/* ===== CSS Variables ===== */
:root {
    --primary: #6366f1;
    --primary-hover: #5558e6;
    --primary-bg: rgba(99, 102, 241, 0.1);
    --secondary: #10b981;
    --secondary-bg: rgba(16, 185, 129, 0.1);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.1);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.1);
    --purple: #8b5cf6;
    --purple-bg: rgba(139, 92, 246, 0.1);
    --bg: #f8fafc;
    --surface: #ffffff;
    --border: #e2e8f0;
    --text: #1e293b;
    --text-secondary: #64748b;
    --sidebar-bg: #1e293b;
    --sidebar-text: #cbd5e1;
    --sidebar-active: #6366f1;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);
    --transition: all 0.3s ease;
    --sidebar-width: 260px;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}
a { color: var(--primary); text-decoration: none; cursor: pointer; }
a:hover { color: var(--primary-hover); }
img { max-width: 100%; }
table { width: 100%; border-collapse: collapse; }

/* ===== Views ===== */
.view { display: none; min-height: 100vh; }
.view.active { display: block; }

/* ===== Buttons ===== */
.btn {
    display: inline-flex; align-items: center; gap: 0.5rem;
    padding: 0.625rem 1.25rem; border: none; border-radius: var(--radius-sm);
    font-size: 0.875rem; font-weight: 600; cursor: pointer;
    transition: var(--transition); white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(99,102,241,0.4); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; transform: none; box-shadow: none; }
.btn-ghost { background: transparent; color: var(--text-secondary); border: 1px solid var(--border); }
.btn-ghost:hover { background: var(--bg); color: var(--text); }
.btn-block { width: 100%; justify-content: center; }
.btn-sm { padding: 0.375rem 0.75rem; font-size: 0.8125rem; }
.btn-toggle-password {
    position: absolute; right: 0.75rem; top: 50%; transform: translateY(-50%);
    background: none; border: none; color: var(--text-secondary); cursor: pointer; padding: 0.25rem;
}

/* ===== Badges ===== */
.badge {
    display: inline-flex; align-items: center; padding: 0.25rem 0.75rem;
    border-radius: 20px; font-size: 0.75rem; font-weight: 600;
}
.badge-blue { background: var(--primary-bg); color: var(--primary); }
.badge-green { background: var(--secondary-bg); color: var(--secondary); }
.badge-red { background: var(--danger-bg); color: var(--danger); }
.badge-amber { background: var(--warning-bg); color: var(--warning); }
.badge-purple { background: var(--purple-bg); color: var(--purple); }
.badge-gray { background: #f1f5f9; color: var(--text-secondary); }
.badge-guru { background: var(--primary-bg); color: var(--primary); font-size: 0.7rem; }
.badge-siswa { background: var(--secondary-bg); color: var(--secondary); font-size: 0.7rem; }

/* ===== Login / Register ===== */
.login-container {
    display: flex; justify-content: center; align-items: center;
    min-height: 100vh; padding: 2rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}
.login-card {
    background: var(--surface); border-radius: var(--radius); padding: 2.5rem;
    width: 100%; max-width: 420px; box-shadow: var(--shadow-lg);
}
.login-header { text-align: center; margin-bottom: 2rem; }
.login-logo {
    width: 64px; height: 64px; border-radius: 16px;
    background: var(--primary-bg); color: var(--primary);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.75rem; margin: 0 auto 1rem;
}
.login-title { font-size: 1.75rem; font-weight: 800; color: var(--text); }
.login-subtitle { color: var(--text-secondary); font-size: 0.875rem; margin-top: 0.25rem; }
.login-footer { text-align: center; margin-top: 1.5rem; font-size: 0.875rem; color: var(--text-secondary); }
.demo-accounts {
    margin-top: 1.5rem; padding: 1rem; background: var(--bg);
    border-radius: var(--radius-sm); font-size: 0.8rem;
}
.demo-title { font-weight: 600; margin-bottom: 0.5rem; color: var(--text-secondary); }
.demo-item { display: flex; align-items: center; gap: 0.5rem; margin-top: 0.375rem; color: var(--text-secondary); }

/* ===== Forms ===== */
.form-group { margin-bottom: 1rem; }
.form-label { display: block; font-weight: 600; font-size: 0.875rem; margin-bottom: 0.375rem; color: var(--text); }
.input-group { position: relative; }
.input-icon { position: absolute; left: 0.875rem; top: 50%; transform: translateY(-50%); color: var(--text-secondary); font-size: 0.875rem; z-index: 1; }
.form-input, .form-select, .form-textarea {
    width: 100%; padding: 0.75rem 0.875rem 0.75rem 2.5rem;
    border: 2px solid var(--border); border-radius: var(--radius-sm);
    font-size: 0.875rem; transition: var(--transition);
    background: var(--surface); color: var(--text);
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
    outline: none; border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-bg);
}
.form-textarea { min-height: 80px; resize: vertical; }
.form-select { appearance: auto; }

