:root {
  /* YouTube-style typography: Roboto at a slightly denser scale */
  --tpc-font-sans: "Roboto", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --tpc-font-heading: "Roboto", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --tpc-radius-sm: 0.5rem;
  --tpc-radius-md: 0.75rem;
  --tpc-radius-lg: 0.75rem;
  --tpc-radius-pill: 999px;
  --tpc-space-1: 0.25rem;
  --tpc-space-2: 0.5rem;
  --tpc-space-3: 0.75rem;
  --tpc-space-4: 1rem;
  --tpc-space-5: 1.25rem;
  --tpc-space-6: 1.5rem;
  --tpc-space-8: 2rem;
  /* Flat, YouTube-like surfaces: borders carry the structure, not shadows */
  --tpc-shadow-soft: none;
  --tpc-shadow-tight: none;
  --tpc-ease-standard: cubic-bezier(0.23, 1, 0.32, 1);
  --tpc-transition: 190ms var(--tpc-ease-standard);
  --tpc-fixed-footer-space: 6.6rem;

  /* Default (light) palette — matches YouTube light mode.
     Theme blocks below override. */
  --tpc-bg: #ffffff;
  --tpc-bg-elevated: #ffffff;
  --tpc-surface: #f2f2f2;
  --tpc-surface-strong: #ffffff;
  --tpc-border: #e5e5e5;
  --tpc-border-strong: #d3d3d3;
  --tpc-text: #0f0f0f;
  --tpc-text-soft: #3f3f3f;
  --tpc-text-muted: #606060;
  --tpc-accent: #b18a36;
  --tpc-accent-strong: #8f6f26;
  --tpc-accent-contrast: #ffffff;
  --tpc-button-primary-bg: #181818;
  --tpc-button-primary-hover: #2a2a2a;
  --tpc-button-primary-text: #ffffff;
  --tpc-danger: #cc0000;
  --tpc-success: #1e8e3e;
  --tpc-info: #065fd4;
  --tpc-warning: #b06000;
  --tpc-navbar-bg: #ffffff;
  --tpc-focus: rgba(177, 138, 54, 0.28);
}

/* YouTube-like scale: slightly denser rem base so all components shrink together */
html {
  font-size: 15px;
}

html,
body {
  min-height: 100%;
}

/* YouTube light mode */
html[data-theme="light"] {
  --tpc-bg: #ffffff;
  --tpc-bg-elevated: #ffffff;
  --tpc-surface: #f2f2f2;
  --tpc-surface-strong: #ffffff;
  --tpc-border: #e5e5e5;
  --tpc-border-strong: #d3d3d3;
  --tpc-text: #0f0f0f;
  --tpc-text-soft: #3f3f3f;
  --tpc-text-muted: #606060;
  --tpc-accent: #b18a36;
  --tpc-accent-strong: #8f6f26;
  --tpc-accent-contrast: #ffffff;
  --tpc-button-primary-bg: #181818;
  --tpc-button-primary-hover: #2a2a2a;
  --tpc-button-primary-text: #ffffff;
  --tpc-danger: #cc0000;
  --tpc-success: #1e8e3e;
  --tpc-info: #065fd4;
  --tpc-warning: #b06000;
  --tpc-navbar-bg: #ffffff;
  --tpc-focus: rgba(177, 138, 54, 0.28);
}

/* YouTube dark mode */
html[data-theme="dark"] {
  --tpc-bg: #0f0f0f;
  --tpc-bg-elevated: #212121;
  --tpc-surface: #212121;
  --tpc-surface-strong: #282828;
  --tpc-border: #3f3f3f;
  --tpc-border-strong: #535353;
  --tpc-text: #f1f1f1;
  --tpc-text-soft: #cccccc;
  --tpc-text-muted: #aaaaaa;
  --tpc-accent: #d6ad52;
  --tpc-accent-strong: #e3c477;
  --tpc-accent-contrast: #17120a;
  --tpc-button-primary-bg: var(--tpc-accent);
  --tpc-button-primary-hover: var(--tpc-accent-strong);
  --tpc-button-primary-text: #17120a;
  --tpc-danger: #ff4e45;
  --tpc-success: #66bb6a;
  --tpc-info: #3ea6ff;
  --tpc-warning: #ffa726;
  --tpc-navbar-bg: #0f0f0f;
  --tpc-focus: rgba(214, 173, 82, 0.35);
}

