/* =================================================================
   style.css — Web Tugas Perkuliahan
   Dark-mode, glassmorphism, modern design
   ================================================================= */

/* ─── CSS Variables ────────────────────────────────────────────── */
:root {
    /* Backgrounds */
    --bg-base:        #080e1a;
    --bg-surface:     #0d1729;
    --bg-card:        rgba(255,255,255,0.04);
    --bg-card-hover:  rgba(255,255,255,0.08);
    --bg-input:       rgba(255,255,255,0.06);
    --bg-sidebar:     #0a1220;

    /* Accents */
    --accent:         #6366f1;
    --accent-light:   #818cf8;
    --accent-glow:    rgba(99,102,241,0.25);
    --success:        #10b981;
    --success-bg:     rgba(16,185,129,0.12);
    --warning:        #f59e0b;
    --warning-bg:     rgba(245,158,11,0.12);
    --danger:         #ef4444;
    --danger-bg:      rgba(239,68,68,0.12);
    --info:           #3b82f6;

    /* Text */
    --text-primary:   #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted:     #64748b;

    /* Borders */
    --border:         rgba(255,255,255,0.08);
    --border-focus:   rgba(99,102,241,0.6);

    /* Shadows */
    --shadow-sm:      0 2px 8px rgba(0,0,0,0.3);
    --shadow-md:      0 8px 24px rgba(0,0,0,0.4);
    --shadow-lg:      0 20px 60px rgba(0,0,0,0.5);
    --shadow-accent:  0 8px 32px rgba(99,102,241,0.3);

    /* Sizing */
    --sidebar-w:      260px;
    --radius-sm:      8px;
    --radius-md:      12px;
    --radius-lg:      16px;
    --radius-xl:      24px;

    /* Transitions */
    --ease:           cubic-bezier(0.4,0,0.2,1);
    --duration:       0.2s;
}

/* ─── Reset & Base ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', system-ui, sans-serif;
    background: var(--bg-base);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
}

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

button { font-family: inherit; cursor: pointer; border: none; outline: none; }
input, textarea, select { font-family: inherit; }

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--text-muted); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }

/* ─── App Loader ────────────────────────────────────────────────── */
.app-loader {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    gap: 16px;
    color: var(--text-secondary);
}

.loader-ring {
    width: 44px;
    height: 44px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ─── Layout ────────────────────────────────────────────────────── */
.layout {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-w);
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 100;
    transition: transform var(--duration) var(--ease);
}

.sidebar-brand {
    padding: 28px 24px 20px;
    border-bottom: 1px solid var(--border);
}

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

.sidebar-brand-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--accent), #8b5cf6);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    box-shadow: var(--shadow-accent);
    flex-shrink: 0;
}

.sidebar-brand-text { flex: 1; }
.sidebar-brand-name {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 0.02em;
}
.sidebar-brand-sub {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 2px;
}

.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
    overflow-y: auto;
}

.nav-section-label {
    font-size: 10px;
    font-weight: 600;
    color: var(--text-muted);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 8px 12px 4px;
    margin-top: 8px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--duration) var(--ease);
    margin-bottom: 2px;
    text-decoration: none;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
}

.nav-item:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
}

.nav-item.active {
    background: var(--accent-glow);
    color: var(--accent-light);
    border: 1px solid rgba(99,102,241,0.2);
}

.nav-item .nav-icon {
    width: 20px;
    text-align: center;
    font-size: 16px;
    flex-shrink: 0;
}

.sidebar-footer {
    padding: 16px 12px;
    border-top: 1px solid var(--border);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    margin-bottom: 8px;
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), #8b5cf6);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    flex-shrink: 0;
}

.user-name  { font-size: 13px; font-weight: 600; color: var(--text-primary); }
.user-role  { font-size: 11px; color: var(--text-muted); }

