/* ============================================
   EduSync ERP - School Management System
   Design System: Indigo Ink Palette
   Typography: Cormorant Garamond + Manrope
   ============================================ */

:root {
    /* Indigo Ink Palette */
    --color-bg-primary: #1B0A3C;
    --color-bg-secondary: #3D1E7C;
    --color-bg-tertiary: #2A1A5E;
    --color-accent: #7B68EE;
    --color-accent-light: #9B8AF7;
    --color-accent-dark: #5A4FCF;
    --color-text-primary: #E8E0F0;
    --color-text-secondary: #B8A9D0;
    --color-text-muted: #8B7CB3;
    --color-border: rgba(123, 104, 238, 0.2);
    --color-success: #4ADE80;
    --color-warning: #FBBF24;
    --color-danger: #F87171;
    --color-info: #60A5FA;
    
    /* Typography */
    --font-display: 'Cormorant Garamond', serif;
    --font-body: 'Manrope', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(123, 104, 238, 0.3);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.25s ease;
    --transition-slow: 0.4s ease;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-text-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

a {
    color: var(--color-accent-light);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-accent);
}

/* Utility Classes */
.hidden { display: none !important; }
.flex { display: flex; }
.grid { display: grid; }
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }

/* ============================================
   LOGIN SCREEN
   ============================================ */
.login-screen {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
    position: relative;
    overflow: hidden;
}

.login-screen::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(123, 104, 238, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

.login-container {
    background: rgba(61, 30, 124, 0.6);
    backdrop-filter: blur(20px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    width: 100%;
    max-width: 420px;
    position: relative;
    z-index: 1;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.login-brand {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.logo-icon {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-md);
    display: inline-block;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.login-brand h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-accent-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-brand p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.form-group input,
.form-group select {
    padding: var(--spacing-md);
    background: rgba(27, 10, 60, 0.5);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(123, 104, 238, 0.2);
}

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

.login-footer {
    text-align: center;
    margin-top: var(--spacing-lg);
}

.forgot-password {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.forgot-password:hover {
    color: var(--color-accent-light);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-secondary {
    background: rgba(123, 104, 238, 0.15);
    color: var(--color-accent-light);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: rgba(123, 104, 238, 0.25);
    border-color: var(--color-accent);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-text-primary);
}

.btn-icon {
    padding: var(--spacing-sm);
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
}

.btn-sm {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
}

.btn-full {
    width: 100%;
}

/* ============================================
   DASHBOARD LAYOUT
   ============================================ */
.dashboard {
    display: flex;
    min-height: 100vh;
    background: var(--color-bg-primary);
}

/* Sidebar */
.sidebar {
    width: 280px;
    background: var(--color-bg-secondary);
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
    transition: transform var(--transition-base);
}

.sidebar-header {
    padding: var(--spacing-lg) var(--spacing-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

.sidebar-header .logo-icon {
    font-size: 1.75rem;
    margin: 0;
    animation: none;
}

.logo-text {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-accent-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
}

.nav-section {
    margin-bottom: var(--spacing-lg);
}

.nav-label {
    display: block;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-text-muted);
    padding: var(--spacing-sm) var(--spacing-md);
    margin-bottom: var(--spacing-xs);
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
    margin-bottom: var(--spacing-xs);
}

.nav-item:hover {
    background: rgba(123, 104, 238, 0.1);
    color: var(--color-text-primary);
}

.nav-item.active {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    color: white;
    box-shadow: var(--shadow-md);
}

.nav-icon {
    font-size: 1.25rem;
    width: 24px;
    text-align: center;
}

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

.user-profile {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1rem;
}

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

.user-name {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--color-text-primary);
}

.user-role {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 280px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.content-header {
    height: 70px;
    background: rgba(27, 10, 60, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-xl);
    position: sticky;
    top: 0;
    z-index: 50;
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.header-left h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.search-box {
    position: relative;
}

.search-box input {
    width: 280px;
    padding: var(--spacing-sm) var(--spacing-md);
    padding-right: 40px;
    background: rgba(61, 30, 124, 0.5);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    color: var(--color-text-primary);
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.search-box input:focus {
    outline: none;
    border-color: var(--color-accent);
    width: 320px;
}

.search-icon {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    opacity: 0.5;
}

.notification-btn {
    position: relative;
}

.notification-badge {
    position: absolute;
    top: 2px;
    right: 2px;
    width: 18px;
    height: 18px;
    background: var(--color-danger);
    border-radius: var(--radius-full);
    font-size: 0.65rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Content Area */
.content-area {
    flex: 1;
    padding: var(--spacing-xl);
    overflow-y: auto;
}

