:root {
    /* Birlik International School Theme Colors */
    --primary-blue: #0A3663;
    --secondary-blue: #1A5494;
    --accent-gold: #D4AF37;
    --accent-gold-light: #F3E5AB;
    --background-color: #F8F9FA;
    --card-surface: #FFFFFF;
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-light: #FFFFFF;
    --danger-red: #E74C3C;
    --success-green: #2ECC71;
    
    /* Neumorphic / Glassmorphic shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    
    --border-radius: 12px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', 'Segoe UI', sans-serif;
}

body {
    background-color: var(--background-color);
    color: var(--text-primary);
    display: flex;
    min-height: 100vh;
}

/* Sidebar Styling */
.sidebar {
    width: 260px;
    background: linear-gradient(180deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: var(--text-light);
    display: flex;
    flex-direction: column;
    padding: 20px 0;
    box-shadow: 4px 0 10px rgba(0, 0, 0, 0.1);
    z-index: 100;
}

.school-logo {
    text-align: center;
    padding: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 20px;
}

.school-logo h2 {
    color: var(--accent-gold);
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    margin-top: 10px;
}

.school-logo p {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.7);
}

.nav-links {
    list-style: none;
    flex-grow: 1;
}

.nav-item {
    padding: 15px 25px;
    display: flex;
    align-items: center;
    gap: 15px;
    cursor: pointer;
    transition: all 0.3s ease;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-weight: 500;
}

.nav-item:hover, .nav-item.active {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--accent-gold);
    border-left: 4px solid var(--accent-gold);
}

.nav-item i {
    font-size: 1.2rem;
}

/* Main Content Area */
.main-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

/* Header Styling */
.header {
    background-color: var(--card-surface);
    height: 80px;
    padding: 0 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-sm);
    z-index: 50;
}

.search-bar {
    display: flex;
    align-items: center;
    background-color: var(--background-color);
    padding: 10px 20px;
    border-radius: 30px;
    width: 400px;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.search-bar input {
    border: none;
    background: transparent;
    outline: none;
    margin-left: 10px;
    width: 100%;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.notification-btn {
    position: relative;
    background: none;
    border: none;
    font-size: 1.2rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.badge {
    position: absolute;
    top: -5px;
    right: -8px;
    background-color: var(--danger-red);
    color: white;
    font-size: 0.6rem;
    padding: 2px 6px;
    border-radius: 10px !important;  /* Always pill/circle */
    font-weight: bold;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 10px;
    padding-left: 20px;
    border-left: 1px solid #eee;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50% !important;  /* Always circular */
    background-color: var(--accent-gold);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-blue);
    font-weight: bold;
    flex-shrink: 0;
}

/* Page Content */
.page-container {
    padding: 40px;
    flex-grow: 1;
    overflow-y: auto;
}

.page-title {
    font-size: 1.8rem;
    color: var(--primary-blue);
    margin-bottom: 25px;
    font-weight: 700;
}

/* Dashboard Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.stat-card {
    background-color: var(--card-surface);
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    gap: 20px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border-top: 4px solid var(--accent-gold);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 50% !important;  /* Always a circle — never affected by theme border-radius */
    background-color: rgba(10, 54, 99, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: var(--primary-blue);
    flex-shrink: 0;
}

.stat-card.gold .stat-icon {
    background-color: var(--accent-gold-light);
    color: var(--accent-gold);
}

.stat-info h3 {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 5px;
    font-weight: 500;
}

.stat-info .value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-blue);
}

/* Tables */
.data-section {
    background-color: var(--card-surface);
    border-radius: var(--border-radius);
    padding: 25px;
    box-shadow: var(--shadow-sm);
}

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

.section-title {
    font-size: 1.2rem;
    color: var(--primary-blue);
    font-weight: 600;
}

.btn-primary {
    background-color: var(--primary-blue);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: background-color 0.3s;
    text-decoration: none;
    display: inline-block;
}

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

.table-responsive {
    overflow-x: auto;
}

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

th, td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

th {
    background-color: var(--background-color);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.9rem;
}

tr:hover td {
    background-color: rgba(10, 54, 99, 0.02);
}

/* Status Badges */
.status {
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    display: inline-block;
}

.status.issued {
    background-color: rgba(46, 204, 113, 0.1);
    color: var(--success-green);
}

.status.overdue {
    background-color: rgba(231, 76, 60, 0.1);
    color: var(--danger-red);
}

.status.pending {
    background-color: var(--accent-gold-light);
    color: #B8860B; /* Darker gold for text */
}

/* Input Fields */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    outline: none;
    transition: border-color 0.3s;
    font-family: inherit;
}

.form-control:focus {
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(10, 54, 99, 0.1);
}