:root {
  --font-sans: "Segoe UI", "Poppins", "Nunito Sans", sans-serif;
  --bg: #ffffff;
  --text: #1a1a1a;
  --card: #ffffff;
  --text-color: #1a1a1a;
  --card-bg: #ffffff;
  --border: rgba(128, 150, 185, 0.4);
  --bg-main: #f4f8ff;
  --bg-grad-1: #dff3ff;
  --bg-grad-2: #f6eefc;
  --text-main: #13223a;
  --text-muted: #5a6a84;
  --surface: rgba(255, 255, 255, 0.78);
  --surface-solid: #ffffff;
  --surface-border: rgba(255, 255, 255, 0.58);
  --brand-1: #0d6efd;
  --brand-2: #00a6fb;
  --success: #198754;
  --danger: #dc3545;
  --shadow-soft: 0 12px 30px rgba(18, 38, 63, 0.12);
  --radius-lg: 1.1rem;
  --radius-md: 0.85rem;
  --radius-sm: 0.65rem;
  --control-height: 42px;
}

[data-theme="dark"] {
  --bg: #0f172a;
  --text: #e5e7eb;
  --card: #1e293b;
  --text-color: #e5e7eb;
  --card-bg: #1e293b;
  --border: rgba(151, 179, 225, 0.35);
  --bg-main: #0f1726;
  --bg-grad-1: #12203a;
  --bg-grad-2: #1d1731;
  --text-main: #eaf1ff;
  --text-muted: #a4b2cd;
  --surface: rgba(23, 33, 54, 0.75);
  --surface-solid: #1a2742;
  --surface-border: rgba(151, 179, 225, 0.25);
  --brand-1: #66a8ff;
  --brand-2: #43d3ff;
  --shadow-soft: 0 14px 35px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html,
body {
  transition: background-color 0.25s ease, color 0.25s ease;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text-color);
  position: relative;
}

.card,
.modal,
.table {
  background: var(--card-bg);
  color: var(--text-color);
}

h1, h2, h3, h4, h5, h6, p, label, th, td, span, li, a {
  color: inherit;
}

.auth-shell {
  min-height: calc(100vh - 8.5rem);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.9rem;
}

.auth-card-wrap {
  max-width: 420px;
  margin-inline: auto;
}

.landing-card {
  max-width: 720px;
  margin-inline: auto;
}

.feature-chip {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.62rem 0.75rem;
  background: var(--card);
  font-weight: 600;
  font-size: 0.92rem;
}

.feature-chip i {
  margin-right: 0.4rem;
  color: var(--brand-1);
}

.auth-card {
  border-radius: 1.2rem;
  box-shadow: 0 16px 36px rgba(16, 39, 70, 0.18);
}

.auth-card .nav-pills .nav-link {
  min-height: 42px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.auth-card .tab-pane {
  min-height: 252px;
}

.auth-card .form-label {
  margin-bottom: 0.45rem;
  font-size: 0.92rem;
}

.auth-card .form-control {
  min-height: 43px;
}

.app-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 12% 12%, var(--bg-grad-1), transparent 42%),
    radial-gradient(circle at 86% 20%, var(--bg-grad-2), transparent 45%),
    linear-gradient(145deg, rgba(255, 255, 255, 0.38), rgba(255, 255, 255, 0));
}

.glass-card {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(10px);
  animation: card-in 0.35s ease both;
}

@keyframes card-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.brand-navbar {
  background: linear-gradient(120deg, var(--brand-1), var(--brand-2));
  border: 1px solid rgba(255, 255, 255, 0.35);
  min-height: 68px;
}

.brand-navbar .navbar-brand {
  line-height: 1;
}

.brand-navbar .btn-sm {
  min-height: 36px;
  display: inline-flex;
  align-items: center;
}

.brand-navbar .btn-outline-light {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.75);
}

.brand-navbar .btn-outline-light:hover,
.brand-navbar .btn-outline-light:focus-visible {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
}

.shadow-soft {
  box-shadow: var(--shadow-soft);
}

.btn-brand {
  border: none;
  border-radius: 999px;
  background: linear-gradient(120deg, var(--brand-1), var(--brand-2));
  color: #fff;
  transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
}

.btn-brand:hover,
.btn-brand:focus-visible {
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 10px 20px rgba(13, 110, 253, 0.25);
}

.btn {
  border-radius: 999px;
  transition: transform 0.22s ease, box-shadow 0.22s ease, background-color 0.22s ease, color 0.22s ease;
  min-height: var(--control-height);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-1px);
}

.form-control,
.form-select {
  min-height: var(--control-height);
  border-radius: var(--radius-sm);
  border-color: var(--border);
  background: var(--card);
  color: var(--text-color);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.form-control:focus,
.form-select:focus {
  border-color: var(--brand-1);
  box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.2);
}

.form-label,
.text-muted,
.small {
  color: var(--text-muted) !important;
}

.nav-tabs .nav-link {
  color: var(--text-color);
  border-radius: var(--radius-md);
  border: none;
  margin-right: 0.35rem;
  min-height: var(--control-height);
  display: inline-flex;
  align-items: center;
}

.nav-tabs .nav-link.active {
  color: #fff;
  background: linear-gradient(120deg, var(--brand-1), var(--brand-2));
}