/* Modal forms */
.form-group-modal { margin-bottom: 1rem; }
.form-group-modal .form-input,
.form-group-modal .form-select,
.form-group-modal .form-textarea {
    padding-left: 0.875rem;
}
.form-group-modal .form-label { margin-bottom: 0.375rem; }
.form-row-modal { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }

.error-msg {
    display: none; padding: 0.75rem 1rem; background: var(--danger-bg);
    color: var(--danger); border-radius: var(--radius-sm); font-size: 0.875rem;
    margin-bottom: 1rem; border: 1px solid rgba(239,68,68,0.2);
}
.success-msg {
    display: none; padding: 0.75rem 1rem; background: var(--secondary-bg);
    color: var(--secondary); border-radius: var(--radius-sm); font-size: 0.875rem;
    margin-bottom: 1rem; border: 1px solid rgba(16,185,129,0.2);
}

/* Role Selection */
.role-selection { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }
.role-option {
    display: flex; flex-direction: column; align-items: center; gap: 0.5rem;
    padding: 1rem; border: 2px solid var(--border); border-radius: var(--radius-sm);
    cursor: pointer; transition: var(--transition); text-align: center;
}
.role-option:hover { border-color: var(--primary); background: var(--primary-bg); }
.role-option.active { border-color: var(--primary); background: var(--primary-bg); color: var(--primary); }
.role-option i { font-size: 1.5rem; }
.role-option span { font-weight: 600; font-size: 0.875rem; }

/* ===== Mobile Header ===== */
.mobile-header {
    display: none; position: fixed; top: 0; left: 0; right: 0;
    height: 56px; background: var(--surface); border-bottom: 1px solid var(--border);
    padding: 0 1rem; align-items: center; justify-content: space-between;
    z-index: 100;
}
.hamburger {
    background: none; border: none; font-size: 1.25rem;
    color: var(--text); cursor: pointer; padding: 0.5rem;
}
.mobile-header-title { font-weight: 700; font-size: 1rem; color: var(--primary); }
.mobile-header-avatar {
    width: 36px; height: 36px; border-radius: 50%;
    background: var(--primary); color: #fff; display: flex;
    align-items: center; justify-content: center; font-weight: 700; font-size: 0.875rem;
}

/* ===== Sidebar ===== */
.sidebar {
    position: fixed; top: 0; left: 0; bottom: 0;
    width: var(--sidebar-width); background: var(--sidebar-bg);
    color: var(--sidebar-text); display: flex; flex-direction: column;
    z-index: 200; transition: transform 0.3s ease; overflow-y: auto;
}
.sidebar-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 1.25rem 1.25rem 0.75rem;
}
.sidebar-logo { font-size: 1.25rem; font-weight: 800; color: #fff; display: flex; align-items: center; gap: 0.5rem; }
.sidebar-close {
    display: none; background: none; border: none; color: var(--sidebar-text);
    font-size: 1.25rem; cursor: pointer;
}
.sidebar-user {
    display: flex; align-items: center; gap: 0.75rem;
    padding: 1rem 1.25rem; margin: 0.5rem 0.75rem;
    background: rgba(255,255,255,0.05); border-radius: var(--radius-sm);
}
.sidebar-avatar {
    width: 40px; height: 40px; border-radius: 50%;
    background: var(--primary); color: #fff; display: flex;
    align-items: center; justify-content: center;
    font-weight: 700; font-size: 1rem; flex-shrink: 0;
}
.sidebar-user-info h4 { font-size: 0.875rem; font-weight: 600; color: #fff; }
.sidebar-nav { flex: 1; padding: 0.5rem 0.75rem; }
.nav-link {
    display: flex; align-items: center; gap: 0.75rem;
    padding: 0.625rem 1rem; border-radius: var(--radius-sm);
    color: var(--sidebar-text); font-size: 0.875rem; font-weight: 500;
    cursor: pointer; transition: var(--transition); margin-bottom: 0.125rem;
}
.nav-link:hover { background: rgba(255,255,255,0.08); color: #fff; }
.nav-link.active { background: var(--sidebar-active); color: #fff; font-weight: 600; }
.nav-link i { width: 20px; text-align: center; font-size: 0.9rem; }
.sidebar-footer { padding: 0.75rem; border-top: 1px solid rgba(255,255,255,0.08); }
.logout-link:hover { background: rgba(239,68,68,0.15); color: #ef4444; }
.sidebar-overlay {
    display: none; position: fixed; inset: 0;
    background: rgba(0,0,0,0.5); z-index: 150;
}
.sidebar-overlay.active { display: block; }

/* ===== Main Content ===== */
.main-content {
    margin-left: var(--sidebar-width); padding: 2rem;
    min-height: 100vh;
}
.section-page { display: none; }
.section-page.active { display: block; }