html[data-theme="fun"] {
  --tpc-bg: #fff8e8;
  --tpc-bg-elevated: rgba(255, 249, 234, 0.84);
  --tpc-surface: #ffffff;
  --tpc-surface-strong: #fffdf8;
  --tpc-border: #d6d9d2;
  --tpc-border-strong: #c0c8bd;
  --tpc-text: #20352a;
  --tpc-text-soft: #426353;
  --tpc-text-muted: #668274;
  --tpc-accent: #a77825;
  --tpc-accent-strong: #835d1b;
  --tpc-accent-contrast: #ffffff;
  --tpc-button-primary-bg: #1b1a18;
  --tpc-button-primary-hover: #2c2a26;
  --tpc-button-primary-text: #ffffff;
  --tpc-danger: #cd4f44;
  --tpc-success: #0b8b63;
  --tpc-info: #2b78a5;
  --tpc-warning: #b0721d;
  --tpc-navbar-bg: rgba(255, 248, 232, 0.9);
  --tpc-focus: rgba(167, 120, 37, 0.28);
}

/* Flat page background, like YouTube */
body#TPC {
  position: relative;
  margin: 0;
  font-family: var(--tpc-font-sans);
  line-height: 1.5;
  color: var(--tpc-text);
  background: var(--tpc-bg);
}

body#TPC.tpc-fixed-footer-page {
  padding-bottom: var(--tpc-fixed-footer-space);
}

html[data-theme="fun"] body#TPC {
  background:
    radial-gradient(circle at 10% 0%, rgba(255, 186, 131, 0.25), transparent 38%),
    radial-gradient(circle at 93% 4%, rgba(123, 219, 184, 0.25), transparent 34%),
    linear-gradient(180deg, #fff8e8 0%, #f8f3e4 100%);
}

main,
#main-wrapper {
  width: min(1160px, calc(100% - 2rem));
  margin: 1.35rem auto 0;
}

#pagedescription {
  margin: 1rem 0 1.5rem;
  font-size: 0.79rem;
  letter-spacing: 0;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--tpc-text-muted);
}

a {
  color: var(--tpc-accent);
  text-decoration: none;
  transition: color var(--tpc-transition);
}

a:hover,
a:focus-visible {
  color: var(--tpc-accent-strong);
}

/* Keep Bootstrap's blue link/text utilities on the theme accent */
.text-primary {
  color: var(--tpc-accent) !important;
}

.btn-link {
  color: var(--tpc-accent);
}

.btn-link:hover,
.btn-link:focus-visible {
  color: var(--tpc-accent-strong);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0 0 0.45em;
  color: var(--tpc-text);
  font-family: var(--tpc-font-heading);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: 0;
}

h1,
.h1 {
  font-size: clamp(1.72rem, 2.7vw, 2.44rem);
}

h2,
.h2 {
  font-size: clamp(1.35rem, 2.1vw, 1.84rem);
}

h3,
.h3 {
  font-size: clamp(1.15rem, 1.7vw, 1.44rem);
}

h4,
.h4,
h5,
.h5 {
  font-size: 1.05rem;
}

p,
small,
.text-muted {
  color: var(--tpc-text-soft) !important;
}

.sparrow-navbar {
  position: sticky;
  top: 0;
  z-index: 1050;
  background: var(--tpc-navbar-bg);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid color-mix(in oklab, var(--tpc-border), transparent 28%);
}

.tpc-navbar-container {
  max-width: 1200px;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--tpc-text);
}

.navbar-brand:hover,
.navbar-brand:focus-visible {
  color: var(--tpc-accent);
}

.navbar-brand-text {
  font-weight: 670;
  letter-spacing: 0;
}

.navbar-logo {
  display: block;
}

.navbar-logo-dark {
  display: none;
}

html[data-theme="dark"] .navbar-logo-light {
  display: none;
}

html[data-theme="dark"] .navbar-logo-dark {
  display: block;
}

.navbar-toggler {
  border-color: color-mix(in oklab, var(--tpc-border), transparent 30%);
}