.btn-logout {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 9px 12px;
    border-radius: var(--radius-sm);
    background: var(--danger-bg);
    color: var(--danger);
    font-size: 13px;
    font-weight: 500;
    transition: all var(--duration) var(--ease);
    border: 1px solid transparent;
}

.btn-logout:hover {
    background: var(--danger);
    color: #fff;
    border-color: var(--danger);
}

/* Main content */
.main-content {
    margin-left: var(--sidebar-w);
    flex: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Page header */
.page-header {
    padding: 32px 36px 0;
}

.page-title {
    font-size: 26px;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.page-subtitle {
    font-size: 14px;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* Page body */
.page-body {
    padding: 24px 36px 48px;
    flex: 1;
}

/* ─── Cards ─────────────────────────────────────────────────────── */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(12px);
    overflow: hidden;
}

.card-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}

.card-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
}

.card-body { padding: 24px; }

/* ─── Buttons ───────────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 9px 18px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 600;
    transition: all var(--duration) var(--ease);
    cursor: pointer;
    border: 1px solid transparent;
    line-height: 1;
    white-space: nowrap;
}

.btn:active { transform: scale(0.97); }

.btn-primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 0 0 0 var(--accent-glow);
}
.btn-primary:hover {
    background: var(--accent-light);
    box-shadow: var(--shadow-accent);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-secondary);
    border-color: var(--border);
}
.btn-secondary:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
}

.btn-success {
    background: var(--success-bg);
    color: var(--success);
    border-color: rgba(16,185,129,0.2);
}
.btn-success:hover { background: var(--success); color: #fff; }

.btn-danger {
    background: var(--danger-bg);
    color: var(--danger);
    border-color: rgba(239,68,68,0.2);
}
.btn-danger:hover { background: var(--danger); color: #fff; }

.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-lg { padding: 12px 24px; font-size: 15px; }
.btn-icon { padding: 8px; border-radius: var(--radius-sm); }
.btn-full { width: 100%; }

/* ─── Forms ─────────────────────────────────────────────────────── */
.form-group { margin-bottom: 18px; }

.form-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 14px;
    transition: border-color var(--duration) var(--ease),
                box-shadow var(--duration) var(--ease);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-control::placeholder { color: var(--text-muted); }

textarea.form-control {
    min-height: 120px;
    resize: vertical;
}

select.form-control option { background: #1e293b; }

.form-hint {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 5px;
}

/* ─── Table ─────────────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; }

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

thead th {
    padding: 12px 16px;
    text-align: left;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
    background: rgba(255,255,255,0.02);
    white-space: nowrap;
}

tbody tr {
    border-bottom: 1px solid var(--border);
    transition: background var(--duration) var(--ease);
}

tbody tr:last-child { border-bottom: none; }
tbody tr:hover { background: var(--bg-card-hover); }

tbody td {
    padding: 13px 16px;
    color: var(--text-primary);
    vertical-align: middle;
}

.td-actions {
    display: flex;
    gap: 6px;
    align-items: center;
}

/* ─── Badges ────────────────────────────────────────────────────── */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    border-radius: 99px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.badge-success  { background: var(--success-bg);  color: var(--success);  }
.badge-warning  { background: var(--warning-bg);  color: var(--warning);  }
.badge-danger   { background: var(--danger-bg);   color: var(--danger);   }
.badge-info     { background: rgba(59,130,246,0.12); color: var(--info); }
.badge-primary  { background: var(--accent-glow); color: var(--accent-light); }
.badge-default  { background: var(--bg-card-hover); color: var(--text-secondary); }

/* ─── Tugas cards (mahasiswa view) ─────────────────────────────── */
.tugas-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 4px;
}

.tugas-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    cursor: pointer;
    transition: all 0.25s var(--ease);
    position: relative;
    overflow: hidden;
}

.tugas-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--accent-glow), transparent);
    opacity: 0;
    transition: opacity 0.25s var(--ease);
}

.tugas-card:hover {
    border-color: rgba(99,102,241,0.4);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md), var(--shadow-accent);
}

