/* ==========================================================================
   Design System: Institutional Excellence
   Universitas Brawijaya Academic & Administrative Theme
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Public+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&family=Space+Grotesk:wght@500;600;700&display=swap');

:root {
    /* Color Palette */
    --surface: #f8f9fa;
    --surface-dim: #d9dadb;
    --surface-bright: #f8f9fa;
    --surface-container-lowest: #ffffff;
    --surface-container-low: #f3f4f5;
    --surface-container: #edeeef;
    --surface-container-high: #e7e8e9;
    --surface-container-highest: #e1e3e4;
    --on-surface: #191c1d;
    --on-surface-variant: #43474f;
    --inverse-surface: #2e3132;
    --inverse-on-surface: #f0f1f2;
    --outline: #737780;
    --outline-variant: #c3c6d1;
    --surface-tint: #3a5f94;

    /* Brand Primary & Secondary */
    --primary: #001e40;
    --primary-blue: #003366;
    --on-primary: #ffffff;
    --primary-container: #003366;
    --on-primary-container: #799dd6;
    --inverse-primary: #a7c8ff;

    --secondary: #745b00;
    --secondary-gold: #fecb00;
    --secondary-gold-bright: #ffcc00;
    --on-secondary: #ffffff;
    --secondary-container: #fecb00;
    --on-secondary-container: #6e5700;

    --tertiary: #001e41;
    --on-tertiary: #ffffff;
    --tertiary-container: #003367;
    --on-tertiary-container: #649df0;

    --error: #ba1a1a;
    --on-error: #ffffff;
    --error-container: #ffdad6;
    --on-error-container: #93000a;

    --primary-color: #003366;
    --secondary-color: #fecb00;
    --dark-color: #001e40;
    --light-color: #f8f9fa;

    /* Typography */
    --font-sans: 'Public Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'Space Grotesk', ui-monospace, SFMono-Regular, Menlo, monospace;

    /* Radius & Spacing */
    --radius-sm: 0.125rem;
    --radius-default: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-full: 9999px;

    --shadow-level1: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-level2: 0 4px 12px rgba(0, 0, 0, 0.05);
    --border-subtle: 1px solid #e9ecef;
}

/* Base Reset */
html, body {
    font-family: var(--font-sans);
    background-color: var(--surface);
    color: var(--on-surface);
    font-size: 14px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6, .h1, .h2, .h3, .h4, .h5, .h6 {
    font-family: var(--font-sans);
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -0.01em;
}

a {
    color: var(--primary-blue);
    text-decoration: none;
    transition: color 0.15s ease-in-out;
}
a:hover {
    color: #001e40;
}

/* Numeric / Technical Data */
.data-mono, .badge, .stats-value, .score, .rank, .timer-display, table td[data-order], .exam-timer {
    font-family: var(--font-mono);
}

/* Cards (Level 1 Elevation) */
.card, .admin-card, .stats-card, .activity-card, .scores-card, .users-card {
    background: var(--surface-container-lowest) !important;
    border: var(--border-subtle) !important;
    border-radius: var(--radius-default) !important;
    box-shadow: var(--shadow-level1) !important;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.card:hover, .stats-card:hover {
    box-shadow: var(--shadow-level2) !important;
}

.card-header {
    background-color: var(--surface-container-lowest) !important;
    border-bottom: var(--border-subtle) !important;
    color: var(--primary) !important;
    font-weight: 600;
    padding: 0.875rem 1.25rem;
}

.admin-card .card-header {
    background: var(--primary) !important;
    color: var(--on-primary) !important;
    border-bottom: 2px solid var(--secondary-gold) !important;
}

/* Buttons */
.btn {
    font-family: var(--font-sans);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.04em;
    border-radius: var(--radius-default);
    padding: 0.5rem 1rem;
    transition: all 0.15s ease;
}

.btn-primary {
    background-color: var(--primary-blue) !important;
    border-color: var(--primary-blue) !important;
    color: #ffffff !important;
}
.btn-primary:hover, .btn-primary:focus {
    background-color: var(--primary) !important;
    border-color: var(--primary) !important;
    color: #ffffff !important;
}

