:root {
  /* Typography */
  --font-family-display: 'Bebas Neue', sans-serif;
  --font-family-body: 'Roboto', sans-serif;
  --font-size-display-1: 3rem;
  --font-size-display-2: 2.25rem;
  --font-size-body-lg: 1.125rem;
  --font-size-body-md: 1rem;
  --font-size-body-sm: 0.875rem;
  --line-height-display: 1.1;
  --line-height-body: 1.6;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-bold: 700;

  /* Brand and system colors */
  --brand-primary: #1c3564;
  --brand-primary-alt: #2d6fb7;
  --brand-secondary: #cfac4e;
  --brand-accent: #005e73;
  --brand-neutral-900: #081f25;
  --brand-neutral-700: #42495b;
  --brand-neutral-500: #a5a897;
  --brand-neutral-300: #bfb88f;
  --color-bg: #ffffff;
  --color-surface: #ffffff;
  --color-text: var(--brand-neutral-700);
  --color-text-inverse: #ffffff;
  --color-border: #e6e6e6;
  --color-muted: #6b7280;
  --color-primary: var(--brand-primary);
  --color-primary-hover: var(--brand-primary-alt);
  --color-secondary: var(--brand-secondary);
  --color-accent: var(--brand-accent);
  --color-link: var(--brand-primary);
  --color-link-hover: var(--brand-primary-alt);
  --color-danger: #b42318;
  --button-primary-bg: var(--color-primary);
  --button-primary-bg-hover: var(--color-primary-hover);
  --button-primary-border: var(--color-primary);
  --button-primary-border-hover: var(--color-primary-hover);
  --button-primary-text: var(--color-text-inverse);
  --button-secondary-bg: rgba(28, 53, 100, 0.08);
  --button-secondary-bg-hover: var(--color-primary);
  --button-secondary-border: rgba(28, 53, 100, 0.45);
  --button-secondary-border-hover: var(--color-primary);
  --button-secondary-text: var(--color-primary);
  --button-secondary-text-hover: var(--color-text-inverse);
  --color-footer-bg: var(--brand-neutral-900);
  --color-hero-gradient: linear-gradient(135deg, #1c3564 0%, #2d6fb7 100%);
  --color-hero-overlay: rgba(28, 53, 100, 0.75);
  --color-shadow-rgb: 15, 23, 42;

  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-7: 2rem;
  --space-8: 2.5rem;
  --space-9: 3rem;
  --space-10: 4rem;

  /* Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.75rem;
  --radius-pill: 9999px;

  /* Shadow */
  --shadow-sm: 0 1px 2px rgba(var(--color-shadow-rgb), 0.1);
  --shadow-md: 0 4px 12px rgba(var(--color-shadow-rgb), 0.22);
  --shadow-lg: 0 12px 24px rgba(var(--color-shadow-rgb), 0.26);
}

[data-bs-theme='dark'] {
  --color-bg: #0f172a;
  --color-surface: #1e293b;
  --color-text: #e2e8f0;
  --color-text-inverse: #ffffff;
  --color-border: #334155;
  --color-muted: #94a3b8;
  --color-primary: #93c5fd;
  --color-primary-hover: #bfdbfe;
  --color-secondary: #facc15;
  --color-accent: #5eead4;
  --color-link: #93c5fd;
  --color-link-hover: #bfdbfe;
  --color-danger: #fda4af;
  --button-primary-bg: #2563eb;
  --button-primary-bg-hover: #3b82f6;
  --button-primary-border: #2563eb;
  --button-primary-border-hover: #3b82f6;
  --button-primary-text: #eff6ff;
  --button-secondary-bg: rgba(147, 197, 253, 0.16);
  --button-secondary-bg-hover: rgba(147, 197, 253, 0.28);
  --button-secondary-border: rgba(147, 197, 253, 0.55);
  --button-secondary-border-hover: rgba(191, 219, 254, 0.8);
  --button-secondary-text: #dbeafe;
  --button-secondary-text-hover: #f8fafc;
  --color-footer-bg: #020617;
  --color-hero-gradient: linear-gradient(135deg, #0f172a 0%, #1e3a8a 100%);
  --color-hero-overlay: rgba(8, 31, 37, 0.75);
  --color-shadow-rgb: 2, 6, 23;
}