.tugas-card:hover::before { opacity: 1; }

.tugas-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
}

.tugas-card-num {
    width: 40px;
    height: 40px;
    background: var(--accent-glow);
    border: 1px solid rgba(99,102,241,0.3);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
}

.tugas-card-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
    line-height: 1.4;
}

.tugas-card-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 16px;
}

.tugas-card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    font-size: 12px;
    color: var(--text-muted);
}

/* Progress bar */
.progress-bar-wrap {
    width: 100%;
    height: 4px;
    background: var(--border);
    border-radius: 99px;
    margin-top: 12px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--accent-light));
    border-radius: 99px;
    transition: width 0.5s var(--ease);
}

/* ─── Tema Accordion (Admin - Tugas View) ──────────────────────── */
.tema-list { display: flex; flex-direction: column; gap: 10px; }

.tema-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: border-color var(--duration) var(--ease);
}

.tema-item.open { border-color: rgba(99,102,241,0.3); }

.tema-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    cursor: pointer;
    transition: background var(--duration) var(--ease);
}

.tema-header:hover { background: var(--bg-card-hover); }

.tema-toggle {
    font-size: 12px;
    color: var(--text-muted);
    transition: transform 0.2s var(--ease);
    flex-shrink: 0;
}

.tema-item.open .tema-toggle { transform: rotate(90deg); color: var(--accent-light); }

.tema-name {
    flex: 1;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.tema-actions { display: flex; gap: 6px; }

.tema-body {
    display: none;
    padding: 0 16px 16px;
    animation: slideDown 0.2s var(--ease);
}

.tema-item.open .tema-body { display: block; }

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-8px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* Soal list inside tema */
.soal-list { display: flex; flex-direction: column; gap: 8px; margin-top: 12px; }

.soal-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 12px 14px;
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}

.soal-num {
    width: 24px;
    height: 24px;
    background: var(--accent-glow);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 700;
    color: var(--accent-light);
    flex-shrink: 0;
    margin-top: 1px;
}

.soal-text {
    flex: 1;
    font-size: 13px;
    color: var(--text-primary);
    line-height: 1.5;
}

.soal-actions { display: flex; gap: 4px; flex-shrink: 0; }

/* Add soal form inside tema */
.soal-form {
    padding: 14px;
    background: rgba(99,102,241,0.05);
    border: 1px dashed rgba(99,102,241,0.3);
    border-radius: var(--radius-sm);
    margin-top: 10px;
}

.soal-form-actions {
    display: flex;
    gap: 8px;
    margin-top: 10px;
}

/* ─── Import Dropzone ───────────────────────────────────────────── */
.dropzone {
    border: 2px dashed var(--border);
    border-radius: var(--radius-md);
    padding: 40px 24px;
    text-align: center;
    cursor: pointer;
    transition: all var(--duration) var(--ease);
    background: var(--bg-card);
}

.dropzone:hover, .dropzone.drag-over {
    border-color: var(--accent);
    background: var(--accent-glow);
}

.dropzone-icon { font-size: 40px; margin-bottom: 12px; }
.dropzone-label { font-size: 15px; font-weight: 600; color: var(--text-primary); }
.dropzone-hint  { font-size: 12px; color: var(--text-muted); margin-top: 6px; }

#excel-file-input { display: none; }

/* Preview table */
.import-preview {
    margin-top: 20px;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border);
}

.import-preview-header {
    padding: 12px 16px;
    background: var(--accent-glow);
    border-bottom: 1px solid var(--border);
    font-size: 13px;
    font-weight: 600;
    color: var(--accent-light);
}

/* ─── Kerjakan (mahasiswa answer) ───────────────────────────────── */
.kerjakan-layout {
    display: flex;
    gap: 24px;
    align-items: flex-start;
}

.kerjakan-sidebar {
    width: 220px;
    flex-shrink: 0;
    position: sticky;
    top: 20px;
}

