:root {
  color-scheme: light;
  font-family: ui-sans-serif, system-ui, sans-serif;
  background: var(--canvas);
  color: var(--ink);
  --canvas: #f5f2e9;
  --ink: #20342f;
  --paper: #fffdf8;
  --line: #d9d4c6;
  --line-soft: #e8e3d8;
  --red: #9d3428;
  --red-strong: #6e211b;
  --on-red: #ffffff;
  --blue: #285a70;
  --muted: #68756f;
  --soft: #eef5f1;
  --control: #ffffff;
  --control-line: #aaa598;
  --hover: #f3eee1;
  --focus: #d7aa51;
  --positive: #286241;
  --warning: #76520c;
  --danger: #8a2d25;
  --header: #fffdf8ed;
  --shadow: #20342f30;
  --shadow-soft: #20342f24;
  --card-shadow: #3c352518;
  --notice-line: #b9c9c3;
  --toast-line: #cfbda3;
  --toast: #fff8dc;
  --error-line: #cf8e87;
  --error-surface: #fff0ee;
  --warning-line: #e8c779;
  --warning-surface: #fff3d9;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --canvas: #111815;
  --ink: #edf4ef;
  --paper: #18221e;
  --line: #3c4a44;
  --line-soft: #2d3934;
  --red: #f08a7c;
  --red-strong: #ffafa4;
  --on-red: #17110f;
  --blue: #80bad2;
  --muted: #a8b7b0;
  --soft: #20332b;
  --control: #121a17;
  --control-line: #56645e;
  --hover: #27332e;
  --focus: #e5b85d;
  --positive: #7fd3a1;
  --warning: #e7c16c;
  --danger: #ff9a8e;
  --header: #18221eed;
  --shadow: #00000066;
  --shadow-soft: #0000004d;
  --card-shadow: #00000052;
  --notice-line: #466056;
  --toast-line: #746842;
  --toast: #332e1e;
  --error-line: #82514b;
  --error-surface: #382321;
  --warning-line: #806d3e;
  --warning-surface: #342d1c;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    color-scheme: dark;
    --canvas: #111815;
    --ink: #edf4ef;
    --paper: #18221e;
    --line: #3c4a44;
    --line-soft: #2d3934;
    --red: #f08a7c;
    --red-strong: #ffafa4;
    --on-red: #17110f;
    --blue: #80bad2;
    --muted: #a8b7b0;
    --soft: #20332b;
    --control: #121a17;
    --control-line: #56645e;
    --hover: #27332e;
    --focus: #e5b85d;
    --positive: #7fd3a1;
    --warning: #e7c16c;
    --danger: #ff9a8e;
    --header: #18221eed;
    --shadow: #00000066;
    --shadow-soft: #0000004d;
    --card-shadow: #00000052;
    --notice-line: #466056;
    --toast-line: #746842;
    --toast: #332e1e;
    --error-line: #82514b;
    --error-surface: #382321;
    --warning-line: #806d3e;
    --warning-surface: #342d1c;
  }
}

* { box-sizing: border-box; }

/* Overlay-style scrollbars keep scrollable app surfaces visually light while
   preserving a usable native scrollbar in Firefox and WebKit browsers. */
* {
  scrollbar-width: thin;
  scrollbar-color: color-mix(in srgb, var(--ink) 28%, transparent) transparent;
}
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  border: 3px solid transparent;
  border-radius: 9999px;
  background-clip: padding-box;
  background-color: color-mix(in srgb, var(--ink) 28%, transparent);
}
::-webkit-scrollbar-thumb:hover {
  background-color: color-mix(in srgb, var(--ink) 45%, transparent);
}
::-webkit-scrollbar-corner { background: transparent; }

body { min-height: 100vh; margin: 0; }
a { color: var(--red); text-underline-offset: .2em; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: .5rem; letter-spacing: -.035em; }
h2 { font-size: 1.05rem; }
h3 { font-size: 1rem; }
p, li { line-height: 1.5; }