.btn-outline-primary {
    color: var(--primary-blue) !important;
    border-color: var(--primary-blue) !important;
    background: transparent !important;
}
.btn-outline-primary:hover {
    background-color: var(--primary-blue) !important;
    color: #ffffff !important;
}

.btn-warning, .btn-secondary-gold {
    background-color: var(--secondary-gold) !important;
    border-color: var(--secondary-gold) !important;
    color: #241a00 !important;
    font-weight: 700;
}
.btn-warning:hover {
    background-color: #e5b700 !important;
    border-color: #e5b700 !important;
    color: #241a00 !important;
}

.btn-danger {
    background-color: var(--error) !important;
    border-color: var(--error) !important;
    color: #ffffff !important;
}

/* Form Controls */
.form-control, .form-select {
    font-family: var(--font-sans);
    font-size: 14px;
    border-radius: var(--radius-default);
    border: 1px solid var(--outline-variant);
    background-color: var(--surface-container-lowest);
    color: var(--on-surface);
    padding: 0.5rem 0.75rem;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(0, 51, 102, 0.15);
}

.form-label {
    font-weight: 600;
    font-size: 12px;
    color: var(--on-surface-variant);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 0.35rem;
}

/* Status Badges */
.badge {
    border-radius: var(--radius-lg) !important;
    padding: 0.35em 0.65em !important;
    font-size: 11px !important;
    font-weight: 600 !important;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.badge.bg-success {
    background-color: #e8f5e9 !important;
    color: #1b5e20 !important;
    border: 1px solid #c8e6c9;
}

.badge.bg-warning {
    background-color: #fff8e1 !important;
    color: #b78103 !important;
    border: 1px solid #ffe082;
}

.badge.bg-danger {
    background-color: var(--error-container) !important;
    color: var(--on-error-container) !important;
    border: 1px solid #ffcdd2;
}

.badge.bg-primary {
    background-color: #e3f2fd !important;
    color: var(--primary-blue) !important;
    border: 1px solid #bbdefb;
}

.badge.bg-info {
    background-color: #e0f7fa !important;
    color: #006064 !important;
    border: 1px solid #b2ebf2;
}

.badge.bg-secondary {
    background-color: var(--surface-container-high) !important;
    color: var(--on-surface-variant) !important;
    border: 1px solid var(--outline-variant);
}

/* Top Navbar */
.navbar-dark.bg-dark, header .navbar {
    background-color: var(--primary) !important;
    border-bottom: 3px solid var(--secondary-gold);
    box-shadow: var(--shadow-level1);
}

.navbar-brand {
    font-weight: 700;
    font-size: 15px;
    letter-spacing: -0.01em;
    color: #ffffff !important;
}

.navbar-dark .navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.85);
    font-weight: 500;
    font-size: 13px;
    padding: 0.6rem 0.9rem;
    border-radius: var(--radius-default);
    transition: all 0.15s ease;
}

.navbar-dark .navbar-nav .nav-link:hover,
.navbar-dark .navbar-nav .nav-link.active {
    color: #ffffff !important;
    background-color: rgba(255, 255, 255, 0.1);
}

/* Persistent Admin Sidebar */
.admin-sidebar {
    background-color: var(--primary) !important;
    min-height: calc(100vh - 56px);
    border-right: 1px solid rgba(255, 255, 255, 0.08);
    padding: 1rem 0;
}

.admin-sidebar h5 {
    color: var(--secondary-gold) !important;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 700;
    padding: 0.5rem 1.25rem;
    margin-bottom: 0.5rem;
}

.admin-sidebar .nav-link {
    color: rgba(255, 255, 255, 0.75) !important;
    font-weight: 500;
    font-size: 13px;
    padding: 0.65rem 1.25rem !important;
    border-left: 3px solid transparent;
    border-radius: 0 !important;
    transition: all 0.15s ease;
    display: flex;
    align-items: center;
}

.admin-sidebar .nav-link i {
    width: 20px;
    margin-right: 0.75rem;
    font-size: 14px;
    opacity: 0.85;
}

.admin-sidebar .nav-link:hover {
    color: #ffffff !important;
    background-color: rgba(255, 255, 255, 0.06) !important;
    border-left-color: rgba(254, 203, 0, 0.5);
}