.tema-tab-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.tema-tab {
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    color: var(--text-secondary);
    background: none;
    border: 1px solid transparent;
    text-align: left;
    width: 100%;
    transition: all var(--duration) var(--ease);
    display: flex;
    align-items: center;
    gap: 8px;
}

.tema-tab:hover { background: var(--bg-card-hover); color: var(--text-primary); }
.tema-tab.active {
    background: var(--accent-glow);
    color: var(--accent-light);
    border-color: rgba(99,102,241,0.3);
}

.tema-tab .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--border);
    flex-shrink: 0;
}

.tema-tab.done .dot { background: var(--success); }
.tema-tab.partial .dot { background: var(--warning); }

.kerjakan-main { flex: 1; min-width: 0; }

.soal-kerjakan {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.soal-kerjakan-item {
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: border-color var(--duration);
}

.soal-kerjakan-item:focus-within { border-color: rgba(99,102,241,0.4); }

.soal-kerjakan-num {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.soal-kerjakan-label {
    background: var(--accent-glow);
    border: 1px solid rgba(99,102,241,0.2);
    border-radius: var(--radius-sm);
    padding: 3px 10px;
    font-size: 11px;
    font-weight: 700;
    color: var(--accent-light);
}

.soal-kerjakan-pertanyaan {
    font-size: 14px;
    color: var(--text-primary);
    line-height: 1.6;
    margin-bottom: 14px;
}

.save-indicator {
    font-size: 11px;
    color: var(--success);
    margin-top: 6px;
    opacity: 0;
    transition: opacity 0.3s;
    display: flex;
    align-items: center;
    gap: 4px;
}

.save-indicator.visible { opacity: 1; }

/* ─── Rekap view ────────────────────────────────────────────────── */
.rekap-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
}

.rekap-tema-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 18px 20px;
    cursor: pointer;
    transition: all 0.2s var(--ease);
}

.rekap-tema-card:hover {
    border-color: rgba(99,102,241,0.4);
    background: var(--bg-card-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.rekap-tema-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.rekap-tema-sub {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.rekap-count {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 22px;
    font-weight: 800;
    color: var(--accent-light);
}

.rekap-count-label { font-size: 12px; color: var(--text-muted); margin-top: 2px; }

/* ─── Login page ────────────────────────────────────────────────── */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(ellipse at 30% 40%, rgba(99,102,241,0.15) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 70%, rgba(139,92,246,0.1) 0%, transparent 55%),
                var(--bg-base);
    padding: 24px;
}

.login-box {
    width: 100%;
    max-width: 420px;
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 40px;
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-lg);
}

.login-logo {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--accent), #8b5cf6);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin: 0 auto 24px;
    box-shadow: var(--shadow-accent);
}

.login-title {
    text-align: center;
    font-size: 22px;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    margin-bottom: 6px;
}

.login-subtitle {
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 32px;
}

.login-error {
    padding: 10px 14px;
    background: var(--danger-bg);
    border: 1px solid rgba(239,68,68,0.2);
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--danger);
    margin-bottom: 16px;
    display: none;
}

/* ─── Modal ─────────────────────────────────────────────────────── */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    animation: fadeIn 0.15s var(--ease);
}

.modal-backdrop.hidden { display: none; }

.modal-box {
    background: #141c2e;
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 520px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: scaleIn 0.2s var(--ease);
}

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

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title { font-size: 16px; font-weight: 700; color: var(--text-primary); }

.modal-close {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    cursor: pointer;
    transition: all var(--duration);
    flex-shrink: 0;
}

.modal-close:hover { background: var(--danger-bg); color: var(--danger); border-color: var(--danger); }

.modal-body    { padding: 24px; }
.modal-footer  { padding: 16px 24px; border-top: 1px solid var(--border); display: flex; gap: 10px; justify-content: flex-end; }

/* ─── Toast notifications ───────────────────────────────────────── */
#toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 10px;
    pointer-events: none;
}