/* ===== Page Header ===== */
.page-header {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 1.5rem; flex-wrap: wrap; gap: 0.75rem;
}
.page-title { font-size: 1.5rem; font-weight: 800; color: var(--text); }
.page-subtitle { font-size: 0.875rem; color: var(--text-secondary); margin-top: 0.25rem; }

/* ===== Stats Grid ===== */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; margin-bottom: 1.5rem; }
.stat-card {
    display: flex; align-items: center; gap: 1rem;
    padding: 1.25rem; background: var(--surface);
    border-radius: var(--radius); box-shadow: var(--shadow);
    transition: var(--transition);
}
.stat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.stat-icon {
    width: 48px; height: 48px; border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.25rem;
}
.stat-blue .stat-icon { background: var(--primary-bg); color: var(--primary); }
.stat-green .stat-icon { background: var(--secondary-bg); color: var(--secondary); }
.stat-purple .stat-icon { background: var(--purple-bg); color: var(--purple); }
.stat-amber .stat-icon { background: var(--warning-bg); color: var(--warning); }
.stat-info h3 { font-size: 1.75rem; font-weight: 800; line-height: 1.2; }
.stat-info p { font-size: 0.8rem; color: var(--text-secondary); font-weight: 500; }

/* ===== Dashboard Grid ===== */
.dashboard-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-bottom: 1.5rem; }

/* ===== Cards ===== */
.card {
    background: var(--surface); border-radius: var(--radius);
    box-shadow: var(--shadow); overflow: hidden; margin-bottom: 1rem;
}
.card-header {
    padding: 1rem 1.25rem; border-bottom: 1px solid var(--border);
    display: flex; align-items: center; justify-content: space-between;
}
.card-header h3 { font-size: 0.95rem; font-weight: 700; display: flex; align-items: center; gap: 0.5rem; }
.card-body { padding: 1.25rem; }

/* ===== List Items ===== */
.list-item {
    display: flex; align-items: center; gap: 0.75rem;
    padding: 0.75rem; border-radius: var(--radius-sm);
    transition: var(--transition); margin-bottom: 0.5rem;
}
.list-item:hover { background: var(--bg); }
.list-icon {
    width: 40px; height: 40px; border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    font-size: 0.9rem; flex-shrink: 0;
}
.list-icon.bg-blue { background: var(--primary-bg); color: var(--primary); }
.list-icon.bg-green { background: var(--secondary-bg); color: var(--secondary); }
.list-icon.bg-purple { background: var(--purple-bg); color: var(--purple); }
.list-icon.bg-amber { background: var(--warning-bg); color: var(--warning); }
.list-info h4 { font-size: 0.875rem; font-weight: 600; }
.list-info p { font-size: 0.75rem; color: var(--text-secondary); }

/* ===== Tables ===== */
.table-responsive { overflow-x: auto; }
.data-table th {
    text-align: left; padding: 0.75rem 1rem; font-size: 0.75rem;
    font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em;
    color: var(--text-secondary); background: var(--bg);
    border-bottom: 2px solid var(--border); white-space: nowrap;
}
.data-table td {
    padding: 0.75rem 1rem; font-size: 0.875rem;
    border-bottom: 1px solid var(--border); vertical-align: middle;
}
.data-table tbody tr:hover { background: rgba(99,102,241,0.03); }
.td-actions { white-space: nowrap; }

/* ===== Empty State ===== */
.empty-state {
    text-align: center; padding: 2rem 1rem; color: var(--text-secondary);
}
.empty-state i { font-size: 2.5rem; margin-bottom: 0.75rem; opacity: 0.4; display: block; }
.empty-state p { font-size: 0.875rem; }

/* ===== Modal ===== */
.modal-overlay {
    display: none; position: fixed; inset: 0;
    background: rgba(0,0,0,0.5); z-index: 1000;
    justify-content: center; align-items: center;
    padding: 1rem; backdrop-filter: blur(4px);
}
.modal-overlay.active { display: flex; }
.modal {
    background: var(--surface); border-radius: var(--radius);
    width: 100%; max-width: 560px; max-height: 90vh;
    overflow-y: auto; box-shadow: 0 25px 50px rgba(0,0,0,0.25);
}
.modal-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 1.25rem 1.5rem; border-bottom: 1px solid var(--border);
}
.modal-header h3 { font-size: 1.125rem; font-weight: 700; }
.modal-close {
    background: none; border: none; font-size: 1.25rem;
    color: var(--text-secondary); cursor: pointer; padding: 0.25rem;
}
.modal-close:hover { color: var(--danger); }
.modal-body { padding: 1.5rem; }

/* Confirm Dialog */
.confirm-overlay { z-index: 1100; }
.confirm-modal {
    max-width: 400px; text-align: center; padding: 2rem;
}
.confirm-icon {
    width: 64px; height: 64px; border-radius: 50%;
    background: var(--warning-bg); color: var(--warning);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.75rem; margin: 0 auto 1rem;
}
.confirm-modal h3 { margin-bottom: 0.5rem; }
.confirm-modal p { color: var(--text-secondary); margin-bottom: 1.5rem; font-size: 0.875rem; }
.confirm-actions { display: flex; gap: 0.75rem; justify-content: center; }

