/* ========================
   Reset & CSS Variables
   ======================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg:          #0f172a;
  --surface:     #1e293b;
  --surface-2:   #263245;
  --border:      #334155;
  --text:        #f1f5f9;
  --text-muted:  #94a3b8;
  --text-dim:    #475569;
  --income:      #22c55e;
  --income-bg:   rgba(34, 197, 94, 0.12);
  --income-bd:   rgba(34, 197, 94, 0.3);
  --expense:     #f43f5e;
  --expense-bg:  rgba(244, 63, 94, 0.12);
  --expense-bd:  rgba(244, 63, 94, 0.3);
  --primary:     #6366f1;
  --primary-h:   #4f46e5;
  --primary-glow: rgba(99, 102, 241, 0.35);
  --r:           12px;
  --r-sm:        8px;
  --shadow:      0 4px 6px -1px rgba(0,0,0,0.4), 0 2px 4px -2px rgba(0,0,0,0.3);
  --shadow-lg:   0 10px 25px -5px rgba(0,0,0,0.5), 0 4px 10px -5px rgba(0,0,0,0.4);
}

html { font-size: 16px; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  line-height: 1.5;
  min-height: 100vh;
}

.app-main {
  min-height: 100vh;
}

/* ========================
   Page Wrapper
   ======================== */
.page-wrapper {
  max-width: 1280px;
  margin: 0 auto;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* ========================
   Forms
   ======================== */
.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 0.375rem;
  letter-spacing: 0.01em;
}

.form-group input,
.form-group select {
  width: 100%;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--text);
  padding: 0.625rem 0.875rem;
  font-size: 0.9375rem;
  transition: border-color 0.15s, box-shadow 0.15s;
  outline: none;
  appearance: none;
}

.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2394a3b8' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.875rem center;
  padding-right: 2.25rem;
}

.form-group input:focus,
.form-group select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.form-group input::placeholder { color: var(--text-dim); }
.form-group select option { background: var(--surface); color: var(--text); }

input[type="date"]::-webkit-calendar-picker-indicator {
  filter: invert(0.6);
  cursor: pointer;
}

/* ========================
   Form Group Header
   ======================== */
.form-group-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.375rem;
}

.form-group-header label {
  margin-bottom: 0;
}

.btn-link {
  background: none;
  border: none;
  color: var(--primary);
  cursor: pointer;
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 0;
  transition: color 0.15s;
}

.btn-link:hover { color: var(--primary-h); }

/* ========================
   Inline Category Form
   ======================== */
.inline-form {
  margin-top: 0.5rem;
}

.inline-form form {
  display: flex;
  gap: 0.5rem;
}

.inline-form input {
  flex: 1;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--text);
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.inline-form input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.inline-form input::placeholder { color: var(--text-dim); }

.btn-inline {
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--r-sm);
  padding: 0.5rem 0.875rem;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s;
}

.btn-inline:hover { background: var(--primary-h); }

/* ========================
   Category Pills
   ======================== */
.category-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  margin-top: 0.5rem;
}

.category-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.2rem 0.5rem 0.2rem 0.75rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.category-pill-delete {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 0.625rem;
  padding: 0.1rem 0.2rem;
  border-radius: 50%;
  line-height: 1;
  transition: color 0.15s, background 0.15s;
}

.category-pill-delete:hover {
  color: var(--expense);
  background: var(--expense-bg);
}

/* ========================
   Buttons
   ======================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.375rem;
  width: 100%;
  padding: 0.6875rem 1.5rem;
  border: none;
  border-radius: var(--r-sm);
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, transform 0.15s, box-shadow 0.15s;
  margin-top: 0.25rem;
  background: var(--primary);
  color: #fff;
}

.btn:hover {
  background: var(--primary-h);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px var(--primary-glow);
}

.btn:active {
  transform: translateY(0);
}

/* ========================
   Modal
   ======================== */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 200;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.modal-overlay.is-open {
  display: flex;
}

.modal-overlay.modal-top {
  z-index: 300;
}

.modal-window {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 1.75rem;
  width: 100%;
  max-width: 480px;
  position: relative;
  box-shadow: var(--shadow-lg);
  max-height: 90vh;
  overflow-y: auto;
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1rem;
  padding: 0.25rem 0.5rem;
  border-radius: var(--r-sm);
  line-height: 1;
  transition: color 0.15s, background 0.15s;
}

.modal-close:hover {
  color: var(--text);
  background: var(--surface-2);
}

/* ========================
   Filters Bar
   ======================== */
.filters-bar {
  display: flex;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  margin-bottom: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  box-shadow: var(--shadow);
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.filter-label {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.filter-select {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--text);
  padding: 0.45rem 2rem 0.45rem 0.75rem;
  font-size: 0.875rem;
  outline: none;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2394a3b8' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.625rem center;
  transition: border-color 0.15s;
}

.filter-select:focus { border-color: var(--primary); }
.filter-select option { background: var(--surface); }

.filter-group-categories {
  position: relative;
}

.filter-categories-btn {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--text-muted);
  padding: 0.45rem 0.875rem;
  font-size: 0.875rem;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
  white-space: nowrap;
}

.filter-categories-btn.has-active {
  border-color: var(--primary);
  color: var(--primary);
}

.categories-panel {
  position: absolute;
  top: calc(100% + 0.375rem);
  left: 0;
  z-index: 50;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 0.75rem;
  min-width: 200px;
  box-shadow: var(--shadow-lg);
}