/* ============================================
   MODULES
   ============================================ */
.module {
    display: none;
    animation: fadeIn 0.4s ease;
}

.module.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ============================================
   DASHBOARD MODULE
   ============================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background: linear-gradient(135deg, rgba(61, 30, 124, 0.6) 0%, rgba(42, 26, 94, 0.8) 100%);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: all var(--transition-base);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-accent);
}

.stat-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
}

.stat-icon.students { background: rgba(123, 104, 238, 0.2); }
.stat-icon.teachers { background: rgba(74, 222, 128, 0.2); }
.stat-icon.attendance { background: rgba(251, 191, 36, 0.2); }
.stat-icon.fees { background: rgba(96, 165, 250, 0.2); }

.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-primary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.stat-change {
    font-size: 0.75rem;
    margin-top: var(--spacing-xs);
}

.stat-change.positive { color: var(--color-success); }

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.dashboard-card {
    background: rgba(61, 30, 124, 0.4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.dashboard-card.wide {
    grid-column: span 2;
}

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

.card-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

.view-all {
    font-size: 0.875rem;
    color: var(--color-accent-light);
}

/* Admission List */
.admission-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.admission-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(27, 10, 60, 0.3);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.admission-item:hover {
    background: rgba(123, 104, 238, 0.1);
}

.admission-avatar {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
}

.admission-info {
    flex: 1;
    display: flex;
    flex-direction: column;
}

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

.admission-class {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.admission-date {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

/* Event List */
.event-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.event-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(27, 10, 60, 0.3);
    border-radius: var(--radius-md);
}

.event-date {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.event-day {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1;
}

.event-month {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.event-info {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.event-title {
    font-weight: 600;
    color: var(--color-text-primary);
}

.event-time {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

/* Chart */
.chart-legend {
    display: flex;
    gap: var(--spacing-lg);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.legend-color {
    width: 12px;
    height: 12px;
    border-radius: var(--radius-sm);
}

.chart-container {
    height: 200px;
    margin-top: var(--spacing-lg);
}

.bar-chart {
    display: flex;
    align-items: flex-end;
    justify-content: space-around;
    height: 100%;
    padding-bottom: 30px;
    position: relative;
}

.bar-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    flex: 1;
}

.bar-stack {
    width: 40px;
    height: 160px;
    display: flex;
    flex-direction: column-reverse;
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.bar {
    width: 100%;
    transition: all var(--transition-base);
}

.bar.collected {
    background: linear-gradient(180deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
}

.bar.pending {
    background: var(--color-border);
}

.bar-label {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

/* ============================================
   MODULE HEADERS & FILTERS
   ============================================ */
.module-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.module-actions {
    display: flex;
    gap: var(--spacing-md);
}

.module-filters {
    display: flex;
    gap: var(--spacing-md);
}

.filter-select,
.search-input {
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(61, 30, 124, 0.5);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-size: 0.9rem;
    min-width: 160px;
}

.filter-select:focus,
.search-input:focus {
    outline: none;
    border-color: var(--color-accent);
}

/* ============================================
   DATA TABLES
   ============================================ */
.data-table-container {
    background: rgba(61, 30, 124, 0.4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

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

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

.data-table th {
    background: rgba(27, 10, 60, 0.5);
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-text-secondary);
}

.data-table tbody tr:hover {
    background: rgba(123, 104, 238, 0.05);
}

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

.status-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.status-badge.active,
.status-badge.paid {
    background: rgba(74, 222, 128, 0.2);
    color: var(--color-success);
}

.status-badge.pending {
    background: rgba(251, 191, 36, 0.2);
    color: var(--color-warning);
}

.status-badge.inactive {
    background: rgba(248, 113, 113, 0.2);
    color: var(--color-danger);
}

/* ============================================
   EXAMINATIONS MODULE
   ============================================ */
.exam-tabs,
.staff-tabs,
.library-tabs {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--color-border);
    padding-bottom: var(--spacing-sm);
}

.tab-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: transparent;
    border: none;
    color: var(--color-text-muted);
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.tab-btn:hover {
    color: var(--color-text-primary);
    background: rgba(123, 104, 238, 0.1);
}

.tab-btn.active {
    color: var(--color-text-primary);
    background: rgba(123, 104, 238, 0.2);
}

.exam-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.exam-card {
    background: rgba(61, 30, 124, 0.4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
}

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

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

.exam-type {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(123, 104, 238, 0.2);
    border-radius: var(--radius-sm);
    color: var(--color-accent-light);
}

.exam-status {
    font-size: 0.75rem;
    font-weight: 600;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-full);
}

