/* ============================================
   SpendSmart — Premium Expense Tracker CSS
   ============================================ */


/* ─── CSS Variables ─── */
:root {
  --bg-primary: #0b0d17;
  --bg-secondary: #111527;
  --bg-card: #161b30;
  --bg-card-hover: #1c2238;
  --glass: rgba(255,255,255,0.04);
  --glass-border: rgba(255,255,255,0.08);
  --accent-purple: #7c3aed;
  --accent-purple-light: #9d5cf7;
  --accent-green: #10b981;
  --accent-red: #ef4444;
  --accent-blue: #3b82f6;
  --accent-orange: #f97316;
  --text-primary: #f0f2ff;
  --text-secondary: #a8b2d8;
  --text-muted: #6272a4;
  --sidebar-w: 240px;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 8px 32px rgba(0,0,0,0.4);
  --transition: all 0.25s cubic-bezier(0.4,0,0.2,1);
}

/* ─── Reset ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Outfit', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  overflow-x: hidden;
}

/* ─── Scrollbar ─── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--accent-purple); border-radius: 3px; }

/* ─── Sidebar ─── */
.sidebar {
  width: var(--sidebar-w);
  background: var(--bg-secondary);
  border-right: 1px solid var(--glass-border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 100;
  transition: transform 0.3s ease;
}

.sidebar-header {
  padding: 1.5rem 1.25rem;
  border-bottom: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.logo-icon { font-size: 1.6rem; }

.logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  background: linear-gradient(135deg, #7c3aed, #3b82f6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.sidebar-close {
  display: none;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 0.3rem;
}

.nav {
  flex: 1;
  padding: 1.25rem 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  transition: var(--transition);
  cursor: pointer;
}

.nav-item:hover {
  background: var(--glass);
  color: var(--text-primary);
}

.nav-item.active {
  background: linear-gradient(135deg, rgba(124,58,237,0.2), rgba(59,130,246,0.1));
  color: var(--accent-purple-light);
  border: 1px solid rgba(124,58,237,0.3);
}

.nav-icon { font-size: 1.1rem; }

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

.user-card {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem;
  border-radius: var(--radius-sm);
  background: var(--glass);
}

.user-avatar { font-size: 1.4rem; }
.user-name { font-size: 0.85rem; font-weight: 600; }
.user-sub { font-size: 0.72rem; color: var(--text-muted); }

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

/* ─── Topbar ─── */
.topbar {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 2rem;
  background: rgba(11,13,23,0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  position: sticky; top: 0; z-index: 50;
}

.menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.3rem;
  cursor: pointer;
}

.topbar-title {
  font-size: 1.2rem;
  font-weight: 700;
  flex: 1;
}

.topbar-actions {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.btn-add {
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
  border: none;
  color: #fff;
  padding: 0.55rem 1.2rem;
  border-radius: 25px;
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-add:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(124,58,237,0.4);
}

.btn-export {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  padding: 0.55rem 1.1rem;
  border-radius: 25px;
  font-family: 'Outfit', sans-serif;
  font-weight: 500;
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-export:hover {
  border-color: var(--accent-purple);
  color: var(--text-primary);
}

/* ─── Pages ─── */
.page {
  display: none;
  padding: 1.5rem 2rem 2rem;
  animation: fadeIn 0.35s ease;
}

.page.active { display: block; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ─── Cards Grid ─── */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 80px; height: 80px;
  border-radius: 50%;
  opacity: 0.08;
  transform: translate(20px, -20px);
}

.card-income::before { background: var(--accent-green); }
.card-expense::before { background: var(--accent-red); }
.card-savings::before { background: var(--accent-blue); }
.card-txn::before { background: var(--accent-orange); }

.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }

.card-icon { font-size: 1.8rem; }
.card-info { flex: 1; }
.card-label { font-size: 0.75rem; color: var(--text-muted); font-weight: 500; text-transform: uppercase; letter-spacing: 0.05em; }
.card-value { font-size: 1.5rem; font-weight: 700; margin-top: 0.2rem; }
.card-income .card-value { color: var(--accent-green); }
.card-expense .card-value { color: var(--accent-red); }
.card-savings .card-value { color: var(--accent-blue); }
.card-txn .card-value { color: var(--accent-orange); }
.card-trend { font-size: 0.72rem; color: var(--text-muted); white-space: nowrap; }

/* ─── Charts ─── */
.charts-row {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.chart-box {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.chart-box-sm { }