.admin-sidebar .nav-link.active {
    color: #ffffff !important;
    background-color: var(--primary-container) !important;
    border-left-color: var(--secondary-gold) !important;
    font-weight: 600;
}

.admin-sidebar .nav-link.active i {
    color: var(--secondary-gold);
    opacity: 1;
}

/* Content Area */
.admin-content {
    background-color: var(--surface);
    padding: 1.75rem 2rem;
    min-height: calc(100vh - 56px);
}

/* Breadcrumb */
.breadcrumb {
    font-size: 12px;
    margin-bottom: 0;
}
.breadcrumb-item a {
    color: var(--primary-blue);
    font-weight: 500;
}
.breadcrumb-item.active {
    color: var(--outline);
}

/* Data Tables */
.table {
    font-size: 13px;
    color: var(--on-surface);
    border-color: #e9ecef;
}

.table thead th, .table-dark th {
    background-color: var(--primary) !important;
    color: #ffffff !important;
    font-weight: 600;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.75rem 1rem !important;
    border-color: rgba(255, 255, 255, 0.1) !important;
    vertical-align: middle;
}

.table tbody tr:hover {
    background-color: var(--surface-container-low) !important;
}

.table td {
    padding: 0.65rem 1rem !important;
    vertical-align: middle;
}

/* DataTables Pagination & Controls */
.dataTables_wrapper .dataTables_length select,
.dataTables_wrapper .dataTables_filter input {
    border: 1px solid var(--outline-variant);
    border-radius: var(--radius-default);
    padding: 0.35rem 0.5rem;
    font-size: 13px;
}

.dataTables_wrapper .dataTables_paginate .paginate_button.current {
    background: var(--primary) !important;
    border-color: var(--primary) !important;
    color: #ffffff !important;
    border-radius: var(--radius-default);
}

.dataTables_wrapper .dataTables_paginate .paginate_button:hover {
    background: var(--primary-container) !important;
    border-color: var(--primary-container) !important;
    color: #ffffff !important;
}

/* Footer */
footer {
    background-color: var(--primary) !important;
    color: rgba(255, 255, 255, 0.8) !important;
    border-top: 3px solid var(--secondary-gold);
    padding: 2rem 0 1.5rem !important;
    font-size: 13px;
}

footer h5 {
    color: var(--secondary-gold) !important;
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}

footer hr {
    border-color: rgba(255, 255, 255, 0.15) !important;
}

footer a.nav-link, footer .link-light {
    color: rgba(255, 255, 255, 0.75) !important;
}

footer a.nav-link:hover, footer .link-light:hover {
    color: var(--secondary-gold) !important;
}

/* Modals */
.modal-content {
    border-radius: var(--radius-default) !important;
    border: var(--border-subtle) !important;
    box-shadow: var(--shadow-level2) !important;
}
.modal-header {
    background-color: var(--primary) !important;
    color: #ffffff !important;
    border-bottom: 2px solid var(--secondary-gold) !important;
}
.modal-header .modal-title {
    color: #ffffff !important;
    font-size: 15px;
}
.modal-header .btn-close {
    filter: invert(1) grayscale(100%) brightness(200%);
}

/* Alerts */
.alert {
    border-radius: var(--radius-default) !important;
    font-size: 13px;
    font-weight: 500;
}
.alert-success {
    background-color: #e8f5e9 !important;
    color: #1b5e20 !important;
    border: 1px solid #c8e6c9 !important;
}
.alert-danger {
    background-color: var(--error-container) !important;
    color: var(--on-error-container) !important;
    border: 1px solid #ffcdd2 !important;
}
.alert-warning {
    background-color: #fff8e1 !important;
    color: #8f6400 !important;
    border: 1px solid #ffe082 !important;
}
.alert-info {
    background-color: #e3f2fd !important;
    color: #003366 !important;
    border: 1px solid #bbdefb !important;
}

/* SweetAlert2 Styling */
.swal2-popup {
    font-family: var(--font-sans) !important;
    border-radius: var(--radius-default) !important;
    border-top: 4px solid var(--secondary-gold) !important;
}
.swal2-confirm.btn-primary, .swal2-confirm {
    background-color: var(--primary-blue) !important;
    border-radius: var(--radius-default) !important;
    font-family: var(--font-sans) !important;
    font-weight: 600 !important;
}