/* EduConecta IA PRO - Premium Dark Mode CSS */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Manrope:wght@700;800&display=swap');

:root {
  --bg: #0B1020;
  --bg-soft: #0F172A;
  --surface-1: #121A2B;
  --surface-2: #182338;
  --surface-3: #1F2C44;
  --border: #27324A;
  --border-soft: rgba(148,163,184,0.12);
  --text-1: #F8FAFC;
  --text-2: #CBD5E1;
  --text-3: #94A3B8;
  --primary: #3B82F6;
  --primary-hover: #2563EB;
  --primary-soft: rgba(59,130,246,0.18);
  --accent: #22D3EE;
  --accent-soft: rgba(34,211,238,0.15);
  --success: #10B981;
  --success-soft: rgba(16,185,129,0.16);
  --warning: #F59E0B;
  --warning-soft: rgba(245,158,11,0.16);
  --danger: #EF4444;
  --danger-soft: rgba(239,68,68,0.16);
  --violet: #8B5CF6;
  --violet-soft: rgba(139,92,246,0.16);
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --shadow-sm: 0 4px 16px rgba(2,6,23,0.22);
  --shadow-md: 0 10px 30px rgba(2,6,23,0.32);
  --shadow-lg: 0 20px 50px rgba(2,6,23,0.42);
  --transition: all 0.25s cubic-bezier(0.4,0,0.2,1);
}

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

body {
  font-family: 'Inter', 'Segoe UI', sans-serif;
  background: radial-gradient(ellipse at top right, rgba(34,211,238,0.06) 0%, transparent 50%),
    radial-gradient(ellipse at bottom left, rgba(59,130,246,0.08) 0%, transparent 50%),
    var(--bg);
  color: var(--text-1);
  min-height: 100vh;
  overflow-x: hidden;
}

/* SCROLLBAR */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--surface-1); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--primary); }

/* ================================
   LAYOUT
================================ */
#app { display: flex; flex-direction: column; min-height: 100vh; }

.app-layout { display: flex; min-height: 100vh; }

.sidebar {
  width: 260px;
  min-width: 260px;
  background: linear-gradient(180deg, #0A0E1F 0%, #0F172A 40%, #121A2B 100%);
  border-right: 1px solid var(--border-soft);
  display: flex;
  flex-direction: column;
  padding: 0;
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  z-index: 100;
  transition: transform 0.3s ease;
  overflow-y: auto;
}

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

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.sidebar-logo-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), #1D4ED8);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  box-shadow: 0 4px 12px rgba(59,130,246,0.4);
}

.sidebar-logo-text h2 {
  font-family: 'Manrope', sans-serif;
  font-size: 1rem;
  font-weight: 800;
  color: var(--text-1);
  line-height: 1.2;
}

.sidebar-logo-text span {
  font-size: 0.7rem;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.5px;
}

.sidebar-user {
  background: var(--surface-2);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  border: 1px solid var(--border-soft);
}

.sidebar-user-name {
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--text-1);
  margin-bottom: 3px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-user-role {
  display: flex;
  align-items: center;
  gap: 6px;
}

.role-badge {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 20px;
  display: inline-block;
}
.role-admin { background: var(--primary-soft); color: var(--primary); border: 1px solid rgba(59,130,246,0.3); }
.role-professor { background: var(--success-soft); color: var(--success); border: 1px solid rgba(16,185,129,0.3); }
.role-diretoria { background: var(--violet-soft); color: var(--violet); border: 1px solid rgba(139,92,246,0.3); }
.role-aluno { background: var(--accent-soft); color: var(--accent); border: 1px solid rgba(34,211,238,0.3); }
.role-responsavel { background: var(--warning-soft); color: var(--warning); border: 1px solid rgba(245,158,11,0.3); }

.sidebar-nav { padding: 12px 14px; flex: 1; }

.nav-section-label {
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--text-3);
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 8px 8px 6px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  margin-bottom: 2px;
  text-decoration: none;
  color: var(--text-3);
  font-size: 0.88rem;
  font-weight: 500;
  border: 1px solid transparent;
}

