/**
 * ALLROUND School Management System
 * Main Stylesheet
 */

/* ============================================
   RESET & BASE
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #1a237e;
    --primary-light: #3949ab;
    --primary-dark: #0d1440;
    --secondary: #004d40;
    --accent: #e65100;
    --success: #2e7d32;
    --danger: #c62828;
    --warning: #f57f17;
    --info: #0d47a1;
    --gray: #757575;
    --gray-light: #e0e0e0;
    --gray-dark: #424242;
    --bg: #f5f7fa;
    --white: #ffffff;
    --shadow: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-hover: 0 8px 25px rgba(0,0,0,0.12);
    --radius: 8px;
    --transition: all 0.3s ease;
    --sidebar-width: 260px;
    --header-height: 64px;
}

html {
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg);
    color: #333;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

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

a:hover {
    color: var(--primary-light);
}

/* ============================================
   CONTAINER
   ============================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
    flex: 1;
}

/* ============================================
   HEADER
   ============================================ */
.main-header {
    background: var(--white);
    box-shadow: 0 2px 4px rgba(0,0,0,0.06);
    padding: 10px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--header-height);
    display: flex;
    align-items: center;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo img {
    height: 38px;
    width: auto;
}

.logo-text {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary);
    letter-spacing: -0.3px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 14px;
    color: var(--gray);
}

.institution-name {
    font-weight: 500;
    color: #333;
    display: flex;
    align-items: center;
    gap: 10px;
}

.institution-name img {
    height: 28px;
    width: auto;
}

.academic-year {
    background: var(--bg);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

/* ============================================
   SIDEBAR LAYOUT
   ============================================ */
.app-layout {
    display: flex;
    min-height: calc(100vh - var(--header-height));
}

.sidebar {
    width: var(--sidebar-width);
    background: var(--white);
    border-right: 1px solid var(--gray-light);
    padding: 20px 0;
    position: sticky;
    top: var(--header-height);
    height: calc(100vh - var(--header-height));
    overflow-y: auto;
    flex-shrink: 0;
}

.sidebar-menu {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-menu li {
    margin: 2px 12px;
}

.sidebar-menu li a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    border-radius: var(--radius);
    color: #555;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
}

.sidebar-menu li a:hover {
    background: var(--bg);
    color: var(--primary);
}

.sidebar-menu li a.active {
    background: var(--primary);
    color: var(--white);
}

.sidebar-menu li a .icon {
    font-size: 18px;
    width: 24px;
    text-align: center;
}

.sidebar-menu .menu-label {
    font-size: 11px;
    text-transform: uppercase;
    color: var(--gray);
    padding: 16px 16px 8px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.main-content-area {
    flex: 1;
    padding: 24px 30px;
    overflow-y: auto;
    min-height: calc(100vh - var(--header-height));
}

/* ============================================
   ALERTS
   ============================================ */
.alert {
    padding: 16px 20px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    border-left: 4px solid transparent;
}

.alert-success {
    background: #e8f5e9;
    border-color: var(--success);
    color: #1b5e20;
}

.alert-danger {
    background: #ffebee;
    border-color: var(--danger);
    color: #b71c1c;
}

.alert-warning {
    background: #fff3e0;
    border-color: var(--warning);
    color: #e65100;
}

.alert-info {
    background: #e3f2fd;
    border-color: var(--info);
    color: #0d47a1;
}

/* ============================================
   FOOTER
   ============================================ */
.main-footer {
    background: var(--white);
    padding: 16px 0;
    border-top: 1px solid var(--gray-light);
    text-align: center;
    font-size: 13px;
    color: var(--gray);
    margin-top: auto;
}

/* ============================================
   FORMS
   ============================================ */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    font-size: 14px;
    color: #333;
}

.form-group .required {
    color: var(--danger);
    margin-left: 2px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid #d0d0d0;
    border-radius: var(--radius);
    font-size: 14px;
    transition: var(--transition);
    background: var(--white);
    font-family: inherit;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(26, 35, 126, 0.1);
}

.form-control.error {
    border-color: var(--danger);
}

.form-control.error:focus {
    box-shadow: 0 0 0 3px rgba(198, 40, 40, 0.1);
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23757575' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

textarea.form-control {
    resize: vertical;
    min-height: 80px;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    border: none;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    font-family: inherit;
    line-height: 1.4;
}

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

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

.btn-secondary {
    background: var(--gray-light);
    color: #333;
}

.btn-secondary:hover {
    background: #c8c8c8;
}

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

.btn-success:hover {
    background: #1b5e20;
    color: var(--white);
}

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

.btn-danger:hover {
    background: #b71c1c;
    color: var(--white);
}

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

.btn-warning:hover {
    background: #e65100;
    color: var(--white);
}

.btn-sm {
    padding: 6px 14px;
    font-size: 12px;
}

.btn-lg {
    padding: 14px 32px;
    font-size: 16px;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

/* ============================================
   TABLES
   ============================================ */
.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.table th {
    background: var(--bg);
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    color: #333;
    border-bottom: 2px solid var(--gray-light);
    white-space: nowrap;
}

.table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--gray-light);
    vertical-align: middle;
}

.table tr:hover td {
    background: #fafafa;
}

.table .actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.table .status-badge {
    display: inline-block;
    padding: 2px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.status-badge.active {
    background: #e8f5e9;
    color: #1b5e20;
}

