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

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

:root {
  --bg-primary: #000000;
  --bg-surface: #111111;
  --bg-card: #1a1a1a;
  --border: #2a2a2a;
  --text-primary: #ffffff;
  --text-secondary: #a0a0a0;
  --text-muted: #555555;

  --blue-bg: #dbeafe; --blue-text: #2563eb;
  --green-bg: #dcfce7; --green-text: #16a34a;
  --yellow-bg: #fef9c3; --yellow-text: #ca8a04;
  --violet-bg: #f3e8ff; --violet-text: #9333ea;
  --red: #ef4444;

  --sidebar-w: 240px;
  --radius: 10px;
  --transition: 150ms ease;
}

html { font-size: 15px; }
body {
  font-family: 'Poppins', sans-serif;
  font-weight: 300;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
}

a { color: inherit; text-decoration: none; }
button, input, select, textarea { font-family: inherit; }
img { max-width: 100%; }

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

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

.sidebar-logo {
  padding: 24px 20px;
  border-bottom: 1px solid var(--border);
}
.sidebar-logo .logo-text {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sidebar-logo .logo-sub {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.sidebar-nav { flex: 1; padding: 16px 12px; overflow-y: auto; }
.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 400;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  margin-bottom: 2px;
}
.nav-item:hover { background: var(--bg-card); color: var(--text-primary); }
.nav-item.active { background: var(--bg-card); color: var(--text-primary); font-weight: 500; }
.nav-item svg { width: 18px; height: 18px; flex-shrink: 0; }

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

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

.topbar {
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  padding: 16px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 50;
}
.topbar-title {
  font-size: 1.1rem;
  font-weight: 500;
}
.topbar-right { display: flex; align-items: center; gap: 12px; }

.hamburger {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 4px;
}

.page-content { padding: 28px; flex: 1; }

/* ============================================================
   Cards & Grids
   ============================================================ */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
.card-title {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}
.card-value {
  font-size: 1.6rem;
  font-weight: 600;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}
.charts-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}
.charts-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

/* ============================================================
   Badges
   ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 500;
}
.badge-blue   { background: var(--blue-bg);   color: var(--blue-text); }
.badge-green  { background: var(--green-bg);  color: var(--green-text); }
.badge-yellow { background: var(--yellow-bg); color: var(--yellow-text); }
.badge-violet { background: var(--violet-bg); color: var(--violet-text); }
.badge-red    { background: #fef2f2; color: var(--red); }

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 18px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 500;
  transition: opacity var(--transition), background var(--transition);
}
.btn:hover { opacity: 0.85; }
.btn-primary { background: var(--blue-text); color: #fff; }
.btn-success { background: var(--green-text); color: #fff; }
.btn-danger  { background: var(--red); color: #fff; }
.btn-ghost   { background: var(--bg-card); color: var(--text-secondary); border: 1px solid var(--border); }
.btn-ghost:hover { color: var(--text-primary); }
.btn svg { width: 16px; height: 16px; }
.btn-sm { padding: 6px 12px; font-size: 0.8rem; }

/* ============================================================
   Forms
   ============================================================ */
.form-group { margin-bottom: 16px; }
.form-label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 6px;
  font-weight: 400;
}
.form-control {
  width: 100%;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-primary);
  padding: 10px 14px;
  font-size: 0.875rem;
  transition: border-color var(--transition);
  outline: none;
}
.form-control:focus { border-color: var(--blue-text); }
.form-control::placeholder { color: var(--text-muted); }
select.form-control option { background: var(--bg-card); }
textarea.form-control { resize: vertical; min-height: 80px; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }

/* ============================================================
   Tables
   ============================================================ */
.table-wrap { overflow-x: auto; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}
thead th {
  text-align: left;
  padding: 10px 14px;
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border);
}
tbody td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
tbody tr:hover { background: rgba(255,255,255,0.02); }
tbody tr:last-child td { border-bottom: none; }
.tfoot-row td {
  padding: 12px 14px;
  border-top: 2px solid var(--border);
  font-weight: 600;
}

/* ============================================================
   Modal
   ============================================================ */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.75);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 200ms ease;
}
.modal-overlay.active { opacity: 1; pointer-events: auto; }
.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
  transform: translateY(20px);
  transition: transform 200ms ease;
}
.modal-overlay.active .modal { transform: translateY(0); }
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}
.modal-title { font-size: 1rem; font-weight: 500; }
.modal-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 4px;
}
.modal-close:hover { color: var(--text-primary); }
.modal-body { padding: 24px; }
.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