.exam-status.scheduled {
    background: rgba(96, 165, 250, 0.2);
    color: var(--color-info);
}

.exam-status.completed {
    background: rgba(74, 222, 128, 0.2);
    color: var(--color-success);
}

.exam-card h4 {
    margin-bottom: var(--spacing-md);
    font-size: 1.1rem;
}

.exam-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-lg);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.exam-progress {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.progress-bar {
    flex: 1;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
}

/* ============================================
   ATTENDANCE MODULE
   ============================================ */
.attendance-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.date-selector {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    background: rgba(61, 30, 124, 0.4);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.current-date {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    min-width: 150px;
    text-align: center;
}

.attendance-summary {
    display: flex;
    gap: var(--spacing-xl);
}

.summary-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.summary-value {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
}

.summary-value.present { color: var(--color-success); }
.summary-value.absent { color: var(--color-danger); }
.summary-value.leave { color: var(--color-warning); }

.summary-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.attendance-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
    gap: var(--spacing-lg);
}

.attendance-class {
    background: rgba(61, 30, 124, 0.4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.class-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    background: rgba(27, 10, 60, 0.5);
    border-bottom: 1px solid var(--color-border);
}

.class-header h4 {
    font-size: 1rem;
}

.attendance-rate {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-success);
}

.student-attendance-list {
    padding: var(--spacing-md);
}

.student-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-border);
}

.student-row:last-child {
    border-bottom: none;
}

/* Toggle Switch */
.toggle {
    position: relative;
    display: inline-block;
    width: 48px;
    height: 24px;
}

.toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-danger);
    border-radius: var(--radius-full);
    transition: var(--transition-fast);
}

.toggle-slider::before {
    content: '';
    position: absolute;
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background: white;
    border-radius: 50%;
    transition: var(--transition-fast);
}

.toggle input:checked + .toggle-slider {
    background: var(--color-success);
}

.toggle input:checked + .toggle-slider::before {
    transform: translateX(24px);
}

/* ============================================
   TIMETABLE MODULE
   ============================================ */
.timetable-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

.timetable-container {
    background: rgba(61, 30, 124, 0.4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    overflow-x: auto;
}

.timetable {
    width: 100%;
    min-width: 800px;
    border-collapse: collapse;
}

.timetable th,
.timetable td {
    padding: var(--spacing-md);
    text-align: center;
    border: 1px solid var(--color-border);
}

.timetable th {
    background: rgba(27, 10, 60, 0.7);
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.time-slot {
    font-weight: 600;
    background: rgba(27, 10, 60, 0.5);
    white-space: nowrap;
}

.period {
    min-height: 80px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    font-size: 0.875rem;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.period:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-md);
}

.period small {
    color: var(--color-text-muted);
    font-size: 0.75rem;
}

.period.math { background: rgba(123, 104, 238, 0.2); }
.period.science { background: rgba(74, 222, 128, 0.2); }
.period.english { background: rgba(251, 191, 36, 0.2); }
.period.hindi { background: rgba(248, 113, 113, 0.2); }
.period.computer { background: rgba(96, 165, 250, 0.2); }
.period.sports { background: rgba(167, 139, 250, 0.2); }
.period.art { background: rgba(244, 114, 182, 0.2); }

.break {
    background: rgba(27, 10, 60, 0.8);
}

.break-cell {
    font-weight: 600;
    color: var(--color-text-muted);
    letter-spacing: 2px;
}

/* ============================================
   FEE MANAGEMENT MODULE
   ============================================ */
.fee-summary-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.fee-card {
    background: rgba(61, 30, 124, 0.4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: all var(--transition-base);
}

.fee-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-accent);
}

.fee-card.pending {
    border-color: rgba(251, 191, 36, 0.3);
}

.fee-card.overdue {
    border-color: rgba(248, 113, 113, 0.3);
}

.fee-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    background: rgba(123, 104, 238, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
}

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

.fee-amount {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
}

.fee-label {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

/* ============================================
   STAFF MODULE
   ============================================ */
.staff-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.staff-card {
    background: rgba(61, 30, 124, 0.4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
}

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

.staff-avatar {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.staff-info h4 {
    margin-bottom: var(--spacing-xs);
    font-size: 1.1rem;
}

.staff-role {
    display: block;
    color: var(--color-accent-light);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
}

.staff-dept {
    display: block;
    color: var(--color-text-muted);
    font-size: 0.8rem;
    margin-bottom: var(--spacing-lg);
}

.staff-stats {
    display: flex;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md) 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.staff-stats .stat {
    display: flex;
    flex-direction: column;
}