.nav-item:hover {
  background: var(--surface-2);
  color: var(--text-1);
  border-color: var(--border-soft);
}

.nav-item.active {
  background: var(--primary-soft);
  color: var(--primary);
  border-color: rgba(59,130,246,0.25);
  font-weight: 700;
}

.nav-item i { width: 18px; text-align: center; font-size: 0.95rem; }

.sidebar-footer {
  padding: 14px;
  border-top: 1px solid var(--border-soft);
}

.btn-logout {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: var(--danger-soft);
  color: var(--danger);
  border: 1px solid rgba(239,68,68,0.25);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.88rem;
  font-weight: 600;
  transition: var(--transition);
}
.btn-logout:hover { background: rgba(239,68,68,0.25); }

.main-content {
  flex: 1;
  margin-left: 260px;
  padding: 28px 30px;
  min-height: 100vh;
}

/* ================================
   LOGIN PAGE
================================ */
.login-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: radial-gradient(ellipse at top, rgba(59,130,246,0.15) 0%, transparent 60%),
    radial-gradient(ellipse at bottom, rgba(34,211,238,0.08) 0%, transparent 60%),
    var(--bg);
}

.login-header { text-align: center; margin-bottom: 40px; }

.login-icon {
  width: 72px;
  height: 72px;
  border-radius: 20px;
  background: linear-gradient(135deg, var(--primary), #1D4ED8);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  margin: 0 auto 16px;
  box-shadow: 0 8px 24px rgba(59,130,246,0.5);
}

.login-title {
  font-family: 'Manrope', sans-serif;
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--text-1);
  letter-spacing: -0.5px;
}

.login-title span { color: var(--primary); }

.login-subtitle {
  color: var(--text-3);
  font-size: 1rem;
  margin-top: 8px;
}

.login-card {
  width: 100%;
  max-width: 420px;
  background: linear-gradient(180deg, var(--surface-1) 0%, var(--surface-2) 100%);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-lg);
}

.login-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 36px;
  max-width: 640px;
  width: 100%;
}

.feature-item {
  background: var(--surface-1);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: 20px 16px;
  text-align: center;
}

.feature-icon { font-size: 1.8rem; margin-bottom: 8px; }
.feature-title { font-size: 0.9rem; font-weight: 700; color: var(--text-1); margin-bottom: 4px; }
.feature-desc { font-size: 0.75rem; color: var(--text-3); }

/* ================================
   CARDS & COMPONENTS
================================ */
.card {
  background: linear-gradient(180deg, rgba(24,35,56,0.9) 0%, rgba(18,26,43,0.98) 100%);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-2px);
  border-color: rgba(59,130,246,0.2);
  box-shadow: var(--shadow-md);
}

.kpi-card {
  background: linear-gradient(135deg, var(--surface-1), var(--surface-2));
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
}

.kpi-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--primary);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.kpi-card.success::before { background: var(--success); }
.kpi-card.warning::before { background: var(--warning); }
.kpi-card.danger::before { background: var(--danger); }
.kpi-card.accent::before { background: var(--accent); }
.kpi-card.violet::before { background: var(--violet); }

.kpi-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: rgba(59,130,246,0.2);
}

.kpi-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  margin-bottom: 12px;
}

.kpi-icon.primary { background: var(--primary-soft); color: var(--primary); }
.kpi-icon.success { background: var(--success-soft); color: var(--success); }
.kpi-icon.warning { background: var(--warning-soft); color: var(--warning); }
.kpi-icon.danger { background: var(--danger-soft); color: var(--danger); }
.kpi-icon.accent { background: var(--accent-soft); color: var(--accent); }
.kpi-icon.violet { background: var(--violet-soft); color: var(--violet); }