.skip-link {
  position: fixed;
  z-index: 60;
  top: -5rem;
  left: 1rem;
  padding: .75rem 1rem;
  border-radius: .3rem;
  background: var(--paper);
  color: var(--ink);
}
.skip-link:focus { top: 1rem; }

main:not(.app-main) { max-width: 46rem; margin: 8vh auto; padding: 2rem; }
form { display: grid; gap: .8rem; }
label { display: grid; gap: .35rem; font-weight: 650; }
input, select, textarea, button, .button {
  min-height: 2.75rem;
  padding: .68rem .8rem;
  border-radius: .3rem;
  font: inherit;
}
input, select, textarea {
  width: 100%;
  min-width: 0;
  border: 1px solid var(--control-line);
  background: var(--control);
  color: var(--ink);
}
input[type="checkbox"], input[type="radio"] {
  flex: 0 0 auto;
  width: 1.25rem;
  height: 1.25rem;
  min-height: 0;
  padding: 0;
  accent-color: var(--red);
}
textarea { min-height: 5rem; resize: vertical; }
button, .button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--red);
  background: var(--red);
  color: var(--on-red);
  font-weight: 700;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
}
button:hover, .button:hover { border-color: var(--red-strong); background: var(--red-strong); }
.button-secondary, .button.secondary, button.secondary {
  border-color: var(--red);
  background: transparent;
  color: var(--red);
}
.button-secondary:hover, .button.secondary:hover, button.secondary:hover {
  background: var(--hover);
  color: var(--red-strong);
}
.button-danger, button.danger { border-color: var(--red-strong); background: var(--red-strong); }
.button-link { min-height: 0; padding: 0; gap: .35rem; border: 0; background: transparent; color: var(--red); }
.button-link:hover { border: 0; background: transparent; color: var(--red-strong); }
button:focus-visible, .button:focus-visible, input:focus-visible, select:focus-visible,
textarea:focus-visible, summary:focus-visible, a:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.eyebrow, .label {
  display: block;
  margin-bottom: .45rem;
  color: var(--muted);
  font-size: .74rem;
  font-weight: 800;
  letter-spacing: .09em;
  text-transform: uppercase;
}
.hint, small { display: block; color: var(--muted); font-size: .84rem; }
.muted { color: var(--muted); }
.empty { padding: 1rem 0; color: var(--muted); }

.biab-field { align-content: start; }
.biab-field-label { display: block; }
.biab-field-hint { font-weight: 400; }
.biab-field-errors {
  display: grid;
  gap: .2rem;
  margin: 0;
  padding: 0;
  color: var(--danger);
  font-size: .84rem;
  font-weight: 650;
  list-style: none;
}
.biab-field [aria-invalid="true"] { border-color: var(--red); }
.biab-choice {
  display: grid;
  grid-template-columns: 1.25rem minmax(0, 1fr);
  align-items: start;
  gap: .6rem;
}
.biab-choice > input[type="checkbox"], .biab-choice > input[type="radio"] { margin-top: .14rem; }
.biab-choice > label { display: block; font-weight: 600; cursor: pointer; }
.biab-choice > label small { margin-top: .2rem; font-weight: 400; }
button[disabled], .button[aria-disabled="true"] { opacity: .55; cursor: not-allowed; }
.status-neutral { color: var(--blue); }
.status-positive { color: var(--positive); }
.status-warning { color: var(--warning); }
.status-danger { color: var(--danger); }
.biab-panel-heading { margin-bottom: 1rem; }
.biab-panel-heading .eyebrow { margin-bottom: .35rem; }
.biab-panel-subtitle { margin: .35rem 0 0; color: var(--muted); }
.biab-panel-actions { display: flex; flex-wrap: wrap; align-items: center; gap: .6rem; }
.biab-panel-body > :last-child { margin-bottom: 0; }
.empty-state {
  display: grid;
  justify-items: start;
  gap: .35rem;
  padding: 1.25rem;
  border: 1px dashed var(--line);
  border-radius: .4rem;
  color: var(--muted);
}
.empty-state strong { color: var(--ink); }
.empty-state p { margin: 0; }
.empty-state-action { margin-top: .45rem; }

.toast-region {
  position: fixed;
  z-index: 50;
  inset: 1rem 1rem auto auto;
  display: grid;
  gap: .6rem;
  width: min(25rem, calc(100vw - 2rem));
  pointer-events: none;
}
.toast {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: .9rem 1rem;
  border: 1px solid var(--toast-line);
  border-radius: .4rem;
  background: var(--toast);
  box-shadow: 0 .8rem 2rem var(--shadow-soft);
  pointer-events: auto;
}
.toast-error { border-color: var(--error-line); background: var(--error-surface); }
.toast-dismiss, .toast button {
  flex: 0 0 auto;
  min-height: 0;
  padding: 0;
  border: 0;
  background: transparent;
  color: currentColor;
  font-size: 1.25rem;
  line-height: 1;
}