.staff-stats .stat-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

.staff-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* ============================================
   TRANSPORT MODULE
   ============================================ */
.transport-overview {
    display: flex;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: rgba(61, 30, 124, 0.4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.transport-stat {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex: 1;
}

.transport-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    background: rgba(123, 104, 238, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
}

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

.transport-value {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
}

.transport-label {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.route-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.route-card {
    background: rgba(61, 30, 124, 0.4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
}

.route-card:hover {
    border-color: var(--color-accent);
}

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

.route-number {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
}

.route-status {
    font-size: 0.75rem;
    font-weight: 600;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-full);
}

.route-status.active {
    background: rgba(74, 222, 128, 0.2);
    color: var(--color-success);
}

.route-path {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.route-start,
.route-end {
    font-weight: 600;
    color: var(--color-text-primary);
}

.route-arrow {
    color: var(--color-text-muted);
}

.route-stops {
    background: rgba(123, 104, 238, 0.2);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
}

.route-meta {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.route-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* ============================================
   HOSTEL MODULE
   ============================================ */
.hostel-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.hostel-stat-card {
    background: rgba(61, 30, 124, 0.4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    transition: all var(--transition-base);
}

.hostel-stat-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-2px);
}

.hostel-stat-value {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    display: block;
    margin-bottom: var(--spacing-xs);
}

.hostel-stat-label {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.hostel-sections {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
}

.hostel-section h3 {
    margin-bottom: var(--spacing-lg);
    font-size: 1.25rem;
}

.room-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: var(--spacing-md);
}

.room-card {
    background: rgba(61, 30, 124, 0.4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    text-align: center;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.room-card:hover {
    transform: scale(1.05);
}

.room-card.occupied {
    border-color: rgba(74, 222, 128, 0.3);
}

.room-card.available {
    border-color: rgba(96, 165, 250, 0.3);
}

.room-number {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    display: block;
    margin-bottom: var(--spacing-xs);
}

.room-type {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    display: block;
    margin-bottom: var(--spacing-xs);
}

.room-status {
    font-size: 0.75rem;
    font-weight: 600;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
}

.room-card.occupied .room-status {
    background: rgba(74, 222, 128, 0.2);
    color: var(--color-success);
}

.room-card.available .room-status {
    background: rgba(96, 165, 250, 0.2);
    color: var(--color-info);
}

.mess-menu {
    background: rgba(61, 30, 124, 0.4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.menu-day {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.day-name {
    font-weight: 600;
    color: var(--color-accent-light);
    font-size: 1.1rem;
}

.meals {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.meal {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-border);
}

.meal:last-child {
    border-bottom: none;
}

.meal-time {
    font-weight: 600;
    color: var(--color-text-secondary);
}

.meal-item {
    color: var(--color-text-primary);
}

/* ============================================
   PARENT PORTAL MODULE
   ============================================ */
.portal-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.portal-card {
    background: rgba(61, 30, 124, 0.4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.portal-card.wide {
    grid-column: span 2;
}

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

.portal-header h3 {
    font-size: 1.25rem;
}

.children-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.child-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(27, 10, 60, 0.3);
    border-radius: var(--radius-md);
}

.child-avatar {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1.25rem;
}

.child-info {
    flex: 1;
}

.child-info h4 {
    margin-bottom: var(--spacing-xs);
    font-size: 1.1rem;
}

.child-info span {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.child-stats {
    display: flex;
    gap: var(--spacing-lg);
}

.child-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.child-stat .stat-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.child-stat .stat-value {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
}

.child-stat .stat-value.good {
    color: var(--color-success);
}

.update-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.update-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(27, 10, 60, 0.3);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.update-item:hover {
    background: rgba(123, 104, 238, 0.1);
}

.update-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    background: rgba(123, 104, 238, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.update-content {
    flex: 1;
}

.update-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xs);
}

.update-title {
    font-weight: 600;
    color: var(--color-text-primary);
}

.update-time {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* Performance Chart */
.performance-chart {
    padding: var(--spacing-lg) 0;
}

.subject-bars {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.subject-bar {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.subject-name {
    width: 120px;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.bar-container {
    flex: 1;
    height: 24px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
}

.subject-score {
    width: 60px;
    text-align: right;
    font-weight: 600;
    color: var(--color-text-primary);
}

/* ============================================
   MESSAGING MODULE
   ============================================ */
.messaging-layout {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: var(--spacing-lg);
    height: calc(100vh - 200px);
    min-height: 500px;
}

.message-sidebar {
    background: rgba(61, 30, 124, 0.4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