.chart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.chart-header h2 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.filter-select-sm {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  padding: 0.3rem 0.6rem;
  border-radius: 8px;
  font-family: 'Outfit', sans-serif;
  font-size: 0.8rem;
  cursor: pointer;
}

.pie-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.pie-legend-item {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.72rem;
  color: var(--text-secondary);
}

.legend-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* ─── Section Box ─── */
.section-box {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.section-header h2 {
  font-size: 1rem;
  font-weight: 600;
}

.view-all {
  color: var(--accent-purple-light);
  font-size: 0.82rem;
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
}

.view-all:hover { opacity: 0.8; }

/* ─── Transaction Items ─── */
.txn-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--glass-border);
  transition: var(--transition);
  animation: fadeIn 0.3s ease;
}

.txn-item:last-child { border-bottom: none; }
.txn-item:hover { background: var(--glass); border-radius: 8px; padding-left: 0.5rem; }

.txn-cat-icon {
  width: 40px; height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.txn-details { flex: 1; }
.txn-desc { font-size: 0.9rem; font-weight: 500; }
.txn-meta { font-size: 0.72rem; color: var(--text-muted); margin-top: 0.15rem; }

.txn-amount {
  font-size: 1rem;
  font-weight: 700;
}

.txn-amount.income { color: var(--accent-green); }
.txn-amount.expense { color: var(--accent-red); }

/* ─── Transaction Table ─── */
.filter-bar {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.filter-input, .filter-select {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  padding: 0.55rem 0.9rem;
  border-radius: var(--radius-sm);
  font-family: 'Outfit', sans-serif;
  font-size: 0.85rem;
  transition: var(--transition);
}

.filter-input { flex: 1; min-width: 180px; }
.filter-select { cursor: pointer; }
.filter-input:focus, .filter-select:focus { outline: none; border-color: var(--accent-purple); }

.txn-table-wrap { overflow-x: auto; }

.txn-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.txn-table th {
  text-align: left;
  padding: 0.75rem 1rem;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--glass-border);
}

.txn-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  transition: var(--transition);
}

.txn-table tbody tr:hover td { background: var(--glass); }
.txn-table tbody tr:last-child td { border-bottom: none; }

.badge {
  padding: 0.25rem 0.65rem;
  border-radius: 20px;
  font-size: 0.72rem;
  font-weight: 600;
}

.badge-income { background: rgba(16,185,129,0.15); color: var(--accent-green); }
.badge-expense { background: rgba(239,68,68,0.15); color: var(--accent-red); }

.btn-icon {
  background: none;
  border: 1px solid var(--glass-border);
  color: var(--text-muted);
  padding: 0.35rem 0.55rem;
  border-radius: 7px;
  cursor: pointer;
  font-size: 0.8rem;
  transition: var(--transition);
  margin-right: 0.3rem;
}

.btn-icon:hover { border-color: var(--accent-purple); color: var(--accent-purple-light); }
.btn-icon.del:hover { border-color: var(--accent-red); color: var(--accent-red); }

/* ─── Empty State ─── */
.empty-state {
  text-align: center;
  padding: 2.5rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ─── Reports Page ─── */
.report-filters {
  display: flex;
  gap: 1rem;
  align-items: flex-end;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.filter-group label {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ─── Category Summary ─── */
.category-summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}

.cat-summary-card {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 1rem;
}

.cat-summary-card .cat-name {
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.3rem;
}

.cat-summary-card .cat-amount {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent-red);
}

.cat-summary-card .cat-count {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}

.cat-progress {
  width: 100%;
  height: 4px;
  background: var(--glass-border);
  border-radius: 2px;
  margin-top: 0.75rem;
  overflow: hidden;
}

.cat-progress-bar {
  height: 100%;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--accent-purple), var(--accent-blue));
  transition: width 0.5s ease;
}

/* ─── Budget Page ─── */
.budget-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.budget-input-card {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 1rem;
}

.budget-input-card label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
  display: block;
  margin-bottom: 0.5rem;
}

.budget-input-card input {
  width: 100%;
  background: var(--bg-primary);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  padding: 0.5rem 0.75rem;
  border-radius: 8px;
  font-family: 'Outfit', sans-serif;
  font-size: 0.9rem;
  transition: var(--transition);
}

.budget-input-card input:focus { outline: none; border-color: var(--accent-purple); }

.budget-status-list { display: flex; flex-direction: column; gap: 0.75rem; }

.budget-status-item {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.budget-status-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
}