.biab-icon {
  width: 1rem;
  height: 1rem;
  flex: 0 0 auto;
  stroke-width: 2;
}
.dismiss-icon { width: 1.15rem; height: 1.15rem; }

.install-banner {
  position: fixed;
  z-index: 40;
  right: 1rem;
  bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  width: min(34rem, calc(100vw - 2rem));
  padding: 1rem;
  border: 1px solid var(--red);
  border-radius: .5rem;
  background: var(--paper);
  box-shadow: 0 1rem 3rem var(--shadow);
}
.install-banner[hidden] { display: none; }
.install-banner > div:first-child { display: grid; flex: 1; gap: .2rem; }
.install-banner span { color: var(--muted); font-size: .86rem; }
.install-actions { display: flex; gap: .5rem; }
.install-actions button { white-space: nowrap; }

.auth-card, .receipt-page {
  max-width: 34rem !important;
  border: 1px solid var(--line);
  background: var(--paper);
  box-shadow: 0 1rem 3rem var(--card-shadow);
}
.demo-login { margin: 1.5rem 0; padding: 1rem; border: 1px solid var(--notice-line); border-radius: .4rem; background: var(--soft); }
.demo-login h2 { margin: .25rem 0 .35rem; }
.demo-login p { margin-bottom: .8rem; }

.app-frame {
  --app-header-height: 4.5rem;
  --app-sidebar-width: 15rem;
  min-height: 100vh;
}
.app-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: .75rem;
  min-height: var(--app-header-height);
  padding: .7rem 1rem;
  border-bottom: 1px solid var(--line);
  background: var(--header);
  backdrop-filter: blur(12px);
}
.brand { display: inline-flex; align-items: center; gap: .35rem; color: var(--ink); font-weight: 850; text-decoration: none; white-space: nowrap; }
.app-header .brand-icon { width: 18px; height: 18px; color: var(--red); }
.app-header-actions { display: flex; align-items: center; gap: .35rem; margin-left: auto; }
.app-theme-switcher {
  display: flex;
  align-items: center;
  gap: .15rem;
  padding: .18rem;
  border: 1px solid var(--line);
  border-radius: .45rem;
  background: var(--paper);
}
.app-theme-option {
  display: grid;
  place-items: center;
  width: 32px;
  min-height: 32px;
  padding: 0;
  border: 0;
  border-radius: .3rem;
  background: transparent;
  color: var(--muted);
}
.app-theme-option:hover { border: 0; background: var(--hover); color: var(--ink); }
.app-theme-option[aria-pressed="true"] { background: var(--soft); color: var(--red); }
.theme-icon { width: 17px; height: 17px; }
.sidebar-toggle {
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  width: 44px;
  min-height: 44px;
  padding: 0;
  border-color: transparent;
  background: transparent;
  color: var(--muted);
}
.sidebar-toggle:hover { border-color: transparent; background: var(--hover); color: var(--ink); }
.sidebar-toggle-icon { width: 20px; height: 20px; }
.sidebar-expand-icon { display: none; }
.app-workspace { display: flex; min-height: calc(100vh - var(--app-header-height)); }
.app-sidebar {
  position: sticky;
  top: var(--app-header-height);
  display: flex;
  flex: 0 0 var(--app-sidebar-width);
  flex-direction: column;
  align-self: flex-start;
  width: var(--app-sidebar-width);
  height: calc(100vh - var(--app-header-height));
  padding: 1rem .75rem;
  overflow-y: auto;
  overscroll-behavior: contain;
  border-right: 1px solid var(--line);
  background: var(--paper);
  transition: width 160ms ease, flex-basis 160ms ease;
}
.app-nav { display: grid; flex: 1; align-content: start; gap: 1rem; }
.app-nav-section, .app-menu-section { display: grid; gap: .2rem; }
.app-nav-section-label {
  margin: 0;
  padding: .25rem .7rem;
  overflow: hidden;
  color: var(--muted);
  font-size: .68rem;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
  white-space: nowrap;
}
.app-nav-link {
  display: flex;
  align-items: center;
  gap: .7rem;
  min-height: 2.75rem;
  padding: .55rem .7rem;
  overflow: hidden;
  border-radius: .38rem;
  color: var(--muted);
  font-size: .9rem;
  font-weight: 650;
  text-decoration: none;
  white-space: nowrap;
}
.app-nav-link:hover { background: var(--hover); color: var(--red); }
.app-nav-link[aria-current="page"] { background: var(--soft); color: var(--red); }
.app-nav-icon { width: 18px; height: 18px; }
.app-nav-label { overflow: hidden; text-overflow: ellipsis; }
.desktop-sign-out { display: block; margin: 1rem .7rem 0; }
.desktop-sign-out .button-link { min-height: 44px; gap: .7rem; white-space: nowrap; }
.app-main { min-width: 0; width: 100%; max-width: 74rem; margin: 0 auto; padding: 2rem 1.25rem 5rem; }
.page-heading { margin-bottom: 1.4rem; }
.page-heading h1 { margin-bottom: 0; }
.page-subtitle { max-width: 48rem; margin: .55rem 0 0; color: var(--muted); }