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

.message-header h3 {
    font-size: 1.1rem;
}

.message-filters {
    display: flex;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

.filter-btn {
    padding: var(--spacing-xs) var(--spacing-md);
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--color-text-muted);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
    background: rgba(123, 104, 238, 0.2);
    color: var(--color-text-primary);
}

.message-list {
    flex: 1;
    overflow-y: auto;
}

.message-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.message-item:hover {
    background: rgba(123, 104, 238, 0.1);
}

.message-item.unread {
    background: rgba(123, 104, 238, 0.15);
}

.message-avatar {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1rem;
}

.message-preview {
    flex: 1;
    min-width: 0;
}

.message-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xs);
}

.message-sender {
    font-weight: 600;
    color: var(--color-text-primary);
    font-size: 0.9rem;
}

.message-time {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.message-subject {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.message-content {
    background: rgba(61, 30, 124, 0.4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.message-empty {
    text-align: center;
    padding: var(--spacing-2xl);
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.5;
}

.message-empty h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-secondary);
}

.message-empty p {
    color: var(--color-text-muted);
}

/* ============================================
   LIBRARY MODULE
   ============================================ */
.library-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.library-stats {
    display: flex;
    gap: var(--spacing-xl);
}

.lib-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.lib-stat-value {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
}

.lib-stat-label {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.library-search {
    display: flex;
    gap: var(--spacing-md);
}

.search-input-lg {
    width: 400px;
    padding: var(--spacing-md) var(--spacing-lg);
    background: rgba(61, 30, 124, 0.5);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-size: 1rem;
}

.search-input-lg:focus {
    outline: none;
    border-color: var(--color-accent);
}

.book-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.book-card {
    background: rgba(61, 30, 124, 0.4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    display: flex;
    gap: var(--spacing-md);
    transition: all var(--transition-base);
}

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

.book-cover {
    width: 80px;
    height: 100px;
    background: rgba(123, 104, 238, 0.2);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    flex-shrink: 0;
}

.book-info {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.book-info h4 {
    font-size: 1rem;
    margin-bottom: var(--spacing-xs);
}

.book-author {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.book-meta {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: auto;
}

.book-category {
    font-size: 0.75rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(123, 104, 238, 0.2);
    border-radius: var(--radius-sm);
    color: var(--color-accent-light);
}

.book-status {
    font-size: 0.75rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-weight: 600;
}

.book-status.available {
    background: rgba(74, 222, 128, 0.2);
    color: var(--color-success);
}

.book-status.issued {
    background: rgba(251, 191, 36, 0.2);
    color: var(--color-warning);
}

/* ============================================
   RESPONSIVE DESIGN - COMPREHENSIVE
   ============================================ */

/* Large Desktop (1440px+) */
@media (min-width: 1440px) {
    .sidebar {
        width: 300px;
    }
    
    .main-content {
        margin-left: 300px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .dashboard-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .exam-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .staff-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .book-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Desktop (1200px - 1439px) */
@media (max-width: 1439px) {
    .sidebar {
        width: 280px;
    }
    
    .main-content {
        margin-left: 280px;
    }
}

/* Small Desktop / Large Tablet (992px - 1199px) */
@media (max-width: 1199px) {
    .sidebar {
        width: 260px;
    }
    
    .main-content {
        margin-left: 260px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .dashboard-card.wide {
        grid-column: span 1;
    }
    
    .hostel-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .hostel-sections {
        grid-template-columns: 1fr;
    }
    
    .portal-grid {
        grid-template-columns: 1fr;
    }
    
    .portal-card.wide {
        grid-column: span 1;
    }
    
    .exam-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .staff-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .book-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .fee-summary-cards {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .transport-overview {
        flex-wrap: wrap;
    }
    
    .transport-stat {
        min-width: 200px;
    }
}

/* Tablet (768px - 991px) */
@media (max-width: 991px) {
    .sidebar {
        transform: translateX(-100%);
        width: 280px;
        transition: transform 0.3s ease;
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .sidebar-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 99;
    }
    
    .sidebar-overlay.active {
        display: block;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .content-header {
        padding: 0 var(--spacing-md);
    }
    
    .content-area {
        padding: var(--spacing-md);
    }
    
    .messaging-layout {
        grid-template-columns: 1fr;
        height: auto;
        min-height: calc(100vh - 150px);
    }
    
    .message-sidebar {
        display: none;
    }
    
    .message-sidebar.mobile-visible {
        display: flex;
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        bottom: 0;
        z-index: 50;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    .stat-card {
        padding: var(--spacing-md);
    }
    