.categories-group-label {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0.5rem 0 0.3rem;
  padding-bottom: 0.25rem;
  border-bottom: 1px solid var(--border);
}

.categories-group-label:first-child { margin-top: 0; }
.categories-group-label.income  { color: var(--income); }
.categories-group-label.expense { color: var(--expense); }

.category-checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.3rem 0.25rem;
  font-size: 0.875rem;
  cursor: pointer;
  border-radius: var(--r-sm);
  transition: background 0.1s;
}

.category-checkbox-label:hover { background: var(--surface-2); }

.category-checkbox-label input[type="checkbox"] {
  accent-color: var(--primary);
  width: 14px;
  height: 14px;
  cursor: pointer;
  flex-shrink: 0;
}

.categories-empty {
  font-size: 0.875rem;
  color: var(--text-dim);
}

.categories-panel-footer {
  margin-top: 0.625rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
}

.btn-reset-filters {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--text-muted);
  padding: 0.45rem 0.875rem;
  font-size: 0.875rem;
  cursor: pointer;
  margin-top: auto;
  transition: color 0.15s, border-color 0.15s;
  white-space: nowrap;
}

.btn-reset-filters:hover {
  color: var(--expense);
  border-color: var(--expense);
}

/* ========================
   Transaction Tables
   ======================== */
.tables-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.table-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.table-scroll {
  overflow-x: auto;
}

.table-card.income  { border-top: 3px solid var(--income); }
.table-card.expense { border-top: 3px solid var(--expense); }

.table-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.125rem 1.375rem;
  border-bottom: 1px solid var(--border);
}

.table-title {
  font-size: 0.9375rem;
  font-weight: 600;
}

.table-head-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.table-total {
  font-size: 1rem;
  font-weight: 700;
}

.table-card.income  .table-total { color: var(--income); }
.table-card.expense .table-total { color: var(--expense); }

.btn-table-add {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.3rem 0.75rem;
  border-radius: var(--r-sm);
  transition: color 0.15s, border-color 0.15s, background 0.15s;
  white-space: nowrap;
}

.btn-table-add:hover {
  color: var(--text);
  border-color: var(--primary);
  background: rgba(99, 102, 241, 0.08);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8125rem;
}

.data-table thead th {
  background: rgba(255,255,255,0.03);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.5625rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.data-table tbody td {
  padding: 0.6875rem 1rem;
  border-bottom: 1px solid rgba(51,65,85,0.6);
  color: var(--text);
  vertical-align: middle;
}

.data-table tbody tr:last-child td { border-bottom: none; }

.data-table tbody tr:hover td {
  background: rgba(255,255,255,0.03);
}

.data-table .col-amount {
  font-weight: 700;
  white-space: nowrap;
}

.table-card.income  .col-amount { color: var(--income); }
.table-card.expense .col-amount { color: var(--expense); }

.data-table .col-note {
  color: var(--text-muted);
  font-style: italic;
  max-width: 130px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.data-table .col-date { white-space: nowrap; color: var(--text-muted); }

.data-table .col-cat {
  max-width: 110px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.data-table .col-action { width: 2rem; text-align: center; }

.tr-clickable { cursor: pointer; }
.tr-clickable:hover td { background: var(--hover-bg, rgba(255,255,255,0.03)); }

.btn-delete {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 0.75rem;
  padding: 0.25rem 0.375rem;
  border-radius: var(--r-sm);
  transition: color 0.15s, background 0.15s;
  line-height: 1;
}

.btn-delete:hover {
  color: var(--expense);
  background: var(--expense-bg);
}

.empty-state {
  text-align: center;
  color: var(--text-dim);
  padding: 2.75rem 1rem;
  font-size: 0.9375rem;
}

.empty-icon { font-size: 2rem; margin-bottom: 0.5rem; }

/* ========================
   Login Page
   ======================== */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background: radial-gradient(ellipse at 50% 0%, rgba(99,102,241,0.15) 0%, transparent 70%);
}

.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 2.5rem 2.25rem;
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow-lg);
}

.login-logo {
  font-size: 3rem;
  text-align: center;
  margin-bottom: 0.625rem;
  line-height: 1;
}

.login-title {
  font-size: 1.5rem;
  font-weight: 700;
  text-align: center;
  letter-spacing: -0.02em;
  margin-bottom: 0.25rem;
}

.login-sub {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-bottom: 2rem;
}

.login-form .form-group { margin-bottom: 1rem; }

.login-form .form-group label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 0.375rem;
}

.login-form input {
  width: 100%;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--text);
  padding: 0.75rem 1rem;
  font-size: 0.9375rem;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.login-form input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.login-form input::placeholder { color: var(--text-dim); }

.login-btn {
  width: 100%;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--r-sm);
  padding: 0.8125rem;
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  margin-top: 1.5rem;
  transition: background 0.15s, transform 0.15s, box-shadow 0.15s;
}

.login-btn:hover {
  background: var(--primary-h);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px var(--primary-glow);
}

.login-error {
  color: #f87171;
  font-size: 0.8125rem;
  text-align: center;
  margin-bottom: 0.5rem;
}

.login-form input.error {
  border-color: #f87171;
  box-shadow: 0 0 0 3px rgba(248, 113, 113, 0.2);
}

/* ========================
   Responsive
   ======================== */
@media (max-width: 900px) {
  .tables-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .page-wrapper { padding: 1rem; }
  .filters-bar  { gap: 0.5rem; }
}