[data-theme='dark'] {
  --color-bg: #0f172a;
  --color-surface: #1e293b;
  --color-text: #e2e8f0;
  --color-text-inverse: #ffffff;
  --color-border: #334155;
  --color-muted: #94a3b8;
  --color-primary: #93c5fd;
  --color-primary-hover: #bfdbfe;
  --color-secondary: #facc15;
  --color-accent: #5eead4;
  --color-link: #93c5fd;
  --color-link-hover: #bfdbfe;
  --color-danger: #fda4af;
  --button-primary-bg: #2563eb;
  --button-primary-bg-hover: #3b82f6;
  --button-primary-border: #2563eb;
  --button-primary-border-hover: #3b82f6;
  --button-primary-text: #eff6ff;
  --button-secondary-bg: rgba(147, 197, 253, 0.16);
  --button-secondary-bg-hover: rgba(147, 197, 253, 0.28);
  --button-secondary-border: rgba(147, 197, 253, 0.55);
  --button-secondary-border-hover: rgba(191, 219, 254, 0.8);
  --button-secondary-text: #dbeafe;
  --button-secondary-text-hover: #f8fafc;
  --color-footer-bg: #020617;
  --color-hero-gradient: linear-gradient(135deg, #0f172a 0%, #1e3a8a 100%);
  --color-hero-overlay: rgba(8, 31, 37, 0.75);
  --color-shadow-rgb: 2, 6, 23;
}

@import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&family=Roboto:wght@400;500;700&display=swap');

html {
  background-color: var(--color-bg);
  color: var(--color-text);
}

body {
  font-family: var(--font-family-body);
  background-color: var(--color-bg);
  color: var(--color-text);
}

/* Shared global form placeholder styling */
input::placeholder {
  color: #6c757d;
  opacity: 1;
}

.fsi-display {
  font-family: var(--font-family-display);
  font-size: var(--font-size-display-1);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-display);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.fsi-section-title {
  font-family: var(--font-family-display);
  font-size: var(--font-size-display-2);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-display);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.fsi-body {
  font-family: var(--font-family-body);
  font-size: var(--font-size-body-md);
  font-weight: var(--font-weight-regular);
  line-height: var(--line-height-body);
  color: var(--color-text);
}

.fsi-body-muted {
  font-family: var(--font-family-body);
  font-size: var(--font-size-body-sm);
  font-weight: var(--font-weight-regular);
  line-height: var(--line-height-body);
  color: var(--color-muted);
}

.fsi-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  border-radius: var(--radius-md);
}

.fsi-button-primary,
.fsi-button-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  font-weight: var(--font-weight-medium);
  line-height: 1.2;
  text-decoration: none;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease,
    box-shadow 0.2s ease;
}

.fsi-button-primary {
  background-color: var(--button-primary-bg);
  border-color: var(--button-primary-border);
  color: var(--button-primary-text);
}

.fsi-button-primary:hover {
  background-color: var(--button-primary-bg-hover);
  border-color: var(--button-primary-border-hover);
  color: var(--button-primary-text);
}

.fsi-button-primary:disabled,
.fsi-button-primary[aria-disabled='true'] {
  background-color: var(--color-border);
  border-color: var(--color-border);
  color: var(--color-muted);
  cursor: not-allowed;
}

.fsi-button-secondary {
  background-color: var(--button-secondary-bg);
  border-color: var(--button-secondary-border);
  color: var(--button-secondary-text);
}

.fsi-button-secondary:hover {
  background-color: var(--button-secondary-bg-hover);
  border-color: var(--button-secondary-border-hover);
  color: var(--button-secondary-text-hover);
}

.fsi-button-secondary:disabled,
.fsi-button-secondary[aria-disabled='true'] {
  border-color: var(--color-border);
  color: var(--color-muted);
  cursor: not-allowed;
}

.fsi-button-primary:focus-visible,
.fsi-button-secondary:focus-visible,
.fsi-navbar__menu a:focus-visible {
  outline: 3px solid var(--color-secondary);
  outline-offset: 2px;
}

.fsi-navbar {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.fsi-navbar__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.fsi-navbar__brand {
  color: var(--color-link);
  font-family: var(--font-family-display);
  letter-spacing: 0.04em;
  text-decoration: none;
  text-transform: uppercase;
}

.fsi-navbar__menu {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
}

.fsi-navbar__menu a {
  color: var(--color-link);
  text-decoration: none;
}

.fsi-navbar__menu a:hover,
.fsi-navbar__menu a:focus {
  color: var(--color-link-hover);
}