.metric-card {
  transition: transform 0.2s ease;
  height: 100%;
}

.metric-card:hover {
  transform: translateY(-2px);
}

.calendar-weekdays,
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 0.45rem;
}

.calendar-weekdays div {
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 600;
}

.calendar-day {
  min-height: 78px;
  border: 1px solid rgba(133, 157, 192, 0.3);
  border-radius: var(--radius-sm);
  background: var(--card);
  padding: 0.35rem;
  position: relative;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.calendar-day:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(20, 46, 84, 0.12);
}

.calendar-day.empty {
  pointer-events: none;
  opacity: 0;
}

.calendar-day .day-num {
  font-size: 0.84rem;
  font-weight: 600;
}

.calendar-day .day-amt {
  font-size: 0.72rem;
  margin-top: 0.4rem;
  color: var(--danger);
}

.calendar-day.has-expense::after {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #ff6a88;
  position: absolute;
  top: 8px;
  right: 8px;
}

.table {
  color: var(--text-color);
}

.table > :not(caption) > * > * {
  background-color: transparent;
  border-color: rgba(123, 147, 184, 0.25);
}

.table thead th {
  position: sticky;
  top: 0;
  z-index: 1;
  background: var(--card);
}

.modal-content {
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  background: var(--card-bg);
  color: var(--text-color);
  animation: modal-in 0.22s ease;
}

.modal-backdrop {
  background: rgba(0, 0, 0, 0.5);
}

.modal-header,
.modal-footer {
  border-color: rgba(128, 150, 185, 0.25);
}

.modal-body .mb-3 {
  margin-bottom: 0.95rem !important;
}

.modal-body .form-control,
.modal-body .form-select,
.modal-body textarea {
  width: 100%;
}

.modal-footer {
  gap: 0.45rem;
  justify-content: flex-end;
}

.dropdown-menu {
  border-radius: var(--radius-md);
  border-color: var(--border);
  background: var(--card);
  color: var(--text-color);
}

.dropdown-item {
  color: var(--text-color);
}

.dropdown-item:hover,
.dropdown-item:focus {
  background: rgba(13, 110, 253, 0.1);
  color: var(--text-color);
}

.table-responsive,
.table thead th,
.table tbody td {
  background: transparent;
}

[data-theme="dark"] .table-striped > tbody > tr:nth-of-type(odd) > * {
  color: var(--text-color);
}

[data-theme="dark"] .form-control,
[data-theme="dark"] .form-select,
[data-theme="dark"] .form-label,
[data-theme="dark"] .table,
[data-theme="dark"] .table thead th,
[data-theme="dark"] .table tbody td,
[data-theme="dark"] .modal-title,
[data-theme="dark"] .modal-body,
[data-theme="dark"] .modal-footer,
[data-theme="dark"] .nav-tabs .nav-link,
[data-theme="dark"] .dropdown-item,
[data-theme="dark"] a {
  color: var(--text) !important;
}

[data-theme="dark"] .form-control::placeholder,
[data-theme="dark"] textarea::placeholder,
[data-theme="dark"] input::placeholder {
  color: var(--text-muted);
}

[data-theme="dark"] .btn-outline-primary,
[data-theme="dark"] .btn-outline-success,
[data-theme="dark"] .btn-outline-secondary,
[data-theme="dark"] .btn-outline-light {
  color: var(--text-color);
  border-color: rgba(151, 179, 225, 0.55);
}

[data-theme="dark"] .btn-close {
  filter: invert(1);
}

[data-theme="dark"] .calendar-day {
  border-color: rgba(151, 179, 225, 0.35);
}

[data-theme="dark"] .brand-navbar .navbar-brand,
[data-theme="dark"] #welcomeText {
  color: #f4f8ff !important;
}

[data-theme="dark"] .navbar,
[data-theme="dark"] .navbar * {
  color: var(--text) !important;
}

.navbar,
.navbar * {
  color: var(--text) !important;
}

[data-theme="dark"] .brand-navbar .btn-outline-light,
[data-theme="dark"] .brand-navbar .btn-outline-light i {
  color: var(--text) !important;
  border-color: rgba(229, 231, 235, 0.7);
}

[data-theme="dark"] .brand-navbar .dropdown-menu {
  background: #1b2a47;
}

.landing-hero .lead {
  max-width: 600px;
}

.developer-photo {
  width: 220px;
  height: 220px;
  border-radius: 1rem;
  object-fit: cover;
  border: 2px solid var(--border);
  box-shadow: var(--shadow-soft);
}

@keyframes modal-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

footer {
  color: var(--text-muted);
}

.negative-amt {
  color: var(--danger);
}

.chart-empty {
  font-size: 0.9rem;
  color: var(--text-muted);
  text-align: center;
  padding: 1rem 0;
}

@media (max-width: 575.98px) {
  main.container {
    padding-left: 0.85rem;
    padding-right: 0.85rem;
  }

  .auth-shell {
    min-height: calc(100vh - 5.5rem);
  }

  .landing-card {
    margin-bottom: 0.75rem !important;
  }

  .developer-photo {
    width: 180px;
    height: 180px;
  }

  .calendar-day {
    min-height: 64px;
  }

  .calendar-day .day-amt {
    display: none;
  }

  .auth-shell .glass-card {
    padding: 1.1rem !important;
  }

  .auth-card .tab-pane {
    min-height: 0;
  }
}

@media (min-width: 992px) {
  main.container {
    max-width: 1120px;
  }
}