.kpi-value {
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--text-1);
  line-height: 1;
  margin-bottom: 4px;
  font-family: 'Manrope', sans-serif;
}

.kpi-label {
  font-size: 0.78rem;
  color: var(--text-3);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ================================
   PAGE HEADER
================================ */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
  flex-wrap: wrap;
  gap: 16px;
}

.page-title {
  display: flex;
  align-items: center;
  gap: 14px;
}

.page-title-icon {
  width: 46px;
  height: 46px;
  border-radius: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}

.page-title-icon.primary { background: linear-gradient(135deg, var(--primary), #1D4ED8); box-shadow: 0 4px 14px rgba(59,130,246,0.4); }
.page-title-icon.success { background: linear-gradient(135deg, var(--success), #059669); box-shadow: 0 4px 14px rgba(16,185,129,0.4); }
.page-title-icon.violet { background: linear-gradient(135deg, var(--violet), #7C3AED); box-shadow: 0 4px 14px rgba(139,92,246,0.4); }
.page-title-icon.warning { background: linear-gradient(135deg, var(--warning), #D97706); box-shadow: 0 4px 14px rgba(245,158,11,0.4); }
.page-title-icon.accent { background: linear-gradient(135deg, var(--accent), #0891B2); box-shadow: 0 4px 14px rgba(34,211,238,0.4); }

.page-title h1 {
  font-family: 'Manrope', sans-serif;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-1);
  line-height: 1.2;
}

.page-title p { font-size: 0.82rem; color: var(--text-3); margin-top: 2px; }

/* ================================
   FORM ELEMENTS
================================ */
.form-group { margin-bottom: 18px; }

.form-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-2);
  margin-bottom: 6px;
  letter-spacing: 0.2px;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-soft);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-1);
  font-size: 0.88rem;
  font-family: inherit;
  transition: var(--transition);
  outline: none;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-soft);
  background: var(--surface-1);
}

.form-input::placeholder, .form-textarea::placeholder { color: var(--text-3); }

.form-select { cursor: pointer; }
.form-select option { background: var(--surface-1); color: var(--text-1); }

.form-textarea { resize: vertical; min-height: 90px; }

/* ================================
   BUTTONS
================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
  font-family: inherit;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-hover));
  color: white;
  box-shadow: 0 4px 14px rgba(59,130,246,0.3);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(59,130,246,0.45); }

.btn-success {
  background: linear-gradient(135deg, var(--success), #059669);
  color: white;
  box-shadow: 0 4px 14px rgba(16,185,129,0.3);
}
.btn-success:hover { transform: translateY(-2px); }

.btn-danger {
  background: linear-gradient(135deg, var(--danger), #DC2626);
  color: white;
}
.btn-danger:hover { transform: translateY(-2px); box-shadow: 0 4px 14px rgba(239,68,68,0.3); }

.btn-secondary {
  background: var(--surface-2);
  color: var(--text-2);
  border-color: var(--border-soft);
}
.btn-secondary:hover { background: var(--surface-3); color: var(--text-1); }

.btn-ghost {
  background: transparent;
  color: var(--text-3);
  border-color: transparent;
}
.btn-ghost:hover { background: var(--surface-2); color: var(--text-1); }

.btn-sm { padding: 6px 12px; font-size: 0.78rem; }
.btn-lg { padding: 12px 24px; font-size: 0.95rem; }

/* ================================
   TABLE
================================ */
.table-container {
  background: var(--surface-1);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  overflow: hidden;
}

table { width: 100%; border-collapse: collapse; }

thead { background: var(--surface-2); }

th {
  padding: 12px 16px;
  text-align: left;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  white-space: nowrap;
}

td {
  padding: 11px 16px;
  font-size: 0.85rem;
  color: var(--text-2);
  border-top: 1px solid var(--border-soft);
}

tr:hover td { background: rgba(255,255,255,0.02); }

/* ================================
   BADGES
================================ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 9px;
  border-radius: 20px;
  font-size: 0.72rem;
  font-weight: 700;
}