    .stat-icon {
        width: 48px;
        height: 48px;
        font-size: 1.5rem;
    }
    
    .stat-value {
        font-size: 1.5rem;
    }
    
    .exam-grid {
        grid-template-columns: 1fr;
    }
    
    .staff-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .book-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .fee-summary-cards {
        grid-template-columns: 1fr;
    }
    
    .hostel-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .transport-overview {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .transport-stat {
        width: 100%;
    }
    
    .data-table-container {
        overflow-x: auto;
    }
    
    .data-table {
        min-width: 800px;
    }
    
    .timetable-container {
        overflow-x: auto;
    }
    
    .timetable {
        min-width: 700px;
    }
    
    .module-header {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-md);
    }
    
    .module-actions {
        flex-wrap: wrap;
    }
    
    .module-filters {
        flex-wrap: wrap;
    }
    
    .filter-select,
    .search-input {
        flex: 1;
        min-width: 140px;
    }
    
    .attendance-header {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-md);
    }
    
    .attendance-summary {
        width: 100%;
        justify-content: space-between;
        flex-wrap: wrap;
    }
    
    .summary-item {
        flex: 1;
        min-width: 100px;
    }
    
    .attendance-grid {
        grid-template-columns: 1fr;
    }
    
    .library-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .library-stats {
        flex-direction: row;
        justify-content: space-between;
        flex-wrap: wrap;
    }
    
    .library-search {
        flex-direction: column;
    }
    
    .search-input-lg {
        width: 100%;
    }
    
    .portal-grid {
        grid-template-columns: 1fr;
    }
    
    .portal-card.wide {
        grid-column: span 1;
    }
    
    .child-card {
        flex-direction: column;
        text-align: center;
    }
    
    .child-stats {
        width: 100%;
        justify-content: center;
    }
    
    .hostel-sections {
        grid-template-columns: 1fr;
    }
    
    .room-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .route-card {
        padding: var(--spacing-md);
    }
    
    .route-path {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }
    
    .route-arrow {
        transform: rotate(90deg);
    }
    
    .route-meta {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .exam-tabs,
    .staff-tabs,
    .library-tabs {
        flex-wrap: wrap;
    }
    
    .tab-btn {
        flex: 1;
        min-width: 120px;
        text-align: center;
    }
    
    .bar-chart {
        padding-bottom: 40px;
    }
    
    .bar-stack {
        width: 30px;
    }
}

/* Mobile (576px - 767px) */
@media (max-width: 767px) {
    .login-container {
        margin: var(--spacing-md);
        padding: var(--spacing-lg);
    }
    
    .login-brand h1 {
        font-size: 2rem;
    }
    
    .dashboard {
        min-height: 100vh;
        min-height: 100dvh;
    }
    
    .content-header {
        height: auto;
        min-height: 60px;
        padding: var(--spacing-sm) var(--spacing-md);
        flex-wrap: wrap;
        gap: var(--spacing-sm);
    }
    
    .header-left h2 {
        font-size: 1.25rem;
    }
    
    .header-right {
        width: 100%;
        justify-content: space-between;
    }
    
    .search-box {
        flex: 1;
    }
    
    .search-box input {
        width: 100%;
    }
    
    .search-box input:focus {
        width: 100%;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-card {
        flex-direction: row;
        align-items: center;
    }
    
    .dashboard-card {
        padding: var(--spacing-md);
    }
    
    .admission-item,
    .event-item {
        flex-wrap: wrap;
    }
    
    .admission-date,
    .event-time {
        width: 100%;
        text-align: right;
        margin-top: var(--spacing-xs);
    }
    
    .event-date {
        width: 48px;
        height: 48px;
    }
    
    .event-day {
        font-size: 1.25rem;
    }
    
    .exam-card {
        padding: var(--spacing-md);
    }
    
    .exam-details {
        flex-direction: column;
    }
    
    .staff-grid {
        grid-template-columns: 1fr;
    }
    
    .staff-card {
        padding: var(--spacing-md);
    }
    
    .staff-stats {
        flex-direction: row;
        justify-content: space-around;
    }
    
    .book-grid {
        grid-template-columns: 1fr;
    }
    
    .book-card {
        flex-direction: row;
        align-items: center;
    }
    
    .book-cover {
        width: 60px;
        height: 80px;
        font-size: 2rem;
    }
    
    .hostel-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .hostel-stat-value {
        font-size: 1.75rem;
    }
    
    .room-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .fee-card {
        flex-direction: row;
        align-items: center;
    }
    
    .fee-icon {
        width: 48px;
        height: 48px;
        font-size: 1.5rem;
    }
    