/* ============================================================
   Tabs
   ============================================================ */
.tab-bar {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
  overflow-x: auto;
}
.tab-btn {
  padding: 10px 16px;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 400;
  cursor: pointer;
  white-space: nowrap;
  transition: color var(--transition), border-color var(--transition);
  font-family: inherit;
}
.tab-btn:hover { color: var(--text-primary); }
.tab-btn.active { color: var(--text-primary); border-bottom-color: var(--blue-text); font-weight: 500; }

/* ============================================================
   Allocation Table
   ============================================================ */
.alloc-parent td { font-weight: 600; color: var(--text-primary); background: rgba(255,255,255,0.03); }
.alloc-child td { padding-left: 32px; color: var(--text-secondary); }

/* ============================================================
   Toggle Switch
   ============================================================ */
.toggle-wrap { display: flex; align-items: center; gap: 12px; }
.toggle {
  position: relative;
  width: 44px;
  height: 24px;
  flex-shrink: 0;
}
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background: var(--border);
  border-radius: 999px;
  transition: background var(--transition);
}
.toggle-slider::before {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  background: #fff;
  border-radius: 50%;
  left: 3px;
  top: 3px;
  transition: transform var(--transition);
}
.toggle input:checked + .toggle-slider { background: var(--blue-text); }
.toggle input:checked + .toggle-slider::before { transform: translateX(20px); }

/* ============================================================
   Month Nav
   ============================================================ */
.month-nav {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}
.month-nav-btn {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-secondary);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: color var(--transition);
}
.month-nav-btn:hover { color: var(--text-primary); }
.month-nav-btn svg { width: 16px; height: 16px; }
.month-label { font-size: 1rem; font-weight: 500; min-width: 160px; text-align: center; }

/* ============================================================
   Accumulation Funds
   ============================================================ */
.funds-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.fund-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
.fund-icon { width: 36px; height: 36px; margin-bottom: 10px; color: var(--blue-text); }
.fund-name { font-size: 0.8rem; color: var(--text-secondary); margin-bottom: 4px; }
.fund-amount { font-size: 1.2rem; font-weight: 600; }

/* ============================================================
   Login Page
   ============================================================ */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
  padding: 20px;
}
.login-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  width: 100%;
  max-width: 400px;
}
.login-logo { text-align: center; margin-bottom: 32px; }
.login-logo h1 { font-size: 1.4rem; font-weight: 600; }
.login-logo p { color: var(--text-muted); font-size: 0.875rem; margin-top: 4px; }
.alert {
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 0.875rem;
  margin-bottom: 16px;
}
.alert-error { background: #2d1b1b; border: 1px solid #5f2020; color: #fca5a5; }
.alert-success { background: #1b2d1b; border: 1px solid #205f20; color: #86efac; }

/* ============================================================
   Pagination
   ============================================================ */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-top: 20px;
}
.page-link {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-secondary);
  padding: 6px 12px;
  font-size: 0.875rem;
  cursor: pointer;
  transition: color var(--transition), background var(--transition);
}
.page-link:hover, .page-link.active { background: var(--blue-text); color: #fff; border-color: var(--blue-text); }

/* ============================================================
   Section headings
   ============================================================ */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}
.section-title { font-size: 1rem; font-weight: 500; }

/* ============================================================
   Filter bar
   ============================================================ */
.filter-bar {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.filter-bar .form-control { width: auto; }

/* ============================================================
   AI Preview block
   ============================================================ */
.ai-preview {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  margin-top: 16px;
  display: none;
}
.ai-preview.visible { display: block; }
.ai-preview-title {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ============================================================
   Settings sections
   ============================================================ */
.settings-section {
  margin-bottom: 32px;
}
.settings-section-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.priority-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
.priority-option {
  display: none;
}
.priority-label {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.875rem;
  transition: border-color var(--transition), color var(--transition);
}
.priority-option:checked + .priority-label {
  border-color: var(--blue-text);
  color: var(--blue-text);
  background: rgba(37, 99, 235, 0.1);
}

/* ============================================================
   Loading spinner
   ============================================================ */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255,255,255,0.2);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ============================================================
   Payslip preview
   ============================================================ */
.payslip-preview {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}
.payslip-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}
.payslip-title { font-size: 1.2rem; font-weight: 600; }
.payslip-meta { font-size: 0.8rem; color: var(--text-secondary); line-height: 1.8; text-align: right; }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 900px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .main {
    margin-left: 0;
  }
  .hamburger { display: flex; }
  .metrics-grid { grid-template-columns: 1fr 1fr; }
  .charts-grid { grid-template-columns: 1fr; }
  .charts-grid-3 { grid-template-columns: 1fr; }
  .funds-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .form-row-3 { grid-template-columns: 1fr; }
  .priority-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .metrics-grid { grid-template-columns: 1fr; }
  .page-content { padding: 16px; }
  .topbar { padding: 12px 16px; }
}

/* Sidebar overlay for mobile */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 99;
}
.sidebar-overlay.active { display: block; }