/* ===== Kuis Overlay ===== */
.kuis-overlay {
    display: none; position: fixed; inset: 0;
    background: var(--bg); z-index: 1050;
    flex-direction: column;
}
.kuis-overlay.active { display: flex; }
.kuis-container { display: flex; flex-direction: column; height: 100%; }
.kuis-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 1rem 1.5rem; background: var(--surface);
    border-bottom: 1px solid var(--border);
}
.kuis-header h3 { font-size: 1rem; font-weight: 700; }
.kuis-timer {
    display: flex; align-items: center; gap: 0.5rem;
    font-weight: 700; color: var(--primary); font-size: 1.125rem;
}
.kuis-body { flex: 1; overflow-y: auto; padding: 1.5rem; }
.kuis-footer {
    padding: 1rem 1.5rem; background: var(--surface);
    border-top: 1px solid var(--border); text-align: right;
}

/* Kuis Soal */
.kuis-soal {
    padding: 1rem; margin-bottom: 1rem;
    border: 1px solid var(--border); border-radius: var(--radius-sm);
    background: var(--surface);
}
.kuis-soal h4 { font-size: 0.875rem; font-weight: 700; color: var(--primary); margin-bottom: 0.75rem; }
.kuis-pilihan { display: flex; flex-direction: column; gap: 0.5rem; }
.kuis-pilihan label {
    display: flex; align-items: center; gap: 0.5rem;
    padding: 0.625rem 0.75rem; border: 1px solid var(--border);
    border-radius: var(--radius-sm); cursor: pointer;
    transition: var(--transition); font-size: 0.875rem;
}
.kuis-pilihan label:hover { border-color: var(--primary); background: var(--primary-bg); }
.kuis-pilihan label input[type="radio"] { accent-color: var(--primary); }
.kuis-pilihan label input[type="text"] {
    flex: 1; border: none; background: transparent;
    font-size: 0.875rem; padding: 0.25rem; outline: none;
}

/* ===== Join Form ===== */
.join-form { display: flex; gap: 0.75rem; align-items: center; }
.join-form .form-input { flex: 1; padding-left: 0.875rem; }

/* ===== Profil ===== */
.profil-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.profil-item { padding: 1rem; background: var(--bg); border-radius: var(--radius-sm); }
.profil-item label { font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-secondary); display: block; margin-bottom: 0.375rem; }
.profil-item p { font-size: 0.9375rem; font-weight: 600; color: var(--text); }

/* ===== Chart Container ===== */
.chart-container { height: 250px; position: relative; }
.chart-empty {
    display: flex; flex-direction: column; align-items: center;
    justify-content: center; height: 100%; color: var(--text-secondary);
}
.chart-empty i { font-size: 3rem; margin-bottom: 1rem; opacity: 0.3; }
.chart-empty p { font-size: 0.875rem; text-align: center; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .dashboard-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .mobile-header { display: flex; }
    .sidebar {
        transform: translateX(-100%);
    }
    .sidebar.active { transform: translateX(0); }
    .sidebar-close { display: block; }
    .main-content {
        margin-left: 0; padding: 1rem;
        padding-top: calc(56px + 1rem);
    }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 0.75rem; }
    .stat-card { padding: 1rem; }
    .stat-info h3 { font-size: 1.25rem; }
    .page-title { font-size: 1.25rem; }
    .page-header { flex-direction: column; align-items: flex-start; }
    .join-form { flex-direction: column; }
    .join-form .form-input { width: 100%; }
    .profil-grid { grid-template-columns: 1fr; }
    .form-row-modal { grid-template-columns: 1fr; }
    .modal { max-width: 100%; margin: 0.5rem; }
    .data-table { font-size: 0.8125rem; }
    .data-table th, .data-table td { padding: 0.5rem 0.625rem; }
}