    .fee-amount {
        font-size: 1.5rem;
    }
    
    .transport-overview {
        padding: var(--spacing-md);
    }
    
    .transport-icon {
        width: 48px;
        height: 48px;
        font-size: 1.5rem;
    }
    
    .transport-value {
        font-size: 1.5rem;
    }
    
    .library-stats {
        flex-direction: column;
        align-items: center;
    }
    
    .lib-stat {
        width: 100%;
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        padding: var(--spacing-sm) 0;
        border-bottom: 1px solid var(--color-border);
    }
    
    .lib-stat:last-child {
        border-bottom: none;
    }
    
    .subject-bar {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-xs);
    }
    
    .subject-name {
        width: 100%;
    }
    
    .subject-score {
        width: 100%;
        text-align: left;
    }
    
    .update-item {
        flex-wrap: wrap;
    }
    
    .update-content {
        min-width: 0;
    }
    
    .update-top {
        flex-wrap: wrap;
    }
    
    .message-empty {
        padding: var(--spacing-lg);
    }
    
    .empty-icon {
        font-size: 3rem;
    }
    
    .chart-container {
        height: 180px;
    }
    
    .bar-chart {
        padding-bottom: 30px;
    }
    
    .bar-stack {
        width: 24px;
        height: 140px;
    }
    
    .bar-label {
        font-size: 0.7rem;
    }
    
    .chart-legend {
        flex-wrap: wrap;
        gap: var(--spacing-sm);
    }
    
    .nav-section {
        margin-bottom: var(--spacing-md);
    }
    
    .nav-item {
        padding: var(--spacing-sm);
    }
    
    .nav-icon {
        font-size: 1.1rem;
    }
    
    .user-profile {
        flex-direction: column;
        text-align: center;
    }
    
    .sidebar-footer {
        padding: var(--spacing-md);
    }
}

/* Small Mobile (below 576px) */
@media (max-width: 575px) {
    :root {
        --spacing-xs: 0.2rem;
        --spacing-sm: 0.4rem;
        --spacing-md: 0.75rem;
        --spacing-lg: 1rem;
        --spacing-xl: 1.25rem;
        --spacing-2xl: 1.5rem;
    }
    
    html {
        font-size: 14px;
    }
    
    .login-container {
        padding: var(--spacing-md);
        margin: var(--spacing-sm);
    }
    
    .login-brand .logo-icon {
        font-size: 2.5rem;
    }
    
    .login-brand h1 {
        font-size: 1.75rem;
    }
    
    .btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.875rem;
    }
    
    .content-area {
        padding: var(--spacing-sm);
    }
    
    .stat-card {
        flex-direction: column;
        text-align: center;
        padding: var(--spacing-md);
    }
    
    .stat-icon {
        margin-bottom: var(--spacing-sm);
    }
    
    .dashboard-card {
        padding: var(--spacing-sm);
    }
    
    .card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }
    
    .admission-item {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-xs);
    }
    
    .admission-avatar {
        margin-bottom: var(--spacing-xs);
    }
    
    .event-item {
        flex-direction: column;
        text-align: center;
    }
    
    .event-date {
        margin-bottom: var(--spacing-xs);
    }
    
    .exam-card {
        padding: var(--spacing-sm);
    }
    
    .exam-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }
    
    .exam-progress {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-xs);
    }
    
    .staff-card {
        padding: var(--spacing-sm);
    }
    
    .staff-avatar {
        width: 56px;
        height: 56px;
        font-size: 1.25rem;
    }
    
    .staff-stats {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .book-card {
        flex-direction: column;
        text-align: center;
    }
    
    .book-cover {
        width: 80px;
        height: 100px;
        margin: 0 auto;
    }
    
    .book-meta {
        justify-content: center;
    }
    
    .hostel-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }
    
    .hostel-stat-card {
        padding: var(--spacing-sm);
    }
    
    .hostel-stat-value {
        font-size: 1.5rem;
    }
    
    .room-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }
    
    .room-card {
        padding: var(--spacing-sm);
    }
    
    .room-number {
        font-size: 1rem;
    }
    
    .mess-menu {
        padding: var(--spacing-sm);
    }
    
    .meal {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }
    
    .fee-card {
        flex-direction: column;
        text-align: center;
        padding: var(--spacing-sm);
    }
    
    .fee-icon {
        margin-bottom: var(--spacing-xs);
    }
    
    .transport-stat {
        flex-direction: column;
        text-align: center;
    }
    
    .transport-icon {
        margin-bottom: var(--spacing-xs);
    }
    
    .route-card {
        padding: var(--spacing-sm);
    }
    
    .route-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }
    
    .tab-btn {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.8rem;
        min-width: auto;
        flex: 1;
    }
    
