:root {
  color-scheme: dark;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --bg: #0a0f18;
  --panel: #111a27;
  --panel-2: #182233;
  --line: #2a374a;
  --text: #edf3fa;
  --muted: #9aabbe;
  --accent: #3b82f6;
  --accent-2: #2563eb;
  --danger: #ef4444;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  /* Un solo fondo plano + gradiente suave: varios radial-gradient + backdrop-filter suelen costar GPU en repaint */
  background: linear-gradient(165deg, #0d1522 0%, var(--bg) 45%, #0b121c 100%);
  color: var(--text);
}

.hidden {
  display: none !important;
}

.auth-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.auth-card,
.card,
.sidebar {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow);
}

.auth-card {
  width: min(620px, 100%);
  padding: 28px;
}

.auth-card h1 {
  margin: 0 0 8px;
}

.auth-card p {
  margin: 0 0 20px;
  color: var(--muted);
}

label {
  font-size: 0.9rem;
}

input,
select,
button {
  width: 100%;
  border: 1px solid var(--line);
  background: var(--panel-2);
  color: var(--text);
  border-radius: 12px;
  padding: 10px 12px;
  margin: 8px 0 12px;
  transition: border-color 0.12s ease, box-shadow 0.12s ease;
}

input:focus,
select:focus,
button:focus-visible {
  outline: none;
  border-color: #5ca1ff;
  box-shadow: 0 0 0 3px rgba(92, 161, 255, 0.2);
}

button {
  cursor: pointer;
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
  border: none;
  font-weight: 600;
}

button:hover {
  filter: brightness(1.06);
}

button:disabled {
  opacity: 0.75;
  cursor: not-allowed;
  transform: none;
}

button.ghost {
  background: transparent;
  border: 1px solid var(--line);
}

button.small {
  width: auto;
  padding: 6px 10px;
  margin: 0;
}

.error {
  color: var(--danger);
  min-height: 18px;
  margin: 0;
  font-size: 0.9rem;
}

.app-shell {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 18px;
  min-height: 100vh;
  padding: 16px;
}

.sidebar {
  padding: 14px;
  position: sticky;
  top: 16px;
  height: calc(100vh - 32px);
}

.brand h2 {
  margin: 0;
  letter-spacing: 0.2px;
}

.brand small {
  color: var(--muted);
  word-break: break-all;
}

.company-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.company-header h3 {
  margin: 0;
}

.companies-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.companies-list button {
  text-align: left;
}

.companies-list button.active {
  outline: 2px solid var(--accent);
  background: rgba(59, 130, 246, 0.15);
}

.content {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(140px, 1fr));
  gap: 12px;
}

.kpi-card {
  background: linear-gradient(180deg, rgba(59, 130, 246, 0.13), rgba(59, 130, 246, 0.03));
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px 14px;
}

.kpi-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.kpi-card h3 {
  margin: 8px 0 0;
  font-size: 1.35rem;
}

.content-header {
  padding: 8px 2px;
}

.content-header h1 {
  margin: 0;
  font-size: 1.85rem;
}

.content-header p {
  margin: 6px 0 0;
  color: var(--muted);
}

.card {
  padding: 16px;
  background: var(--panel);
}

.card h3 {
  margin-top: 0;
}

.expense-form {
  display: grid;
  grid-template-columns: repeat(3, minmax(150px, 1fr));
  gap: 6px 12px;
}

.filters-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(140px, 1fr));
  gap: 8px 12px;
}

.form-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.form-actions button {
  margin: 8px 0 12px;
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
}

.checkbox-row input {
  width: auto;
  margin: 0;
}

.table-wrap {
  width: 100%;
  overflow: auto;
  contain: layout style;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 1024px;
}

thead th {
  position: sticky;
  top: 0;
  background: #101927;
  z-index: 1;
}

th,
td {
  border-bottom: 1px solid var(--line);
  padding: 10px;
  text-align: left;
  white-space: nowrap;
}

tbody tr:nth-child(even) {
  background: rgba(255, 255, 255, 0.01);
}

tbody tr:hover {
  background: rgba(59, 130, 246, 0.09);
}

td a {
  color: #7fb2ff;
}

.table-action-btn {
  margin: 0 6px 0 0;
  width: auto;
  padding: 6px 10px;
  border-radius: 8px;
  font-size: 0.8rem;
}

.password-field {
  position: relative;
}

.password-field input {
  padding-right: 48px;
}

.icon-btn {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  width: 34px;
  height: 34px;
  margin: 0;
  border-radius: 10px;
  background: transparent;
  border: 1px solid var(--line);
  font-size: 16px;
  line-height: 1;
  padding: 0;
}

.icon-btn:hover {
  background: rgba(255, 255, 255, 0.05);
  transform: translateY(-50%);
}

#login-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.35);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}

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

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media (max-width: 1024px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    height: auto;
  }

  .expense-form {
    grid-template-columns: 1fr;
  }

  .kpi-grid {
    grid-template-columns: repeat(2, minmax(120px, 1fr));
  }

  .filters-grid {
    grid-template-columns: 1fr;
  }
}