@media (max-width: 480px) {
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .login-card { padding: 1.5rem; }
    .role-selection { grid-template-columns: 1fr; }
}
/* ===== Enhanced Workspace ===== */
.app-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding: 1.15rem 1.3rem;
    background: linear-gradient(135deg, rgba(99,102,241,0.12), rgba(139,92,246,0.07));
    border: 1px solid rgba(99,102,241,0.16);
    border-radius: 16px;
    position: relative;
    overflow: hidden;
}
.app-toolbar::after {
    content: "";
    position: absolute;
    width: 180px;
    height: 180px;
    right: -70px;
    top: -90px;
    border-radius: 50%;
    background: rgba(99,102,241,0.08);
}
.app-toolbar h1 { font-size: 1.2rem; line-height: 1.25; position: relative; z-index: 1; }
.toolbar-kicker { color: var(--primary); font-size: 0.7rem; font-weight: 800; text-transform: uppercase; letter-spacing: 0.12em; }
.toolbar-date { color: var(--text-secondary); font-size: 0.8rem; margin-top: 0.2rem; }
.toolbar-actions { display: flex; align-items: center; gap: 0.6rem; position: relative; z-index: 2; }
.icon-button {
    width: 44px; height: 44px; border-radius: 12px;
    border: 1px solid rgba(99,102,241,0.18); background: rgba(255,255,255,0.9);
    color: var(--primary); cursor: pointer; position: relative;
    display: grid; place-items: center; font-size: 1rem; transition: var(--transition);
}
.icon-button:hover { transform: translateY(-2px); box-shadow: var(--shadow); background: #fff; }
.notification-badge {
    min-width: 18px; height: 18px; padding: 0 4px; border-radius: 20px;
    position: absolute; top: -5px; right: -5px; display: grid; place-items: center;
    background: var(--danger); color: #fff; border: 2px solid var(--surface);
    font-size: 0.62rem; font-weight: 800;
}
.notification-badge:empty, .notification-badge[data-count="0"] { display: none; }

.section-page.active { animation: sectionRise 0.28s ease both; }
@keyframes sectionRise {
    from { opacity: 0; transform: translateY(7px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== Quick Actions ===== */
.quick-actions {
    display: grid; grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.8rem; margin-bottom: 1.5rem;
}
.quick-action {
    min-height: 84px; padding: 0.9rem; border: 1px solid var(--border);
    background: var(--surface); border-radius: var(--radius); cursor: pointer;
    display: flex; flex-direction: column; align-items: flex-start; justify-content: center;
    gap: 0.55rem; color: var(--text); transition: var(--transition); box-shadow: var(--shadow);
}
.quick-action i {
    width: 36px; height: 36px; border-radius: 10px; display: grid; place-items: center;
    background: var(--primary-bg); color: var(--primary);
}
.quick-action span { font-size: 0.82rem; font-weight: 700; }
.quick-action:hover { border-color: rgba(99,102,241,0.35); transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.quick-action:nth-child(2) i { background: var(--secondary-bg); color: var(--secondary); }
.quick-action:nth-child(3) i { background: var(--purple-bg); color: var(--purple); }
.quick-action:nth-child(4) i { background: var(--warning-bg); color: var(--warning); }

/* ===== Student Progress ===== */
.student-progress-card {
    display: flex; align-items: center; justify-content: space-between; gap: 1rem;
    padding: 1.35rem 1.5rem; margin-bottom: 1rem; border-radius: 16px;
    background: linear-gradient(135deg, #2f36c7, #7058dc); color: #fff;
    box-shadow: 0 14px 32px rgba(99,102,241,0.2); overflow: hidden; position: relative;
}
.student-progress-card::before {
    content: ""; position: absolute; width: 190px; height: 190px; right: -80px; bottom: -110px;
    border-radius: 50%; background: rgba(255,255,255,0.08);
}
.progress-copy { position: relative; z-index: 1; }
.progress-eyebrow { display: block; font-size: 0.7rem; font-weight: 800; text-transform: uppercase; letter-spacing: 0.12em; opacity: 0.82; }
.progress-copy h3 { font-size: 1.1rem; margin: 0.25rem 0; }
.progress-copy p { font-size: 0.8rem; opacity: 0.82; }
.progress-ring {
    --progress: 0deg;
    width: 82px; height: 82px; border-radius: 50%; flex: 0 0 auto; position: relative; z-index: 1;
    display: grid; place-items: center;
    background: conic-gradient(#fff var(--progress), rgba(255,255,255,0.22) 0);
}
.progress-ring::after { content: ""; position: absolute; inset: 8px; border-radius: 50%; background: #5650d8; }
.progress-ring span { position: relative; z-index: 2; color: #fff; font-size: 0.95rem; font-weight: 800; }

/* ===== Search and Filters ===== */
.section-tools { display: flex; align-items: center; justify-content: space-between; gap: 0.75rem; margin-bottom: 1rem; }
.search-box { position: relative; width: min(100%, 380px); }
.search-box i { position: absolute; left: 0.85rem; top: 50%; transform: translateY(-50%); color: var(--text-secondary); }
.search-box input {
    width: 100%; padding: 0.68rem 0.9rem 0.68rem 2.35rem;
    border: 1px solid var(--border); border-radius: 10px; background: var(--bg);
    color: var(--text); font-size: 0.82rem; transition: var(--transition);
}
.search-box input:focus { outline: none; border-color: var(--primary); background: #fff; box-shadow: 0 0 0 3px var(--primary-bg); }
.agenda-filter { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 1rem; }
.chip {
    border: 1px solid var(--border); background: var(--surface); color: var(--text-secondary);
    border-radius: 999px; padding: 0.48rem 0.9rem; font-size: 0.78rem; font-weight: 700;
    cursor: pointer; transition: var(--transition);
}
.chip:hover, .chip.active { border-color: var(--primary); background: var(--primary-bg); color: var(--primary); }