.toast {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 18px;
    border-radius: var(--radius-md);
    background: #1e293b;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
    pointer-events: all;
    animation: toastIn 0.25s var(--ease);
    min-width: 260px;
    max-width: 380px;
}

.toast.success { border-color: rgba(16,185,129,0.3); }
.toast.error   { border-color: rgba(239,68,68,0.3); }
.toast.warning { border-color: rgba(245,158,11,0.3); }

.toast-icon { font-size: 16px; flex-shrink: 0; }
.toast.success .toast-icon { color: var(--success); }
.toast.error   .toast-icon { color: var(--danger);  }
.toast.warning .toast-icon { color: var(--warning); }

@keyframes toastIn {
    from { opacity: 0; transform: translateX(40px); }
    to   { opacity: 1; transform: translateX(0); }
}

/* ─── Empty state ───────────────────────────────────────────────── */
.empty-state {
    text-align: center;
    padding: 60px 24px;
    color: var(--text-muted);
}

.empty-state-icon { font-size: 48px; margin-bottom: 16px; }
.empty-state-title { font-size: 16px; font-weight: 600; color: var(--text-secondary); margin-bottom: 8px; }
.empty-state-desc  { font-size: 13px; }

/* ─── Stats row ─────────────────────────────────────────────────── */
.stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 16px;
    margin-bottom: 28px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 20px;
}

.stat-label { font-size: 12px; font-weight: 600; color: var(--text-muted); margin-bottom: 8px; text-transform: uppercase; letter-spacing: 0.06em; }
.stat-value { font-size: 28px; font-weight: 800; color: var(--text-primary); letter-spacing: -0.02em; }
.stat-sub   { font-size: 11px; color: var(--text-muted); margin-top: 4px; }

/* ─── Utility ───────────────────────────────────────────────────── */
.flex           { display: flex; }
.flex-wrap      { flex-wrap: wrap; }
.items-center   { align-items: center; }
.justify-between{ justify-content: space-between; }
.gap-2          { gap: 8px; }
.gap-3          { gap: 12px; }
.gap-4          { gap: 16px; }
.mt-2           { margin-top: 8px; }
.mt-3           { margin-top: 12px; }
.mt-4           { margin-top: 16px; }
.mb-4           { margin-bottom: 16px; }
.text-muted     { color: var(--text-muted); }
.text-sm        { font-size: 12px; }
.text-center    { text-align: center; }
.font-bold      { font-weight: 700; }
.hidden         { display: none !important; }

.divider {
    height: 1px;
    background: var(--border);
    margin: 20px 0;
}

/* ─── Responsive ────────────────────────────────────────────────── */
@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .main-content { margin-left: 0; }
    .page-header { padding: 20px 20px 0; }
    .page-body   { padding: 20px 20px 40px; }
    .kerjakan-layout { flex-direction: column; }
    .kerjakan-sidebar { width: 100%; position: static; }
    .stats-row { grid-template-columns: 1fr 1fr; }
}

/* ─── Mobile Header (Mahasiswa) ─────────────────────────────────── */
.mhs-header {
    background: var(--bg-sidebar);
    border-bottom: 1px solid var(--border);
    padding: 0 32px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky; top: 0; z-index: 50;
    gap: 16px;
}

.mhs-header-left {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
}

.mhs-header-right {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.mhs-header-logo {
    width: 36px; height: 36px;
    background: linear-gradient(135deg, var(--accent), #8b5cf6);
    border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
}

.mhs-header-brand {
    font-weight: 700;
    font-size: 15px;
    white-space: nowrap;
}

.mhs-header-user {
    font-size: 13px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 250px;
}

@media (max-width: 768px) {
    .mhs-header {
        padding: 0 16px;
        gap: 8px;
    }
    .mhs-header-logo {
        display: none; /* Hide logo to make room */
    }
    .mhs-header-brand {
        display: none; /* Hide brand to make room */
    }
    .mhs-header-user {
        max-width: 130px; /* Truncate name on small screens */
    }
}