.hidden { display: none !important; }
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --primary: #1565C0;
    --primary-dark: #0D47A1;
    --primary-light: #42A5F5;
    --success: #4CAF50;
    --warning: #FF9800;
    --danger: #F44336;
    --info: #2196F3;
    --bg: #f5f7fa;
    --surface: #ffffff;
    --sidebar-bg: #1a1a2e;
    --sidebar-text: #a0aec0;
    --sidebar-active: #1565C0;
    --text: #1a202c;
    --text-secondary: #718096;
    --border: #e2e8f0;
    --shadow: 0 1px 3px rgba(0,0,0,0.08);
    --radius: 8px;
}
[data-theme="dark"] {
    --bg: #0f0f1a;
    --surface: #1a1a2e;
    --text: #e2e8f0;
    --text-secondary: #a0aec0;
    --border: #2d3748;
    --shadow: 0 1px 3px rgba(0,0,0,0.3);
}
body { font-family: 'Inter', sans-serif; background: var(--bg); color: var(--text); }
#app { display: flex; min-height: 100vh; }
a { color: var(--primary); text-decoration: none; }

/* ===== SIDEBAR ===== */
.sidebar {
    width: 240px; background: var(--sidebar-bg); color: var(--sidebar-text);
    display: flex; flex-direction: column; position: fixed; top: 0; left: 0; height: 100vh;
    z-index: 100; transition: width 0.3s;
}
.sidebar.collapsed { width: 64px; }
.sidebar.collapsed .logo span, .sidebar.collapsed .nav-item span, .sidebar.collapsed .sidebar-footer .user-info, .sidebar.collapsed .sidebar-footer .logout-btn { display: none; }
.sidebar-header {
    padding: 16px; display: flex; align-items: center; justify-content: space-between;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.logo { display: flex; align-items: center; gap: 8px; font-size: 18px; font-weight: 700; color: #fff; }
.logo i { font-size: 22px; color: var(--primary-light); }
.sidebar-toggle { background: none; border: none; color: var(--sidebar-text); cursor: pointer; font-size: 18px; padding: 4px; }
.sidebar-nav { flex: 1; padding: 8px; overflow-y: auto; }
.nav-item {
    display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-radius: 6px;
    color: var(--sidebar-text); font-size: 13px; transition: all 0.2s; margin-bottom: 2px;
}
.nav-item:hover { background: rgba(255,255,255,0.06); color: #fff; }
.nav-item.active { background: var(--sidebar-active); color: #fff; }
.nav-item i { width: 20px; text-align: center; font-size: 15px; }
.sidebar-footer {
    padding: 12px; border-top: 1px solid rgba(255,255,255,0.08);
    display: flex; align-items: center; justify-content: space-between;
}
.user-info { display: flex; align-items: center; gap: 8px; }
.avatar { width: 32px; height: 32px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 14px; font-weight: 600; }
.user-name { font-size: 12px; font-weight: 600; color: #fff; }
.user-role { font-size: 10px; color: var(--sidebar-text); }
.logout-btn { background: none; border: none; color: var(--sidebar-text); cursor: pointer; padding: 6px; border-radius: 4px; font-size: 16px; }
.logout-btn:hover { background: rgba(255,255,255,0.1); color: var(--danger); }

/* ===== MAIN ===== */
#main { flex: 1; margin-left: 240px; display: flex; flex-direction: column; }
.sidebar.collapsed + #main { margin-left: 64px; }
.topbar {
    display: flex; align-items: center; justify-content: space-between;
    padding: 16px 24px; background: var(--surface); border-bottom: 1px solid var(--border);
    position: sticky; top: 0; z-index: 50;
}
.topbar h1 { font-size: 20px; font-weight: 600; }
.topbar-actions { display: flex; align-items: center; gap: 12px; }
.search-box {
    display: flex; align-items: center; gap: 8px; background: var(--bg);
    padding: 6px 12px; border-radius: 6px; border: 1px solid var(--border);
}
.search-box input { background: none; border: none; outline: none; font-size: 13px; width: 200px; color: var(--text); }
.search-box i { color: var(--text-secondary); font-size: 14px; }
.btn-icon { background: none; border: none; color: var(--text-secondary); cursor: pointer; padding: 6px; border-radius: 4px; font-size: 16px; }
.btn-icon:hover { background: var(--bg); color: var(--text); }

/* ===== CONTENT ===== */
.content { padding: 24px; flex: 1; }

/* ===== CARDS ===== */
.card { background: var(--surface); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); margin-bottom: 20px; }
.card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; }
.card-header h2 { font-size: 16px; font-weight: 600; }

/* ===== STATS ===== */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card {
    display: flex; align-items: center; gap: 16px;
    background: var(--surface); padding: 20px; border-radius: var(--radius); box-shadow: var(--shadow);
}
.stat-icon { width: 48px; height: 48px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 20px; }
.stat-info h3 { font-size: 24px; font-weight: 700; }
.stat-info p { font-size: 12px; color: var(--text-secondary); margin-top: 2px; }

/* ===== GRID ===== */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }

/* ===== FORMS ===== */
.form-group { margin-bottom: 12px; }
.form-group label { display: block; font-size: 12px; font-weight: 500; margin-bottom: 4px; color: var(--text-secondary); }
.form-control {
    width: 100%; padding: 8px 12px; border: 1px solid var(--border); border-radius: 6px;
    background: var(--bg); color: var(--text); font-size: 13px; font-family: inherit; outline: none;
}
.form-control:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(21,101,192,0.15); }
textarea.form-control { resize: vertical; }
select.form-control { cursor: pointer; }

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px;
    border: none; border-radius: 6px; font-size: 13px; font-weight: 500; cursor: pointer;
    transition: all 0.2s; font-family: inherit;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-success { background: var(--success); color: #fff; }
.btn-warning { background: var(--warning); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-ghost { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-ghost:hover { background: var(--bg); }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-icon-sm { background: none; border: none; cursor: pointer; color: var(--text-secondary); padding: 4px 6px; border-radius: 4px; font-size: 14px; }
.btn-icon-sm:hover { background: var(--bg); color: var(--primary); }

/* ===== TABLE ===== */
.table-container { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th { text-align: left; padding: 10px 12px; border-bottom: 2px solid var(--border); color: var(--text-secondary); font-weight: 600; text-transform: uppercase; font-size: 11px; letter-spacing: 0.5px; }
td { padding: 10px 12px; border-bottom: 1px solid var(--border); }
tr:hover td { background: rgba(21,101,192,0.02); }

/* ===== BADGES ===== */
.badge { display: inline-block; padding: 2px 8px; border-radius: 10px; font-size: 11px; font-weight: 500; }
.badge-success { background: rgba(76,175,80,0.12); color: var(--success); }
.badge-warning { background: rgba(255,152,0,0.12); color: var(--warning); }
.badge-danger { background: rgba(244,67,54,0.12); color: var(--danger); }
.badge-info { background: rgba(33,150,243,0.12); color: var(--info); }

/* ===== AI ===== */
.ai-result { background: #1a1a2e; color: #e2e8f0; padding: 20px; border-radius: 8px; margin-top: 16px; white-space: pre-wrap; font-size: 14px; line-height: 1.6; max-height: 500px; overflow-y: auto; overflow-x: hidden; }

/* ===== ANIMATIONS ===== */
.fade-in { animation: fadeIn 0.3s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .sidebar { width: 64px; }
    .sidebar .logo span, .sidebar .nav-item span, .sidebar .sidebar-footer .user-info { display: none; }
    #main { margin-left: 64px; }
    .grid-2, .grid-3 { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .search-box input { width: 120px; }
}