.navbar-toggler:focus {
  box-shadow: 0 0 0 0.2rem var(--tpc-focus);
}

.navbar-nav {
  align-items: center;
  gap: var(--tpc-space-3);
}

.navbar-nav .nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.5rem;
  color: var(--tpc-text-soft);
  font-weight: 590;
  letter-spacing: 0;
  border-bottom: 0;
  border-radius: var(--tpc-radius-sm);
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link:focus-visible {
  color: var(--tpc-text);
  background: color-mix(in oklab, var(--tpc-surface), transparent 4%);
}

.nav-item.active .nav-link,
.navbar-nav .nav-link[aria-current="page"] {
  color: var(--tpc-accent);
  background: color-mix(in oklab, var(--tpc-accent), transparent 88%);
}

.tpc-icon-xs {
  font-size: 0.9rem;
  line-height: 1;
}

.nav-theme-switcher {
  display: flex;
  align-items: center;
  margin-left: 0.65rem;
}

.theme-toggle {
  display: inline-flex;
  gap: 0.15rem;
  padding: 0.18rem;
  border-radius: var(--tpc-radius-pill);
  border: 1px solid var(--tpc-border);
  background: color-mix(in oklab, var(--tpc-surface), transparent 10%);
}

.theme-toggle-btn {
  padding: 0.33rem 0.7rem;
  border: 0;
  border-radius: var(--tpc-radius-pill);
  background: transparent;
  color: var(--tpc-text-soft);
  font-size: 0.78rem;
  font-weight: 650;
  letter-spacing: 0;
  transition: all var(--tpc-transition);
}

.theme-toggle-icon-btn {
  display: inline-flex;
  width: 2rem;
  height: 2rem;
  justify-content: center;
  align-items: center;
  padding: 0;
  font-size: 0.96rem;
}

.theme-toggle-btn:hover,
.theme-toggle-btn:focus-visible {
  color: var(--tpc-text);
  outline: none;
}

.theme-toggle-btn.is-active {
  background: var(--tpc-accent);
  color: var(--tpc-accent-contrast);
  box-shadow: var(--tpc-shadow-tight);
}

.settings-theme-toggle {
  display: inline-flex;
}

.btn,
.btn-modern {
  border-radius: var(--tpc-radius-pill);
  border: 1px solid transparent;
  font-weight: 650;
  letter-spacing: 0;
  padding: 0.56rem 1rem;
  transition: transform var(--tpc-transition), background-color var(--tpc-transition),
    border-color var(--tpc-transition), box-shadow var(--tpc-transition), color var(--tpc-transition);
}

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

.btn:focus-visible,
.btn-modern:focus-visible,
.form-control:focus,
.form-select:focus,
.input-modern:focus {
  outline: none;
  box-shadow: 0 0 0 0.2rem var(--tpc-focus);
}

.btn-primary,
.btn-modern-primary {
  background: var(--tpc-button-primary-bg);
  border-color: var(--tpc-button-primary-bg);
  color: var(--tpc-button-primary-text);
}

.btn-primary:hover,
.btn-modern-primary:hover,
.btn-primary:focus-visible,
.btn-modern-primary:focus-visible {
  background: var(--tpc-button-primary-hover);
  border-color: var(--tpc-button-primary-hover);
  color: var(--tpc-button-primary-text);
}

.btn-secondary,
.btn-modern-secondary {
  background: transparent;
  border-color: var(--tpc-border-strong);
  color: var(--tpc-text);
}

.btn-secondary:hover,
.btn-modern-secondary:hover,
.btn-outline-secondary:hover {
  background: color-mix(in oklab, var(--tpc-surface), var(--tpc-accent) 10%);
  color: var(--tpc-text);
  border-color: var(--tpc-accent);
}

.btn-danger,
.btn-modern-destructive {
  background: color-mix(in oklab, var(--tpc-danger), black 6%);
  border-color: color-mix(in oklab, var(--tpc-danger), black 6%);
  color: #fff;
}

.btn-outline-primary {
  border-color: var(--tpc-accent);
  color: var(--tpc-accent);
}

.btn-outline-primary:hover,
.btn-outline-primary:focus-visible {
  border-color: var(--tpc-accent);
  background: var(--tpc-accent);
  color: var(--tpc-accent-contrast);
}