/* ===== Announcements ===== */
.announcement-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.announcement-card {
    background: var(--surface); border: 1px solid var(--border); border-radius: 14px;
    padding: 1.15rem; box-shadow: var(--shadow); transition: var(--transition); position: relative; overflow: hidden;
}
.announcement-card::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px; background: var(--primary); }
.announcement-card.priority-high::before { background: var(--danger); }
.announcement-card.priority-medium::before { background: var(--warning); }
.announcement-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.announcement-meta { display: flex; align-items: center; justify-content: space-between; gap: 0.75rem; margin-bottom: 0.7rem; }
.announcement-card h3 { font-size: 0.98rem; margin-bottom: 0.45rem; }
.announcement-card p { color: var(--text-secondary); font-size: 0.84rem; white-space: pre-wrap; }
.announcement-footer { display: flex; align-items: center; justify-content: space-between; gap: 0.5rem; margin-top: 1rem; padding-top: 0.75rem; border-top: 1px dashed var(--border); }
.announcement-footer small { color: var(--text-secondary); }
.mini-actions { display: flex; gap: 0.35rem; }
.mini-icon-btn { width: 30px; height: 30px; border: 1px solid var(--border); border-radius: 8px; background: #fff; cursor: pointer; color: var(--text-secondary); }
.mini-icon-btn:hover { color: var(--primary); border-color: var(--primary); }

/* ===== Agenda Timeline ===== */
.agenda-list { position: relative; display: grid; gap: 0.75rem; }
.agenda-item {
    display: grid; grid-template-columns: 72px 1fr auto; gap: 1rem; align-items: center;
    padding: 1rem; background: var(--surface); border: 1px solid var(--border);
    border-radius: 14px; box-shadow: var(--shadow); transition: var(--transition);
}
.agenda-item:hover { transform: translateX(3px); border-color: rgba(99,102,241,0.32); }
.agenda-date {
    border-radius: 12px; background: var(--primary-bg); color: var(--primary);
    text-align: center; padding: 0.55rem 0.35rem; line-height: 1;
}
.agenda-date strong { display: block; font-size: 1.3rem; }
.agenda-date span { display: block; margin-top: 0.25rem; font-size: 0.67rem; font-weight: 800; text-transform: uppercase; }
.agenda-info h3 { font-size: 0.9rem; margin-bottom: 0.25rem; }
.agenda-info p { color: var(--text-secondary); font-size: 0.78rem; }
.agenda-item.urgent { border-color: rgba(239,68,68,0.28); }
.agenda-item.urgent .agenda-date { background: var(--danger-bg); color: var(--danger); animation: softPulse 1.8s infinite; }
@keyframes softPulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.035); } }
.deadline-label { font-size: 0.72rem; font-weight: 800; color: var(--text-secondary); white-space: nowrap; }

/* ===== Discussions ===== */
.discussion-layout { display: grid; grid-template-columns: minmax(260px, 360px) minmax(0, 1fr); gap: 1rem; align-items: start; }
.discussion-composer { position: sticky; top: 1rem; }
.discussion-feed { display: grid; gap: 0.75rem; }
.discussion-post {
    background: var(--surface); border: 1px solid var(--border); border-radius: 14px;
    padding: 1rem; box-shadow: var(--shadow);
}
.discussion-author { display: flex; align-items: center; justify-content: space-between; gap: 0.75rem; margin-bottom: 0.75rem; }
.author-main { display: flex; align-items: center; gap: 0.65rem; }
.author-avatar {
    width: 38px; height: 38px; border-radius: 50%; display: grid; place-items: center;
    color: #fff; background: linear-gradient(135deg, var(--primary), var(--purple)); font-size: 0.8rem; font-weight: 800;
}
.author-main h4 { font-size: 0.84rem; }
.author-main p { font-size: 0.7rem; color: var(--text-secondary); }
.discussion-content { color: var(--text); font-size: 0.86rem; white-space: pre-wrap; }

/* ===== Notifications ===== */
.notification-list { display: grid; gap: 0.6rem; }
.notification-item {
    display: grid; grid-template-columns: 38px 1fr; gap: 0.7rem; padding: 0.75rem;
    background: var(--bg); border: 1px solid var(--border); border-radius: 11px;
}
.notification-item i { width: 38px; height: 38px; border-radius: 10px; display: grid; place-items: center; background: var(--primary-bg); color: var(--primary); }
.notification-item h4 { font-size: 0.82rem; }
.notification-item p { font-size: 0.74rem; color: var(--text-secondary); margin-top: 0.15rem; }