:root[data-app-sidebar-collapsed="true"] .app-frame,
.app-frame[data-sidebar-collapsed="true"] { --app-sidebar-width: 4.5rem; }
:is(
  :root[data-app-sidebar-collapsed="true"] .app-frame,
  .app-frame[data-sidebar-collapsed="true"]
) .app-sidebar { padding-inline: .65rem; }
:is(
  :root[data-app-sidebar-collapsed="true"] .app-frame,
  .app-frame[data-sidebar-collapsed="true"]
) .app-nav-section-label,
:is(
  :root[data-app-sidebar-collapsed="true"] .app-frame,
  .app-frame[data-sidebar-collapsed="true"]
) .app-nav-label,
:is(
  :root[data-app-sidebar-collapsed="true"] .app-frame,
  .app-frame[data-sidebar-collapsed="true"]
) .desktop-sign-out span { display: none; }
:is(
  :root[data-app-sidebar-collapsed="true"] .app-frame,
  .app-frame[data-sidebar-collapsed="true"]
) .app-nav { gap: .3rem; }
:is(
  :root[data-app-sidebar-collapsed="true"] .app-frame,
  .app-frame[data-sidebar-collapsed="true"]
) .app-nav-link { justify-content: center; padding-inline: .55rem; }
:is(
  :root[data-app-sidebar-collapsed="true"] .app-frame,
  .app-frame[data-sidebar-collapsed="true"]
) .desktop-sign-out { margin-inline: .55rem; }
:is(
  :root[data-app-sidebar-collapsed="true"] .app-frame,
  .app-frame[data-sidebar-collapsed="true"]
) .desktop-sign-out .button-link { width: 100%; justify-content: center; }
:is(
  :root[data-app-sidebar-collapsed="true"] .app-frame,
  .app-frame[data-sidebar-collapsed="true"]
) .sidebar-collapse-icon { display: none; }
:is(
  :root[data-app-sidebar-collapsed="true"] .app-frame,
  .app-frame[data-sidebar-collapsed="true"]
) .sidebar-expand-icon { display: block; }

.notification-drawer { position: relative; flex: 0 0 auto; margin: 0; }
.notification-drawer > summary {
  position: relative;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 999px;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}
.notification-drawer > summary::-webkit-details-marker { display: none; }
.notification-drawer > summary:hover { background: var(--hover); }
.app-header .notification-icon { width: 20px; height: 20px; }
.notification-drawer > summary i {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 9px;
  height: 9px;
  border: 2px solid var(--paper);
  border-radius: 999px;
  background: var(--red);
}
.notification-drawer-panel {
  position: absolute;
  top: calc(100% + .65rem);
  right: 0;
  width: min(24rem, calc(100vw - 1.5rem));
  padding: .8rem;
  border: 1px solid var(--line);
  border-radius: .5rem;
  background: var(--paper);
  box-shadow: 0 1rem 3rem var(--shadow);
}
.notification-drawer-heading { display: flex; justify-content: space-between; gap: 1rem; padding: .25rem .25rem .65rem; }
.notification-drawer-row { display: block; padding: .7rem .55rem; border-top: 1px solid var(--line-soft); color: var(--ink); text-decoration: none; }
.notification-drawer-row:hover { background: var(--hover); }
.notification-drawer-row small { margin-top: .15rem; }