.badge-primary { background: var(--primary-soft); color: var(--primary); border: 1px solid rgba(59,130,246,0.25); }
.badge-success { background: var(--success-soft); color: var(--success); border: 1px solid rgba(16,185,129,0.25); }
.badge-warning { background: var(--warning-soft); color: var(--warning); border: 1px solid rgba(245,158,11,0.25); }
.badge-danger { background: var(--danger-soft); color: var(--danger); border: 1px solid rgba(239,68,68,0.25); }
.badge-accent { background: var(--accent-soft); color: var(--accent); border: 1px solid rgba(34,211,238,0.25); }
.badge-violet { background: var(--violet-soft); color: var(--violet); border: 1px solid rgba(139,92,246,0.25); }
.badge-gray { background: rgba(148,163,184,0.12); color: var(--text-3); border: 1px solid rgba(148,163,184,0.2); }

/* ================================
   TABS
================================ */
.tabs {
  display: flex;
  gap: 4px;
  background: var(--surface-1);
  padding: 5px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-soft);
  flex-wrap: wrap;
}

.tab-btn {
  padding: 8px 16px;
  border-radius: 7px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  color: var(--text-3);
  border: none;
  background: transparent;
  font-family: inherit;
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.tab-btn:hover { background: var(--surface-2); color: var(--text-1); }
.tab-btn.active {
  background: var(--primary-soft);
  color: var(--primary);
  box-shadow: 0 2px 8px rgba(59,130,246,0.2);
}

/* ================================
   MODAL
================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
  backdrop-filter: blur(4px);
}

.modal {
  background: var(--surface-1);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: 28px;
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  animation: slideUp 0.25s ease;
}

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

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 22px;
}

.modal-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-1);
}

.modal-close {
  background: var(--surface-2);
  border: 1px solid var(--border-soft);
  border-radius: 8px;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-3);
  font-size: 1rem;
  transition: var(--transition);
}
.modal-close:hover { background: var(--danger-soft); color: var(--danger); }

/* ================================
   CHAT
================================ */
.chat-container {
  display: flex;
  flex-direction: column;
  height: 420px;
  background: var(--surface-1);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.chat-msg {
  max-width: 80%;
  padding: 10px 14px;
  border-radius: 12px;
  font-size: 0.88rem;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
}

.chat-msg.user {
  align-self: flex-end;
  background: linear-gradient(135deg, var(--primary), var(--primary-hover));
  color: white;
  border-radius: 12px 12px 3px 12px;
}

.chat-msg.assistant {
  align-self: flex-start;
  background: var(--surface-2);
  color: var(--text-2);
  border: 1px solid var(--border-soft);
  border-radius: 12px 12px 12px 3px;
}

.chat-input-area {
  display: flex;
  gap: 8px;
  padding: 14px;
  border-top: 1px solid var(--border-soft);
  background: var(--surface-2);
}

.chat-input-area input {
  flex: 1;
  padding: 9px 14px;
  background: var(--bg-soft);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-1);
  font-size: 0.88rem;
  font-family: inherit;
  outline: none;
}
.chat-input-area input:focus { border-color: var(--primary); }

/* ================================
   CALENDAR
================================ */
.calendar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
}

.cal-day-header {
  text-align: center;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-3);
  text-transform: uppercase;
  padding: 8px 0;
  letter-spacing: 0.5px;
}

.cal-day {
  min-height: 72px;
  background: var(--surface-1);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  padding: 6px;
  transition: var(--transition);
  cursor: pointer;
}

.cal-day:hover { border-color: rgba(59,130,246,0.3); background: var(--surface-2); }
.cal-day.today { border-color: var(--primary); background: var(--primary-soft); }
.cal-day.other-month { opacity: 0.3; }
.cal-day.empty { background: transparent; border-color: transparent; cursor: default; }

.cal-day-num {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-2);
  margin-bottom: 4px;
}