/* ===== Toast ===== */
.toast-container { position: fixed; right: 1rem; bottom: 1rem; z-index: 2500; display: grid; gap: 0.6rem; width: min(360px, calc(100vw - 2rem)); }
.toast {
    display: grid; grid-template-columns: 34px 1fr auto; align-items: center; gap: 0.7rem;
    padding: 0.85rem 1rem; background: #172033; color: #fff; border-radius: 12px;
    box-shadow: 0 16px 40px rgba(15,23,42,0.26); animation: toastIn 0.25s ease both;
}
.toast.success .toast-icon { background: rgba(16,185,129,0.18); color: #6ee7b7; }
.toast.error .toast-icon { background: rgba(239,68,68,0.18); color: #fca5a5; }
.toast.info .toast-icon { background: rgba(99,102,241,0.2); color: #c7d2fe; }
.toast-icon { width: 34px; height: 34px; border-radius: 9px; display: grid; place-items: center; }
.toast p { font-size: 0.8rem; }
.toast button { background: none; border: none; color: rgba(255,255,255,0.65); cursor: pointer; }
@keyframes toastIn { from { opacity: 0; transform: translateY(12px) scale(0.98); } to { opacity: 1; transform: none; } }

/* ===== Material Progress ===== */
.material-progress { min-width: 115px; }
.progress-track { height: 7px; border-radius: 99px; background: #e8edf5; overflow: hidden; margin-top: 0.35rem; }
.progress-fill { height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--primary), var(--purple)); transition: width 0.35s ease; }
.completion-button.completed { background: var(--secondary-bg); color: var(--secondary); border-color: rgba(16,185,129,0.25); }

@media (max-width: 1024px) {
    .quick-actions { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .announcement-grid { grid-template-columns: 1fr; }
    .discussion-layout { grid-template-columns: 1fr; }
    .discussion-composer { position: static; }
}

@media (max-width: 768px) {
    .app-toolbar { margin-top: 0; padding: 1rem; }
    .app-toolbar h1 { font-size: 1rem; }
    .quick-actions { gap: 0.65rem; }
    .quick-action { min-height: 76px; }
    .student-progress-card { align-items: flex-start; }
    .progress-ring { width: 70px; height: 70px; }
    .agenda-item { grid-template-columns: 62px 1fr; }
    .deadline-label { grid-column: 2; }
}

@media (max-width: 480px) {
    .quick-actions { grid-template-columns: 1fr 1fr; }
    .quick-action { align-items: center; text-align: center; }
    .student-progress-card { padding: 1rem; }
    .progress-copy h3 { font-size: 0.95rem; }
    .progress-copy p { font-size: 0.74rem; }
    .section-tools, .search-box { width: 100%; }
}