.btn-outline-danger {
  border-color: var(--tpc-danger);
  color: var(--tpc-danger);
}

.btn-outline-danger:hover {
  background: var(--tpc-danger);
  color: #fff;
}

.btn-modern-sm,
.btn-sm {
  padding: 0.36rem 0.78rem;
  font-size: 0.84rem;
}

.btn-block {
  width: 100%;
}

.card,
.card-modern {
  border: 1px solid var(--tpc-border);
  border-radius: var(--tpc-radius-lg);
  background: color-mix(in oklab, var(--tpc-surface-strong), transparent 4%);
  box-shadow: var(--tpc-shadow-soft);
}

/* Inner padding for the modern card/panel surfaces (auth, settings, etc.).
   .card uses Bootstrap's .card-body for padding, so scope this to .card-modern. */
.card-modern {
  padding: 1.25rem;
}

.card-body,
.card-header,
.card-footer {
  border-color: color-mix(in oklab, var(--tpc-border), transparent 34%);
  background: transparent;
}

.card-header {
  font-weight: 650;
}

.card-default {
  background: color-mix(in oklab, var(--tpc-surface), white 14%);
}

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

.form-label-modern,
label {
  margin-bottom: 0.4rem;
  font-weight: 610;
  color: var(--tpc-text-soft);
}

.form-control,
.form-select,
.input-modern,
select.form-control,
textarea.form-control {
  border: 1px solid var(--tpc-border-strong);
  border-radius: var(--tpc-radius-sm);
  background: color-mix(in oklab, var(--tpc-surface), white 6%);
  color: var(--tpc-text);
  min-height: 42px;
}

textarea.form-control {
  min-height: 120px;
}

.form-control::placeholder,
.input-modern::placeholder,
textarea.form-control::placeholder {
  color: var(--tpc-text-muted);
  opacity: 0.9;
}

.invalid-feedback {
  color: var(--tpc-danger);
}

.progress {
  background: color-mix(in oklab, var(--tpc-surface), black 8%);
}

.progress-bar {
  background: var(--tpc-accent);
}

.badge,
.badge-sm {
  font-weight: 620;
}

.bg-primary {
  background-color: var(--tpc-accent) !important;
}

.bg-success {
  background-color: var(--tpc-success) !important;
}

.bg-warning {
  background-color: color-mix(in oklab, var(--tpc-warning), white 12%) !important;
}

.bg-info {
  background-color: var(--tpc-info) !important;
}

.bg-danger {
  background-color: var(--tpc-danger) !important;
}

.badge-secondary,
.bg-secondary,
.btn-outline-secondary {
  border-color: var(--tpc-border-strong);
}

.table,
#scenario_list {
  width: 100%;
  margin-bottom: 1rem;
  border-radius: var(--tpc-radius-lg);
  overflow: hidden;
  background: var(--tpc-surface-strong);
  border: 1px solid var(--tpc-border);
}

.table > :not(caption) > * > *,
#scenario_list th,
#scenario_list td {
  padding: 0.8rem 0.92rem;
  border-bottom-color: color-mix(in oklab, var(--tpc-border), transparent 40%);
  color: var(--tpc-text);
}

.table thead th,
#scenario_list thead th {
  border-bottom-width: 1px;
  font-size: 0.8rem;
  letter-spacing: 0;
  text-transform: uppercase;
  color: var(--tpc-text-muted);
}

.table-striped > tbody > tr:nth-of-type(odd),
#scenario_list tbody tr:nth-child(odd) {
  background: color-mix(in oklab, var(--tpc-surface), transparent 18%);
}

.table-hover tbody tr:hover,
#scenario_list tbody tr:hover {
  background: color-mix(in oklab, var(--tpc-surface), var(--tpc-accent) 10%);
}

#scenario_list .scenario_name_link {
  color: var(--tpc-text) !important;
  font-weight: 560;
  text-decoration: none;
}

#scenario_list .scenario_name_link:hover,
#scenario_list .scenario_name_link:focus-visible {
  color: var(--tpc-accent) !important;
}

#scenario_list .scenario_controls,
#scenario_list .scenario_reports {
  white-space: nowrap;
}

#scenario_list .scenario_action_list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  gap: 0.72rem;
}

