

.grade-badge.grade-a {
    background-color: rgba(45, 106, 30, 0.1);
    color: var(--color-success);
}

.grade-badge.grade-b {
    background-color: rgba(123, 104, 238, 0.1);
    color: var(--color-info);
}

.grade-badge.grade-c {
    background-color: rgba(201, 149, 107, 0.1);
    color: var(--color-warning);
}

.grade-badge.grade-d,
.grade-badge.grade-f {
    background-color: rgba(181, 86, 62, 0.1);
    color: var(--color-danger);
}

.attendance-bar {
    width: 100px;
    height: 6px;
    background-color: var(--color-border);
    border-radius: 3px;
    overflow: hidden;
}

.attendance-fill {
    height: 100%;
    border-radius: 3px;
    transition: width var(--transition-slow);
}

.attendance-fill.high {
    background-color: var(--color-success);
}

.attendance-fill.medium {
    background-color: var(--color-warning);
}

.attendance-fill.low {
    background-color: var(--color-danger);
}

.action-btns {
    display: flex;
    gap: var(--space-sm);
}

.action-btn {
    width: 32px;
    height: 32px;
    border: none;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.action-btn.edit {
    background-color: rgba(123, 104, 238, 0.1);
    color: var(--color-info);
}

.action-btn.edit:hover {
    background-color: var(--color-info);
    color: white;
}

.action-btn.delete {
    background-color: rgba(181, 86, 62, 0.1);
    color: var(--color-danger);
}

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

/* Forms */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--space-sm);
    font-weight: 500;
    font-size: 0.9rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--space-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: all var(--transition-base);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(181, 86, 62, 0.1);
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-md);
    margin-top: var(--space-xl);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(61, 43, 31, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background-color: var(--color-bg-card);
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 560px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-xl);
    border-bottom: 1px solid var(--color-border);
}

.modal-header h2 {
    font-family: var(--font-display);
    font-size: 1.5rem;
}

.modal-close {
    width: 36px;
    height: 36px;
    border: none;
    background-color: var(--color-bg);
    border-radius: var(--radius-md);
    font-size: 1.5rem;
    color: var(--color-text-light);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background-color: var(--color-border);
    color: var(--color-text);
}

.modal form {
    padding: var(--space-xl);
}

/* Attendance */
.attendance-container {
    background-color: var(--color-bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.attendance-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg) var(--space-xl);
    border-bottom: 1px solid var(--color-border);
}

.date-nav {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.current-date {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    min-width: 200px;
    text-align: center;
}

.attendance-actions {
    display: flex;
    gap: var(--space-md);
}

.attendance-list {
    padding: var(--space-lg);
}

.attendance-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
}

.attendance-item:last-child {
    border-bottom: none;
}

.attendance-student {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.attendance-toggle {
    display: flex;
    gap: var(--space-xs);
}

.toggle-btn {
    padding: var(--space-sm) var(--space-lg);
    border: 2px solid var(--color-border);
    background-color: white;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.toggle-btn:hover {
    border-color: var(--color-primary-light);
}

.toggle-btn.active.present {
    background-color: var(--color-success);
    border-color: var(--color-success);
    color: white;
}

.toggle-btn.active.absent {
    background-color: var(--color-danger);
    border-color: var(--color-danger);
    color: white;
}

.toggle-btn.active.late {
    background-color: var(--color-warning);
    border-color: var(--color-warning);
    color: white;
}

/* Marks */
.marks-container {
    background-color: var(--color-bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.marks-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg) var(--space-xl);
    border-bottom: 1px solid var(--color-border);
}

.student-select {
    padding: var(--space-md) var(--space-lg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 0.95rem;
    min-width: 280px;
}

.marks-content {
    padding: var(--space-xl);
}

.marks-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: var(--space-lg);
}

.marks-table th,
.marks-table td {
    padding: var(--space-md) var(--space-lg);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.marks-table th {
    background-color: var(--color-bg);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-text-light);
}

.mark-score {
    font-weight: 600;
}

.mark-score.high {
    color: var(--color-success);
}

.mark-score.medium {
    color: var(--color-warning);
}

.mark-score.low {
    color: var(--color-danger);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--space-2xl);
}

.empty-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-lg);
    background-color: var(--color-bg);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
}

.empty-state h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
}

.empty-state p {
    color: var(--color-text-light);
}

/* Recent List */
.recent-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.recent-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md);
    background-color: var(--color-bg);
    border-radius: var(--radius-md);
}

.recent-info {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.recent-meta {
    text-align: right;
}

.recent-grade {
    font-weight: 600;
    color: var(--color-primary);
}

/* Attendance Quick */
.attendance-quick {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.attendance-stat {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md);
    background-color: var(--color-bg);
    border-radius: var(--radius-md);
}

.attendance-stat-label {
    color: var(--color-text-light);
    font-size: 0.9rem;
}

.attendance-stat-value {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
}

.attendance-stat-value.present {
    color: var(--color-success);
}

.attendance-stat-value.absent {
    color: var(--color-danger);
}

/* Reports */
.reports-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.report-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.report-output {
    background-color: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
    min-height: 400px;
}

/* View Management */
.view {
    display: none;
}

.view.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-xl);
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.toast {
    background-color: var(--color-bg-card);
    border-radius: var(--radius-md);
    padding: var(--space-md) var(--space-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    min-width: 300px;
    animation: slideInRight 0.3s ease;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.toast.success {
    border-left: 4px solid var(--color-success);
}

.toast.error {
    border-left: 4px solid var(--color-danger);
}

.toast.info {
    border-left: 4px solid var(--color-info);
}

/* Responsive */
@media (max-width: 1200px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .report-cards {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .app-container {
        flex-direction: column;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .report-cards {
        grid-template-columns: 1fr;
    }
    
    .main-header {
        flex-direction: column;
        gap: var(--space-lg);
    }
    
    .header-right {
        width: 100%;
        justify-content: flex-end;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}

/* Print Styles */
@media print {
    .sidebar,
    .main-header,
    .btn,
    .action-btns,
    .modal {
        display: none !important;
    }
    
    .main-content {
        margin-left: 0;
        padding: 0;
    }
    
    .view {
        display: block !important;
    }
}