.budget-status-row .cat-name { font-weight: 600; }
.budget-status-row .budget-nums { color: var(--text-muted); font-size: 0.8rem; }

.budget-bar {
  width: 100%;
  height: 6px;
  background: var(--glass-border);
  border-radius: 3px;
  overflow: hidden;
}

.budget-bar-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.6s ease;
}

.budget-bar-fill.ok { background: linear-gradient(90deg, var(--accent-green), #34d399); }
.budget-bar-fill.warn { background: linear-gradient(90deg, var(--accent-orange), #fbbf24); }
.budget-bar-fill.over { background: linear-gradient(90deg, var(--accent-red), #f87171); }

/* ─── Modal ─── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.65);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 2rem;
  width: 90%;
  max-width: 500px;
  box-shadow: 0 24px 64px rgba(0,0,0,0.5);
  transform: scale(0.95);
  transition: transform 0.25s ease;
}

.modal-overlay.active .modal { transform: scale(1); }
.modal-sm { max-width: 380px; }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.modal-header h2 { font-size: 1.1rem; font-weight: 700; }

.modal-close {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  color: var(--text-muted);
  width: 30px; height: 30px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 0.8rem;
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition);
}

.modal-close:hover { background: rgba(239,68,68,0.15); color: var(--accent-red); border-color: var(--accent-red); }

.modal-form { display: flex; flex-direction: column; gap: 1rem; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-group input, .form-group select {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  padding: 0.65rem 0.9rem;
  border-radius: var(--radius-sm);
  font-family: 'Outfit', sans-serif;
  font-size: 0.9rem;
  transition: var(--transition);
}

.form-group input:focus, .form-group select:focus {
  outline: none;
  border-color: var(--accent-purple);
  box-shadow: 0 0 0 3px rgba(124,58,237,0.15);
}

.form-group select option { background: var(--bg-card); }

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.btn-cancel {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  padding: 0.6rem 1.25rem;
  border-radius: 25px;
  font-family: 'Outfit', sans-serif;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

.btn-cancel:hover { border-color: var(--accent-purple); color: var(--text-primary); }

.btn-submit {
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
  border: none;
  color: #fff;
  padding: 0.6rem 1.5rem;
  border-radius: 25px;
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.btn-submit:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(124,58,237,0.4); }

.btn-delete {
  background: linear-gradient(135deg, var(--accent-red), #f87171);
  border: none;
  color: #fff;
  padding: 0.6rem 1.5rem;
  border-radius: 25px;
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.btn-delete:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(239,68,68,0.4); }

/* ─── Toast ─── */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 500;
  box-shadow: var(--shadow);
  transform: translateY(100px);
  opacity: 0;
  transition: var(--transition);
  z-index: 300;
  max-width: 300px;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

.toast.success { border-color: var(--accent-green); color: var(--accent-green); }
.toast.error { border-color: var(--accent-red); color: var(--accent-red); }

/* ─── Category Color Map ─── */
.cat-food { background: rgba(249,115,22,0.15); }
.cat-transport { background: rgba(59,130,246,0.15); }
.cat-shopping { background: rgba(236,72,153,0.15); }
.cat-bills { background: rgba(234,179,8,0.15); }
.cat-entertainment { background: rgba(168,85,247,0.15); }
.cat-health { background: rgba(16,185,129,0.15); }
.cat-education { background: rgba(99,102,241,0.15); }
.cat-travel { background: rgba(20,184,166,0.15); }
.cat-salary { background: rgba(16,185,129,0.15); }
.cat-freelance { background: rgba(59,130,246,0.15); }
.cat-investment { background: rgba(124,58,237,0.15); }
.cat-other { background: rgba(107,114,128,0.15); }

/* ─── Responsive ─── */
@media (max-width: 1100px) {
  .cards-grid { grid-template-columns: repeat(2, 1fr); }
  .charts-row { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .sidebar-close { display: flex; }
  .menu-btn { display: block; }
  .main { margin-left: 0; }
  .topbar { padding: 1rem; }
  .page { padding: 1rem; }
  .cards-grid { grid-template-columns: repeat(2, 1fr); }
  .form-row { grid-template-columns: 1fr; }
  .topbar-actions .btn-export { display: none; }
}

@media (max-width: 480px) {
  .cards-grid { grid-template-columns: 1fr; }
  .filter-bar { flex-direction: column; }
  .filter-input { min-width: 100%; }
}