/* ===== Rich Text Assignment Submission ===== */
.modal.modal-wide { max-width: 1040px; }
.submission-assignment-summary {
    display: flex; align-items: flex-start; gap: 0.8rem; padding: 0.85rem 1rem;
    margin-bottom: 1rem; border: 1px solid var(--border); border-radius: 12px;
    background: linear-gradient(135deg, var(--primary-bg), #fff);
}
.submission-assignment-summary h4 { font-size: 0.95rem; margin-bottom: 0.2rem; }
.submission-assignment-summary p { font-size: 0.76rem; color: var(--text-secondary); }
.editor-note {
    display: flex; align-items: center; gap: 0.55rem; margin-bottom: 0.75rem;
    padding: 0.7rem 0.85rem; border-radius: 10px; background: var(--warning-bg);
    color: #92400e; font-size: 0.78rem; font-weight: 650;
}
.rich-editor-shell {
    overflow: hidden; border: 1px solid #cfd6e4; border-radius: 13px;
    background: #e9edf3; box-shadow: inset 0 1px 0 rgba(255,255,255,0.72);
}
.rich-editor-toolbar {
    position: sticky; top: 0; z-index: 4; display: flex; align-items: center; gap: 0.28rem;
    flex-wrap: wrap; padding: 0.58rem; border-bottom: 1px solid #d7deea; background: #f8fafc;
}
.editor-tool, .editor-color-tool {
    min-width: 34px; height: 34px; display: inline-flex; align-items: center; justify-content: center;
    gap: 0.35rem; border: 1px solid transparent; border-radius: 7px; background: transparent;
    color: #374151; cursor: pointer; transition: var(--transition); font-size: 0.8rem;
}
.editor-tool:hover, .editor-color-tool:hover { background: #fff; border-color: #cbd5e1; color: var(--primary); }
.editor-tool:active { transform: translateY(1px); }
.editor-image-tool { padding: 0 0.65rem; }
.editor-color-tool { position: relative; overflow: hidden; }
.editor-color-tool input { position: absolute; inset: 0; opacity: 0; cursor: pointer; }
.editor-select {
    height: 34px; border: 1px solid #cbd5e1; border-radius: 7px; background: #fff;
    color: #374151; padding: 0 0.55rem; font-size: 0.76rem; outline: none;
}
.editor-divider { width: 1px; height: 23px; background: #d8dee8; margin: 0 0.15rem; }
.rich-editor-document {
    width: min(760px, calc(100% - 2rem)); min-height: 430px; margin: 1rem auto;
    padding: 2.2rem 2.5rem; background: #fff; color: #172033; border: 1px solid #d8dee8;
    border-radius: 3px; box-shadow: 0 8px 24px rgba(15,23,42,0.13);
    font-family: Arial, Helvetica, sans-serif; font-size: 15px; line-height: 1.65;
    outline: none; overflow-wrap: anywhere;
}
.rich-editor-document:focus { border-color: var(--primary); box-shadow: 0 8px 24px rgba(15,23,42,0.13), 0 0 0 3px rgba(99,102,241,0.12); }
.rich-editor-document:empty::before { content: attr(data-placeholder); color: #9aa4b2; pointer-events: none; }
.rich-editor-document h1, .submission-document h1 { font-size: 1.75rem; line-height: 1.25; margin: 0.7rem 0; }
.rich-editor-document h2, .submission-document h2 { font-size: 1.4rem; line-height: 1.3; margin: 0.65rem 0; }
.rich-editor-document h3, .submission-document h3 { font-size: 1.15rem; line-height: 1.35; margin: 0.6rem 0; }
.rich-editor-document p, .submission-document p { margin: 0.55rem 0; }
.rich-editor-document ul, .rich-editor-document ol,
.submission-document ul, .submission-document ol { padding-left: 1.7rem; margin: 0.55rem 0; }
.rich-editor-document blockquote, .submission-document blockquote {
    margin: 0.75rem 0; padding: 0.7rem 1rem; border-left: 4px solid var(--primary);
    background: var(--primary-bg); color: #344054;
}
.rich-editor-document a, .submission-document a { color: var(--primary); text-decoration: underline; }
.rich-editor-document img, .submission-document img {
    display: block; max-width: 100%; height: auto; margin: 0.8rem auto;
    border-radius: 9px; border: 1px solid #d8dee8; box-shadow: 0 5px 16px rgba(15,23,42,0.08);
}
.rich-editor-footer {
    display: flex; justify-content: space-between; gap: 1rem; padding: 0.6rem 0.8rem;
    border-top: 1px solid #d7deea; background: #f8fafc; color: var(--text-secondary); font-size: 0.72rem;
}
.submission-form-actions { display: flex; justify-content: flex-end; gap: 0.6rem; margin-top: 1rem; flex-wrap: wrap; }
.submission-detail-meta {
    display: flex; align-items: center; justify-content: space-between; gap: 1rem;
    margin-bottom: 1rem; padding-bottom: 0.8rem; border-bottom: 1px solid var(--border);
}
.submission-detail-meta h4 { margin-top: 0.35rem; font-size: 1rem; }
.submission-time { color: var(--text-secondary); font-size: 0.76rem; white-space: nowrap; }
.submission-document {
    min-height: 300px; padding: 2rem 2.3rem; background: #fff; border: 1px solid #d8dee8;
    border-radius: 5px; box-shadow: 0 6px 20px rgba(15,23,42,0.08); color: #172033;
    font-family: Arial, Helvetica, sans-serif; font-size: 15px; line-height: 1.65; overflow-wrap: anywhere;
}
.submission-empty-copy { color: var(--text-secondary); font-style: italic; }
.submission-grade-box {
    display: grid; grid-template-columns: minmax(160px, 0.35fr) minmax(0, 1fr); gap: 1rem;
    margin-top: 1rem; padding: 1rem; border: 1px solid rgba(16,185,129,0.25);
    border-radius: 12px; background: var(--secondary-bg);
}
.submission-grade-box span { display: block; margin-bottom: 0.3rem; color: #047857; font-size: 0.72rem; font-weight: 800; text-transform: uppercase; }
.submission-grade-box strong { color: #047857; font-size: 1.45rem; }
.submission-grade-box p { color: #065f46; font-size: 0.84rem; white-space: pre-wrap; }

@media (max-width: 768px) {
    .modal.modal-wide { max-width: 100%; }
    .rich-editor-toolbar { flex-wrap: nowrap; overflow-x: auto; }
    .editor-divider { flex: 0 0 1px; }
    .editor-tool, .editor-color-tool, .editor-select { flex: 0 0 auto; }
    .rich-editor-document { width: calc(100% - 1rem); min-height: 360px; margin: 0.5rem auto; padding: 1.25rem; }
    .rich-editor-footer { flex-direction: column; gap: 0.25rem; }
    .submission-detail-meta { align-items: flex-start; flex-direction: column; }
    .submission-grade-box { grid-template-columns: 1fr; }
    .submission-document { padding: 1.2rem; }
}

/* Integrasi database sekolah */
.form-hint {
    display: block;
    margin-top: 0.35rem;
    color: var(--text-secondary);
    font-size: 0.78rem;
    line-height: 1.45;
}

.alert-warning {
    padding: 0.8rem 1rem;
    border: 1px solid #fcd34d;
    border-radius: 10px;
    background: #fffbeb;
    color: #92400e;
    font-size: 0.88rem;
    line-height: 1.5;
}