.cal-day.today .cal-day-num {
  color: var(--primary);
  width: 22px;
  height: 22px;
  background: var(--primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
}

.cal-event {
  font-size: 0.65rem;
  font-weight: 600;
  padding: 2px 5px;
  border-radius: 3px;
  margin-bottom: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: white;
}

/* ================================
   NOTIFICATION / ALERTS
================================ */
.alert {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  animation: slideUp 0.25s ease;
}

.alert-success { background: var(--success-soft); color: var(--success); border: 1px solid rgba(16,185,129,0.25); }
.alert-danger { background: var(--danger-soft); color: var(--danger); border: 1px solid rgba(239,68,68,0.25); }
.alert-warning { background: var(--warning-soft); color: var(--warning); border: 1px solid rgba(245,158,11,0.25); }
.alert-info { background: var(--primary-soft); color: var(--primary); border: 1px solid rgba(59,130,246,0.25); }

/* ================================
   PROGRESS BAR
================================ */
.progress-bar-wrap {
  width: 100%;
  height: 7px;
  background: var(--surface-3);
  border-radius: 10px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  border-radius: 10px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transition: width 0.6s ease;
}

/* ================================
   NOTICE CARD
================================ */
.notice-card {
  background: var(--surface-1);
  border: 1px solid var(--border-soft);
  border-left: 5px solid var(--warning);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin-bottom: 12px;
  transition: var(--transition);
}
.notice-card:hover { transform: translateX(4px); border-left-color: var(--primary); box-shadow: var(--shadow-sm); }
.notice-card h4 { font-size: 0.95rem; font-weight: 700; color: var(--text-1); margin-bottom: 6px; }
.notice-card p { font-size: 0.85rem; color: var(--text-2); line-height: 1.6; margin-bottom: 8px; }
.notice-card .notice-meta { display: flex; gap: 14px; font-size: 0.75rem; color: var(--text-3); }

/* ================================
   GRID HELPERS
================================ */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.grid-6 { display: grid; grid-template-columns: repeat(6, 1fr); gap: 14px; }

/* ================================
   UTILITIES
================================ */
.text-muted { color: var(--text-3); }
.text-sm { font-size: 0.82rem; }
.text-xs { font-size: 0.72rem; }
.font-bold { font-weight: 700; }
.font-extrabold { font-weight: 800; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 16px; }
.mb-4 { margin-bottom: 24px; }
.mt-3 { margin-top: 16px; }
.mt-4 { margin-top: 24px; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.hidden { display: none !important; }

/* ================================
   LOADING
================================ */
.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(11,16,32,0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  backdrop-filter: blur(4px);
  flex-direction: column;
  gap: 16px;
}

/* ================================
   CHARTS
================================ */
.chart-card {
  background: var(--surface-1);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: 20px;
}

.chart-card h3 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-2);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ================================
   RESPONSIVE
================================ */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; padding: 16px; }
  .grid-2, .grid-3, .grid-4, .grid-6 { grid-template-columns: 1fr; }
  .login-features { grid-template-columns: 1fr; }
}

/* ================================
   SECTION DIVIDER
================================ */
.section-divider {
  height: 1px;
  background: var(--border-soft);
  margin: 24px 0;
}

/* ================================
   EMPTY STATE
================================ */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-3);
}
.empty-state i { font-size: 2.5rem; margin-bottom: 12px; display: block; opacity: 0.4; }
.empty-state p { font-size: 0.9rem; }

/* Toast notification */
#toast-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  background: var(--surface-2);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  padding: 12px 18px;
  min-width: 260px;
  max-width: 380px;
  font-size: 0.85rem;
  color: var(--text-1);
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: var(--shadow-md);
  animation: slideUp 0.25s ease;
}

.toast.success { border-left: 4px solid var(--success); }
.toast.error { border-left: 4px solid var(--danger); }
.toast.info { border-left: 4px solid var(--primary); }
.toast.warning { border-left: 4px solid var(--warning); }