.fsi-nav-action {
  --bs-btn-padding-y: 0.2rem;
  --bs-btn-padding-x: 0.55rem;
  --bs-btn-border-radius: var(--radius-sm);
  --bs-btn-font-size: var(--font-size-body-sm);
  --bs-btn-line-height: 1.2;
  --bs-btn-bg: var(--button-secondary-bg);
  --bs-btn-border-color: var(--button-secondary-border);
  --bs-btn-color: var(--button-secondary-text);
  --bs-btn-hover-bg: var(--button-secondary-bg-hover);
  --bs-btn-hover-border-color: var(--button-secondary-border-hover);
  --bs-btn-hover-color: var(--button-secondary-text-hover);
  --bs-btn-focus-shadow-rgb: var(--color-shadow-rgb);
  --bs-btn-active-bg: var(--button-secondary-bg-hover);
  --bs-btn-active-border-color: var(--button-secondary-border-hover);
  --bs-btn-active-color: var(--button-secondary-text-hover);
  min-height: 2rem;
  border-width: 1px;
  white-space: nowrap;
}

.fsi-nav-action.dropdown-toggle::after {
  margin-left: var(--space-2);
}

.fsi-navbar .navbar-collapse {
  overflow: visible;
}

@media (max-width: 991.98px) {
  .fsi-navbar__menu {
    align-items: flex-start;
    flex-direction: column;
    gap: var(--space-2);
    padding-top: var(--space-2);
  }

  .fsi-nav-action {
    justify-content: flex-start;
    width: 100%;
  }

  .fsi-navbar .dropdown-menu.dropdown-menu-end {
    left: 0;
    right: auto;
  }
}

.hero {
  background: var(--color-hero-gradient);
  color: var(--color-text-inverse);
  padding: var(--space-10) var(--space-7);
}

.hero .fsi-display {
  font-size: var(--font-size-display-1);
  line-height: var(--line-height-display);
}

.hero-overlay {
  background: var(--color-hero-overlay);
}

.form-control,
.form-select,
.form-check-input {
  background-color: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border);
}

.form-control:focus,
.form-select:focus,
.form-check-input:focus {
  background-color: var(--color-surface);
  color: var(--color-text);
}

.form-control::placeholder {
  color: var(--color-muted);
  opacity: 0.7;
}

footer {
  background-color: var(--color-footer-bg);
  color: var(--color-text-inverse);
}

.fsi-badge {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: var(--font-size-body-sm);
  padding: 0.2rem 0.55rem;
}

.fsi-badge-success {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.fsi-badge-primary {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.fsi-text-success {
  color: var(--color-accent);
}

.fsi-text-danger {
  color: var(--color-danger);
}

.fsi-navbar .dropdown-toggle {
  color: var(--color-link);
  text-decoration: none;
}

.fsi-navbar .dropdown-toggle:hover,
.fsi-navbar .dropdown-toggle:focus {
  color: var(--color-link-hover);
}

.fsi-navbar .dropdown-menu {
  max-width: min(20rem, calc(100vw - 2rem));
}

.fsi-navbar .dropdown-menu .dropdown-header strong {
  overflow-wrap: anywhere;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
}

.th-hint {
  display: block;
  font-size: 0.75rem;
  font-weight: 400;
  color: #6c757d;
  line-height: 1.4;
  margin-top: 4px;
}

.th-hint i {
  font-size: 0.85rem;
  margin-right: 4px;
  vertical-align: baseline;
}

.expense-lines-table th {
  vertical-align: top;
  min-width: 120px;
}

.expense-lines-table td[data-label='Actions'] {
  min-width: 7.5rem;
}

@media (max-width: 575.98px) {
  .th-hint {
    display: none !important;
  }
}

@media (max-width: 767.98px) {
  .expense-lines-wrapper {
    border: 0;
  }

  .expense-lines-table,
  .expense-lines-table thead,
  .expense-lines-table tbody,
  .expense-lines-table tr,
  .expense-lines-table th,
  .expense-lines-table td {
    display: block;
    width: 100%;
  }

  .expense-lines-table thead {
    display: none;
  }

  .expense-line-row {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-3);
    margin-bottom: var(--space-3);
    background: var(--color-surface);
    box-shadow: var(--shadow-sm);
  }

  .expense-lines-table td {
    border: 0;
    padding: var(--space-2) 0;
  }

  .expense-lines-table td::before {
    content: attr(data-label);
    display: block;
    font-size: var(--font-size-body-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-muted);
    margin-bottom: var(--space-1);
  }

  .expense-lines-table .form-control,
  .expense-lines-table .remove-line-btn,
  #add-line-btn,
  #expense-form [name='submit_action'] {
    width: 100%;
  }
}