#scenario_list .scenario_action_list li {
  margin: 0;
  padding: 0;
}

#scenario_list .scenario_action_list a {
  display: inline-flex;
  align-items: center;
  gap: 0.26rem;
  color: var(--tpc-accent);
  text-decoration: none;
  font-weight: 560;
}

#scenario_list .scenario_action_list a:hover,
#scenario_list .scenario_action_list a:focus-visible {
  color: var(--tpc-accent-strong);
}

#scenario_list .tpc-action-icon {
  font-size: 0.92rem;
}

.tip {
  margin-top: 1.25rem;
  padding: 1rem 1.1rem;
  border: 1px solid color-mix(in oklab, var(--tpc-border), transparent 26%);
  border-radius: var(--tpc-radius-md);
  background: color-mix(in oklab, var(--tpc-surface), white 8%);
}

.scenario-options {
  width: min(1160px, calc(100% - 2rem));
  /* bottom margin matches the money strip's margin-bottom (the gap before the
     Add New Item button) so spacing is consistent above and below the panels */
  margin: 1rem auto 1.1rem;
}

.scenario-options-list {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 0.45rem;
}

.scenario-option-link {
  display: inline-flex;
  align-items: center;
  gap: 0.42rem;
  padding: 0.45rem 0.78rem;
  border-radius: var(--tpc-radius-pill);
  border: 1px solid var(--tpc-border);
  background: color-mix(in oklab, var(--tpc-surface), transparent 8%);
  color: var(--tpc-text-soft);
  text-decoration: none;
}

.scenario-option-item.active .scenario-option-link,
.scenario-option-link:hover,
.scenario-option-link:focus-visible {
  border-color: var(--tpc-accent);
  color: var(--tpc-accent);
}

#footer-wrapper {
  position: fixed;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 1020;
  margin-top: 0;
  border-top: 1px solid color-mix(in oklab, var(--tpc-border), transparent 20%);
  background: color-mix(in oklab, var(--tpc-surface), transparent 12%);
  backdrop-filter: blur(14px);
}

#footer-wrapper .container {
  max-width: 1160px;
  padding-top: 1.15rem;
  padding-bottom: 1.2rem;
}

.site-terms {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1rem;
  align-items: center;
}

.site-item,
.site-item .link,
.copyright-sparrow {
  color: var(--tpc-text-muted);
  font-size: 0.86rem;
}

.jsnotice {
  max-width: 800px;
  margin: 1rem auto;
  padding: 0.9rem;
  border-radius: var(--tpc-radius-sm);
  border: 1px solid var(--tpc-danger);
  color: var(--tpc-danger);
  background: color-mix(in oklab, var(--tpc-danger), white 88%);
}

#stdform,
#settingspage {
  width: min(960px, calc(100% - 2rem));
  margin: 0 auto;
}

.custom-control {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.dropdown-menu {
  border: 1px solid var(--tpc-border);
  background: var(--tpc-surface-strong);
  color: var(--tpc-text);
  border-radius: var(--tpc-radius-md);
}

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

.dropdown-item:hover,
.dropdown-item:focus-visible {
  color: var(--tpc-text);
  background: color-mix(in oklab, var(--tpc-surface), var(--tpc-accent) 10%);
}

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

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

body.tpc-theme-ready #main-wrapper {
  animation: tpcFadeRise 320ms ease-out;
}

@media (max-width: 991.98px) {
  .navbar-nav {
    align-items: flex-start;
    gap: 0.5rem;
    padding-top: 0.8rem;
  }

  .theme-toggle {
    margin-top: 0.4rem;
  }

  .nav-theme-switcher {
    margin-left: 0;
  }

  #main-wrapper,
  .scenario-options,
  #footer-wrapper .container,
  #stdform,
  #settingspage {
    width: calc(100% - 1.2rem);
  }

  body#TPC.tpc-fixed-footer-page {
    --tpc-fixed-footer-space: 8.4rem;
  }
}

@media (max-width: 767.98px) {
  body#TPC::before {
    background-size: 24px 24px;
    opacity: 0.2;
  }

  h1,
  .h1 {
    font-size: 1.55rem;
  }

  #pagedescription {
    margin-bottom: 1.05rem;
  }

  .table,
  #scenario_list {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }

  .site-terms {
    gap: 0.45rem 0.8rem;
  }
}