@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800;900&family=Outfit:wght@400;500;600;700;800&display=swap');

:root {
    --bg-gradient: #F4F7FB;
    --sidebar-bg: rgba(255, 255, 255, 0.9);
    --card-bg: #FFFFFF;
    --glass-border: rgba(0, 0, 0, 0.06);
    
    --primary: #3F51B5;
    --primary-hover: #303F9F;
    --accent: #F59E0B;
    --success: #10B981;
    --danger: #EF4444;
    --info: #06B6D4;
    --purple: #8B5CF6;
    --pink: #EC4899;

    --text-main: #111827;
    --text-muted: #6B7280;

    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 10px;
    
    --shadow-soft: 0 10px 25px -5px rgba(0, 0, 0, 0.04), 0 4px 10px -2px rgba(0, 0, 0, 0.02);
    --shadow-hover: 0 20px 35px -10px rgba(63, 81, 181, 0.18);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
}

body {
    background: var(--bg-gradient);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    overflow-x: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.02);
}
::-webkit-scrollbar-thumb {
    background: rgba(63, 81, 181, 0.25);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

/* Glassmorphism Utilities */
.glass {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-soft);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: var(--radius-lg);
}

.glass:hover {
    box-shadow: var(--shadow-hover);
}

/* Layout */
.sidebar {
    width: 270px;
    height: calc(100vh - 2rem);
    position: fixed;
    top: 1rem;
    left: 1rem;
    padding: 1.75rem 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    z-index: 100;
    overflow-y: auto;
    border-radius: 28px;
    border: 1px solid rgba(0, 0, 0, 0.06);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.03);
}

.main-content {
    margin-left: 300px;
    padding: 2rem 2.5rem;
    width: calc(100% - 300px);
    max-width: 1600px;
}

/* Sidebar Branding */
.brand {
    font-size: 1.6rem;
    font-weight: 900;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 0.6rem;
    letter-spacing: -0.5px;
}

.brand span {
    color: var(--accent);
    font-weight: 400;
}

/* Navigation */
.nav-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    padding: 0.75rem 1.15rem;
    border-radius: 50px;
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 700;
    font-size: 0.92rem;
    transition: all 0.25s ease;
}

.nav-item:hover {
    background: rgba(63, 81, 181, 0.08);
    color: var(--primary);
}

.nav-item.active {
    background: #3F51B5 !important;
    color: #FFFFFF !important;
    border-radius: 50px !important;
    box-shadow: 0 8px 20px rgba(63, 81, 181, 0.35) !important;
}

.nav-item i {
    font-size: 1.2rem;
    width: 24px;
    text-align: center;
}

/* Header */
.top-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.page-title {
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--text-main);
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    background: white;
    padding: 0.5rem 1.25rem;
    border-radius: 50px;
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--glass-border);
}

/* Banner Card */
.dashboard-banner {
    background: linear-gradient(135deg, #3F51B5 0%, #4C51C6 60%, #5C6BC0 100%);
    color: white;
    padding: 2.25rem 2.5rem;
    border-radius: 28px;
    margin-bottom: 2rem;
    box-shadow: 0 15px 35px -5px rgba(63, 81, 181, 0.35);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.dashboard-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 350px;
    height: 350px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 50%;
    pointer-events: none;
}

.quick-action-pill {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    color: white;
    padding: 0.65rem 1.25rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.quick-action-pill:hover {
    background: white;
    color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.15);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
}

.stat-card:hover {
    transform: translateY(-6px);
}

.stat-value {
    font-size: 2.4rem;
    font-weight: 800;
    line-height: 1.1;
}

.stat-label {
    font-weight: 600;
    color: var(--text-muted);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Class Breakdown Cards */
.class-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.25rem;
}

.class-card {
    background: white;
    padding: 1.25rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--glass-border);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.class-card:hover {
    border-color: var(--primary);
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

/* Tables / Lists */
.data-table-wrapper {
    border-radius: var(--radius-lg);
    overflow: hidden;
    padding: 1.5rem;
}

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

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid rgba(0,0,0,0.04);
}

th {
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.05em;
}

tr:hover {
    background: rgba(79, 70, 229, 0.02);
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    border: none;
    font-family: inherit;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 15px rgba(79, 70, 229, 0.35);
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(79, 70, 229, 0.45);
}

.btn-sm {
    padding: 0.45rem 0.9rem;
    font-size: 0.85rem;
    border-radius: var(--radius-sm);
}

.btn-danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

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

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-main);
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(0,0,0,0.1);
    background: rgba(255,255,255,0.9);
    font-family: inherit;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.15);
    background: white;
}

/* Custom SVG Dashboard Charts & Lists styling */
svg {
    filter: drop-shadow(0px 8px 12px rgba(79, 70, 229, 0.12));
}

circle {
    transition: r 0.3s ease, fill 0.3s ease;
}

circle:hover {
    r: 8;
    fill: var(--accent) !important;
    cursor: pointer;
}

.doughnut-container svg circle {
    transition: stroke-dashoffset 1s ease-in-out;
}