.status-badge.inactive {
    background: #ffebee;
    color: #b71c1c;
}

.status-badge.pending {
    background: #fff3e0;
    color: #e65100;
}

.status-badge.enrolled {
    background: #e3f2fd;
    color: #0d47a1;
}

.status-badge.graduated {
    background: #e8f5e9;
    color: #1b5e20;
}

.status-badge.transferred {
    background: #f3e5f5;
    color: #6a1b9a;
}

/* ============================================
   CARDS
   ============================================ */
.card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    margin-bottom: 24px;
}

.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--gray-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.card-header h3 {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
}

.card-header .card-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.card-body {
    padding: 20px;
}

.card-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--gray-light);
    background: var(--bg);
}

/* ============================================
   STATS CARDS
   ============================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 20px 24px;
    box-shadow: var(--shadow);
    border-left: 4px solid var(--primary);
}

.stat-card .stat-number {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary);
}

.stat-card .stat-label {
    font-size: 14px;
    color: var(--gray);
    margin-top: 4px;
}

.stat-card .stat-icon {
    font-size: 28px;
    float: right;
    opacity: 0.6;
}

/* ============================================
   USER DROPDOWN
   ============================================ */
.user-dropdown {
    position: relative;
    cursor: pointer;
}

.user-dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 12px;
    border-radius: var(--radius);
    transition: var(--transition);
    background: transparent;
    border: none;
    font-family: inherit;
    font-size: 14px;
    cursor: pointer;
}

.user-dropdown-toggle:hover {
    background: var(--bg);
}

.user-dropdown-toggle .avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 14px;
}

.user-dropdown-menu {
    position: absolute;
    right: 0;
    top: 100%;
    min-width: 220px;
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: 0 8px 30px rgba(0,0,0,0.15);
    padding: 8px 0;
    display: none;
    z-index: 1000;
    margin-top: 8px;
}

.user-dropdown-menu.show {
    display: block;
}

.user-dropdown-menu .dropdown-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    color: #333;
    font-size: 14px;
    transition: var(--transition);
    cursor: pointer;
    text-decoration: none;
    border: none;
    background: transparent;
    width: 100%;
    text-align: left;
    font-family: inherit;
}

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

.user-dropdown-menu .dropdown-divider {
    height: 1px;
    background: var(--gray-light);
    margin: 6px 12px;
}

.user-dropdown-menu .dropdown-header {
    padding: 8px 16px;
    font-weight: 600;
    color: #333;
    font-size: 14px;
}

.user-dropdown-menu .dropdown-header small {
    display: block;
    font-weight: normal;
    color: var(--gray);
    font-size: 12px;
}

/* ============================================
   GRID SYSTEM
   ============================================ */
.row {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 20px;
}

.col-1 { grid-column: span 1; }
.col-2 { grid-column: span 2; }
.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-9 { grid-column: span 9; }
.col-10 { grid-column: span 10; }
.col-11 { grid-column: span 11; }
.col-12 { grid-column: span 12; }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
    .row {
        gap: 16px;
    }
}

@media (max-width: 768px) {
    .sidebar {
        display: none;
        position: fixed;
        top: var(--header-height);
        left: 0;
        width: 280px;
        height: calc(100vh - var(--header-height));
        z-index: 99;
        background: var(--white);
        box-shadow: 2px 0 12px rgba(0,0,0,0.1);
    }
    
    .sidebar.open {
        display: block;
    }
    
    .sidebar-overlay {
        display: none;
        position: fixed;
        top: var(--header-height);
        left: 0;
        width: 100%;
        height: calc(100vh - var(--header-height));
        background: rgba(0,0,0,0.4);
        z-index: 98;
    }
    
    .sidebar-overlay.show {
        display: block;
    }
    
    .main-content-area {
        padding: 16px;
    }
    
    .row {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .col-1, .col-2, .col-3, .col-4, .col-5, .col-6,
    .col-7, .col-8, .col-9, .col-10, .col-11, .col-12 {
        grid-column: 1 / -1;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .header-content {
        flex-wrap: wrap;
        gap: 8px;
    }
    
    .logo-text {
        font-size: 16px;
    }
    
    .institution-name {
        font-size: 12px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .mobile-menu-btn {
        display: block !important;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 12px;
    }
    
    .main-content-area {
        padding: 12px;
    }
    
    .card-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .table {
        font-size: 13px;
    }
    
    .table th,
    .table td {
        padding: 8px 10px;
    }
}

/* ============================================
   UTILITY
   ============================================ */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }

.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }

.ml-1 { margin-left: 8px; }
.ml-2 { margin-left: 16px; }

.mr-1 { margin-right: 8px; }
.mr-2 { margin-right: 16px; }

.p-1 { padding: 8px; }
.p-2 { padding: 16px; }
.p-3 { padding: 24px; }

.d-flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.gap-3 { gap: 24px; }

.w-100 { width: 100%; }
.h-100 { height: 100%; }

.text-muted { color: var(--gray); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.text-primary { color: var(--primary); }

.bg-white { background: var(--white); }
.bg-light { background: var(--bg); }

.rounded { border-radius: var(--radius); }
.shadow { box-shadow: var(--shadow); }

.hidden { display: none; }

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    background: transparent;
    border: none;
    font-size: 24px;
    cursor: pointer;
    padding: 4px 8px;
    color: #333;
}