/* ==========================================================
   STYLE DASHBOARD ADMIN - PEMBUAT KARTU PESERTA UJIAN
   Modern, Clean, Responsive UI
   ========================================================== */

:root {
    --primary: #16a34a;
    --primary-dark: #15803d;
    --primary-light: #f0fdf4;
    --secondary: #0284c7;
    --secondary-dark: #0369a1;
    --dark: #0f172a;
    --slate: #334155;
    --muted: #64748b;
    --light-bg: #f8fafc;
    --card-bg: #ffffff;
    --border: #e2e8f0;
    --danger: #ef4444;
    --warning: #f59e0b;
    --radius: 12px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.06), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: #f1f5f9;
    color: var(--slate);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Top App Header */
.app-header {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 50;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.header-inner {
    max-width: 1380px;
    margin: 0 auto;
    padding: 0.85rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.brand-section {
    display: flex;
    align-items: center;
    gap: 0.85rem;
}

.brand-badge {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 10px rgba(22, 163, 74, 0.3);
}

.brand-title h1 {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--dark);
    letter-spacing: -0.2px;
}

.brand-title p {
    font-size: 0.8rem;
    color: var(--muted);
}

.header-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--muted);
}

.status-dot {
    width: 8px;
    height: 8px;
    background-color: var(--primary);
    border-radius: 50%;
    display: inline-block;
    box-shadow: 0 0 0 3px rgba(22, 163, 74, 0.2);
}

/* Navigation Tabs */
.nav-tabs-wrapper {
    background: #ffffff;
    border-bottom: 1px solid var(--border);
}

.nav-tabs {
    max-width: 1380px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    gap: 0.5rem;
    overflow-x: auto;
}

.tab-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.85rem 1.25rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--muted);
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s;
}

.tab-btn:hover {
    color: var(--primary);
}

.tab-btn.active {
    color: var(--primary-dark);
    border-bottom-color: var(--primary);
}

.tab-btn .badge {
    background: #e2e8f0;
    color: #475569;
    font-size: 0.75rem;
    padding: 2px 7px;
    border-radius: 999px;
}

.tab-btn.active .badge {
    background: var(--primary-light);
    color: var(--primary-dark);
}

/* Main Container */
.main-container {
    max-width: 1380px;
    margin: 1.5rem auto;
    padding: 0 1.5rem;
    flex: 1;
    width: 100%;
}

/* Stats Cards Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.25rem;
    margin-bottom: 1.75rem;
}

.stat-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 1.25rem;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.stat-icon.green { background: #f0fdf4; color: #16a34a; }
.stat-icon.blue { background: #f0f9ff; color: #0284c7; }
.stat-icon.purple { background: #faf5ff; color: #9333ea; }
.stat-icon.amber { background: #fffbeb; color: #d97706; }

.stat-details h3 {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--muted);
    font-weight: 600;
}

.stat-details .value {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--dark);
    line-height: 1.2;
}

/* Content Panels */
.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
    animation: fadeIn 0.25s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Card Containers */
.panel-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    margin-bottom: 1.75rem;
    overflow: hidden;
}

.panel-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.panel-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--dark);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.panel-body {
    padding: 1.5rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    padding: 0.6rem 1.1rem;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: 8px;
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}
.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-secondary {
    background: #fff;
    color: var(--slate);
    border-color: var(--border);
}
.btn-secondary:hover {
    background: #f8fafc;
    border-color: #cbd5e1;
}

.btn-blue {
    background: var(--secondary);
    color: #fff;
}
.btn-blue:hover {
    background: var(--secondary-dark);
}

.btn-danger {
    background: #fee2e2;
    color: #b91c1c;
}
.btn-danger:hover {
    background: #fecaca;
}

.btn-warning {
    background: #fef3c7;
    color: #b45309;
    border-color: #fde68a;
}
.btn-warning:hover {
    background: #fde68a;
    color: #92400e;
}


.btn-sm {
    padding: 0.35rem 0.75rem;
    font-size: 0.8rem;
    border-radius: 6px;
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
}

/* Forms */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.25rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 0.4rem;
}

.form-group small {
    display: block;
    font-size: 0.775rem;
    color: var(--muted);
    margin-top: 0.3rem;
}

.form-control {
    width: 100%;
    padding: 0.65rem 0.9rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.9rem;
    font-family: inherit;
    color: var(--dark);
    background: #fff;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(22, 163, 74, 0.15);
}

/* Tables */
.table-responsive {
    width: 100%;
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.875rem;
}

.data-table th {
    background: #f8fafc;
    color: var(--slate);
    font-weight: 600;
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

.data-table td {
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}

.data-table tbody tr:hover {
    background: #f8fafc;
}

/* Class Print Cards Grid */
.class-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.25rem;
}

.class-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform 0.2s, box-shadow 0.2s;
}

.class-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: #cbd5e1;
}

.class-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.85rem;
}

.class-name {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--dark);
    line-height: 1.3;
}

.class-meta {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    margin-bottom: 1.25rem;
    font-size: 0.85rem;
    color: var(--muted);
}

.class-meta-item {
    display: flex;
    align-items: center;
    gap: 0.45rem;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.25rem 0.65rem;
    border-radius: 999px;
    font-size: 0.775rem;
    font-weight: 600;
}

.badge-success { background: #dcfce7; color: #15803d; }
.badge-info { background: #e0f2fe; color: #0369a1; }
.badge-warning { background: #fef3c7; color: #b45309; }

/* Upload Area */
.upload-zone {
    border: 2px dashed #cbd5e1;
    border-radius: var(--radius);
    background: #f8fafc;
    padding: 2.5rem 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
}

.upload-zone:hover, .upload-zone.dragover {
    border-color: var(--primary);
    background: #f0fdf4;
}

.upload-zone-icon {
    width: 60px;
    height: 60px;
    background: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    color: var(--primary);
    box-shadow: 0 4px 10px rgba(0,0,0,0.06);
}

.upload-zone h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 0.35rem;
}

.upload-zone p {
    font-size: 0.85rem;
    color: var(--muted);
    margin-bottom: 1rem;
}

/* Modals */
.modal-backdrop {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1rem;
}

.modal-backdrop.show {
    display: flex;
}

.modal-dialog {
    background: #fff;
    border-radius: 16px;
    max-width: 650px;
    width: 100%;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
    animation: modalPop 0.2s ease-out;
}

@keyframes modalPop {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

.modal-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--dark);
}

.modal-close {
    background: transparent;
    border: none;
    font-size: 1.25rem;
    color: var(--muted);
    cursor: pointer;
}

.modal-body {
    padding: 1.5rem;
    overflow-y: auto;
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

/* Toast Notification */
.toast-container {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.toast {
    background: #0f172a;
    color: #fff;
    padding: 0.85rem 1.25rem;
    border-radius: 10px;
    font-size: 0.9rem;
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
    display: flex;
    align-items: center;
    gap: 0.6rem;
    animation: slideUp 0.25s ease-out;
}

.toast.success { background: #166534; }
.toast.error { background: #991b1b; }

@keyframes slideUp {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}