@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    /* Academic Blue Theme */
    --primary: #1e40af;
    --primary-light: #3b82f6;
    --secondary: #475569;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --bg-color: #f1f5f9;
    --surface: #ffffff;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --glass-bg: rgba(255, 255, 255, 0.85);
    --glass-border: rgba(255, 255, 255, 0.3);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --radius: 12px;
}

body.dark-mode {
    --primary: #60a5fa;
    --primary-light: #93c5fd;
    --bg-color: #0f172a;
    --surface: #1e293b;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border: #334155;
    --glass-bg: rgba(30, 41, 59, 0.85);
    --glass-border: rgba(255, 255, 255, 0.05);
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Inter', sans-serif; }
body { background-color: var(--bg-color); color: var(--text-main); transition: background-color 0.3s ease; }

/* Utilities */
.mt-2 { margin-top: 1.5rem; }
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1.5rem;
}

/* Layout */
.app-container { display: flex; min-height: 100vh; }
.sidebar { width: 260px; height: 100vh; position: sticky; top: 0; display: flex; flex-direction: column; z-index: 100; border-right: 1px solid var(--border); border-radius: 0; }
.sidebar-header { padding: 2rem 1.5rem; display: flex; align-items: center; gap: 1rem; border-bottom: 1px solid var(--border); }
.logo { font-size: 2rem; }
.nav-links { list-style: none; margin-top: 1rem; flex: 1; }
.nav-links li { padding: 1rem 1.5rem; cursor: pointer; display: flex; align-items: center; gap: 1rem; color: var(--text-muted); font-weight: 500; transition: 0.2s; }
.nav-links li:hover, .nav-links li.active { color: var(--primary); background: rgba(59, 130, 246, 0.1); border-right: 4px solid var(--primary); }
.main-content { flex: 1; display: flex; flex-direction: column; overflow-x: hidden; }

/* Topbar */
.topbar { display: flex; justify-content: space-between; align-items: center; padding: 1rem 2rem; margin: 1rem; border-radius: var(--radius); z-index: 90; }
.topbar-left, .topbar-right { display: flex; align-items: center; gap: 1rem; }
.btn-icon { background: transparent; border: none; font-size: 1.2rem; cursor: pointer; color: var(--text-main); padding: 0.5rem; border-radius: 50%; transition: background 0.2s; }
.btn-icon:hover { background: var(--border); }
.user-profile { display: flex; align-items: center; gap: 0.5rem; font-weight: 500; }
.avatar { background: var(--primary); color: white; width: 35px; height: 35px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; }

/* Views & Routing */
.views-container { padding: 0 1rem 1rem 1rem; flex: 1; }
.view { display: none; animation: fadeIn 0.4s ease forwards; }
.view.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* Dashboard Dashboard */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1.5rem; }
.stat-card { display: flex; align-items: center; gap: 1.5rem; }
.stat-icon { width: 60px; height: 60px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.8rem; }
.stat-info h4 { color: var(--text-muted); font-weight: 500; font-size: 0.9rem; }
.stat-info h2 { font-size: 1.8rem; color: var(--text-main); }

/* Forms & Inputs */
.input-form { width: 100%; padding: 0.75rem 1rem; border: 1px solid var(--border); border-radius: 8px; background: var(--surface); color: var(--text-main); font-size: 0.95rem; transition: border-color 0.2s; }
.input-form:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2); }
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; margin-bottom: 0.5rem; font-weight: 500; font-size: 0.9rem; color: var(--text-main); }
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1.5rem; }
.opsi-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.opsi-item { display: flex; align-items: center; gap: 0.5rem; }

/* Buttons */
.btn { padding: 0.75rem 1.5rem; border-radius: 8px; border: none; font-weight: 600; cursor: pointer; transition: 0.2s; font-size: 0.95rem; }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-light); transform: translateY(-2px); box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4); }
.btn-secondary { background: var(--surface); color: var(--text-main); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--bg-color); }
.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { filter: brightness(1.1); }

/* Table */
.table-container { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; text-align: left; }
th, td { padding: 1rem; border-bottom: 1px solid var(--border); }
th { background: rgba(0,0,0,0.02); font-weight: 600; color: var(--text-muted); }
.dark-mode th { background: rgba(255,255,255,0.02); }

/* CBT Mode */
.cbt-header { display: flex; justify-content: space-between; align-items: center; font-size: 1.2rem; }
.timer { font-family: monospace; font-size: 1.5rem; font-weight: bold; color: var(--danger); }
.cbt-layout { display: grid; grid-template-columns: 3fr 1fr; gap: 1.5rem; }
.cbt-opsi-list { display: flex; flex-direction: column; gap: 1rem; }
.cbt-opsi-btn { text-align: left; background: var(--surface); border: 1px solid var(--border); padding: 1rem; border-radius: 8px; cursor: pointer; transition: 0.2s; }
.cbt-opsi-btn:hover { border-color: var(--primary); }
.cbt-opsi-btn.selected { background: var(--primary); color: white; border-color: var(--primary); }
.nav-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0.5rem; }
.nav-btn { aspect-ratio: 1; border: 1px solid var(--border); border-radius: 4px; background: var(--surface); color: var(--text-main); cursor: pointer; }
.nav-btn.answered { background: var(--success); color: white; border-color: var(--success); }
.nav-btn.active { border: 2px solid var(--primary); font-weight: bold; }

/* Toasts */
#toast-container { position: fixed; bottom: 20px; right: 20px; z-index: 9999; display: flex; flex-direction: column; gap: 10px; }
.toast { background: var(--text-main); color: var(--bg-color); padding: 1rem 1.5rem; border-radius: 8px; box-shadow: var(--shadow); animation: slideIn 0.3s ease forwards; }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* Mobile */
.mobile-only { display: none; }
@media (max-width: 768px) {
    .sidebar { position: fixed; transform: translateX(-100%); transition: 0.3s; }
    .sidebar.open { transform: translateX(0); }
    .mobile-only { display: block; }
    .cbt-layout { grid-template-columns: 1fr; }
    .opsi-grid { grid-template-columns: 1fr; }
}

/* Print Rules */
@media print {
    body * { visibility: hidden; }
    #print-area, #print-area * { visibility: visible; }
    #print-area { position: absolute; left: 0; top: 0; width: 100%; padding: 0 !important; }
    .no-print { display: none !important; }
    .app-container, .glass-panel { background: white !important; border: none; box-shadow: none; }
}