    .data-table th,
    .data-table td {
        padding: var(--spacing-sm);
        font-size: 0.875rem;
    }
    
    .timetable th,
    .timetable td {
        padding: var(--spacing-xs);
        font-size: 0.75rem;
    }
    
    .period {
        min-height: 60px;
        font-size: 0.75rem;
    }
    
    .period small {
        font-size: 0.65rem;
    }
    
    .time-slot {
        font-size: 0.75rem;
        white-space: nowrap;
    }
    
    .attendance-class {
        padding: var(--spacing-xs);
    }
    
    .class-header {
        padding: var(--spacing-sm);
    }
    
    .student-row {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
        padding: var(--spacing-sm) 0;
    }
    
    .toggle {
        width: 40px;
        height: 20px;
    }
    
    .toggle-slider::before {
        height: 14px;
        width: 14px;
        left: 3px;
        bottom: 3px;
    }
    
    .toggle input:checked + .toggle-slider::before {
        transform: translateX(20px);
    }
    
    .date-selector {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .current-date {
        font-size: 1rem;
        min-width: auto;
    }
    
    .summary-value {
        font-size: 1.5rem;
    }
    
    .portal-card {
        padding: var(--spacing-sm);
    }
    
    .child-card {
        padding: var(--spacing-sm);
    }
    
    .child-avatar {
        width: 48px;
        height: 48px;
        font-size: 1rem;
    }
    
    .child-stats {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .update-item {
        padding: var(--spacing-sm);
    }
    
    .update-icon {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }
    
    .subject-bar {
        padding: var(--spacing-xs) 0;
    }
    
    .bar-container {
        height: 20px;
    }
    
    .chart-container {
        height: 150px;
    }
    
    .bar-stack {
        width: 20px;
        height: 120px;
    }
    
    .legend-item {
        font-size: 0.75rem;
    }
    
    .legend-color {
        width: 10px;
        height: 10px;
    }
    
    .sidebar-nav {
        padding: var(--spacing-xs);
    }
    
    .nav-label {
        font-size: 0.65rem;
        padding: var(--spacing-xs);
    }
    
    .nav-item {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.875rem;
    }
    
    .nav-icon {
        font-size: 1rem;
        width: 20px;
    }
    
    .sidebar-header {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .logo-text {
        font-size: 1.25rem;
    }
    
    .user-profile {
        flex-direction: row;
        text-align: left;
    }
    
    .user-avatar {
        width: 36px;
        height: 36px;
        font-size: 0.875rem;
    }
    
    .notification-btn {
        width: 36px;
        height: 36px;
    }
    
    .notification-badge {
        width: 16px;
        height: 16px;
        font-size: 0.6rem;
    }
    
    .module-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .module-actions .btn {
        width: 100%;
        justify-content: center;
    }
    
    .module-filters {
        flex-direction: column;
        width: 100%;
    }
    
    .filter-select,
    .search-input {
        width: 100%;
    }
}

/* Landscape Mobile */
@media (max-height: 500px) and (orientation: landscape) {
    .login-screen {
        padding: var(--spacing-md);
        align-items: flex-start;
        overflow-y: auto;
    }
    
    .login-container {
        margin: var(--spacing-md) auto;
    }
    
    .sidebar {
        overflow-y: auto;
    }
    
    .sidebar-nav {
        max-height: calc(100vh - 200px);
    }
    
    .content-area {
        min-height: auto;
    }
    
    .messaging-layout {
        height: auto;
        min-height: 400px;
    }
}

/* High DPI / Retina Displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .logo-icon,
    .stat-icon,
    .fee-icon,
    .transport-icon,
    .book-cover {
        image-rendering: -webkit-optimize-contrast;
    }
}

/* Reduced Motion Preference */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .login-screen::before {
        animation: none;
    }
    
    .logo-icon {
        animation: none;
    }
}

/* Print Styles */
@media print {
    .sidebar,
    .content-header,
    .btn,
    .nav-item,
    .sidebar-footer {
        display: none !important;
    }
    
    .main-content {
        margin-left: 0 !important;
    }
    
    .dashboard,
    .module {
        display: block !important;
    }
    
    .module {
        page-break-after: always;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
    
    .stat-card,
    .dashboard-card,
    .exam-card,
    .staff-card,
    .book-card {
        border: 1px solid #ccc !important;
        break-inside: avoid;
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--color-bg-secondary);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-accent);
}

/* Selection */
::selection {
    background: var(--color-accent);
    color: white;
}