.app-menu { display: none; margin: 0; }
.app-menu > summary {
  display: flex;
  align-items: center;
  gap: .5rem;
  min-height: 44px;
  padding: .4rem .55rem;
  border: 1px solid var(--line);
  border-radius: .3rem;
  color: var(--ink);
  font-weight: 750;
  cursor: pointer;
  list-style: none;
}
.app-menu > summary::-webkit-details-marker { display: none; }
.app-menu:not([open]) > .app-menu-panel { display: none; }
.app-header .menu-icon { width: 20px; height: 20px; }
.sign-out-icon { width: 18px; height: 18px; }
.app-menu-panel {
  position: absolute;
  top: 100%;
  right: 0;
  left: 0;
  display: grid;
  gap: .7rem;
  max-height: calc(100vh - 4rem);
  padding: .65rem .75rem 1rem;
  overflow-y: auto;
  border-bottom: 1px solid var(--line);
  background: var(--paper);
  box-shadow: 0 1rem 2rem var(--shadow-soft);
}
.app-menu-panel a { white-space: normal; }
.app-menu-panel form { display: block; margin: 0; padding: .45rem .7rem; }
.app-menu-panel form .button-link { min-height: 44px; gap: .7rem; }

.panel, .surface {
  margin-bottom: 1rem;
  padding: 1.15rem;
  border: 1px solid var(--line);
  border-radius: .4rem;
  background: var(--paper);
}
.panel-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; }
.panel-heading h2 { margin: 0; }
.summary-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: .8rem; margin-bottom: 1rem; }
.summary-card {
  display: grid;
  gap: .2rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: .4rem;
  background: var(--paper);
  color: var(--ink);
  text-decoration: none;
}
.summary-card strong { font-size: 1.5rem; }
.summary-card span { color: var(--muted); font-size: .84rem; }
.split-panels { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.row-link, .record, .check-row, .invoice-line, .invoice-total {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .8rem 0;
  border-bottom: 1px solid var(--line-soft);
}
.row-link { color: var(--ink); text-decoration: none; }
.row-link:hover strong { color: var(--red); }
.row-link > span:last-child { text-align: right; }
.record:last-child, .row-link:last-child { border-bottom: 0; }
.record > span { display: grid; gap: .25rem; }
.record.stacked { display: grid; }
.status {
  display: inline-block;
  color: var(--blue);
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.detail-grid, .form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.full { grid-column: 1 / -1; }
.action-row, .toolbar { display: flex; flex-wrap: wrap; align-items: flex-end; gap: .7rem; margin: 1rem 0; }
.action-row form { margin: 0; }
.toolbar label { max-width: 10rem; }
.panel > form + form, .panel > form + details, .panel > details + form,
.panel > form + p, details > form { margin-top: .8rem; }
.checkbox { display: flex; align-items: center; gap: .5rem; font-weight: 500; }
.checkbox input { width: auto; }
fieldset { min-width: 0; padding: .8rem; border: 1px solid var(--line); }
legend { padding: 0 .35rem; font-weight: 750; }
.invoice-paper { max-width: 46rem; }
.invoice-total { border-bottom: 0; font-size: 1.05rem; }
.invoice-total + .invoice-total { border-top: 2px solid var(--ink); }
.notice { padding: 1rem; border: 1px solid var(--notice-line); background: var(--soft); }
.notice.warning { border-color: var(--warning-line); background: var(--warning-surface); }

@media (max-width: 760px) {
  .app-header { gap: .65rem; padding-block: .65rem; }
  .brand { flex: 1; align-self: center; overflow: hidden; text-overflow: ellipsis; }
  .sidebar-toggle, .app-sidebar { display: none; }
  .app-menu { display: block; }
  .app-main { padding-top: 1.25rem; }
  .summary-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .split-panels, .detail-grid, .form-grid { grid-template-columns: 1fr; }
  .full { grid-column: auto; }
  .record.mobile-stack { align-items: flex-start; flex-direction: column; }
  .install-banner { align-items: stretch; flex-direction: column; }
  .app-theme-option { width: 30px; min-height: 30px; }
}

@media (max-width: 430px) {
  main:not(.app-main) { margin: 0; padding: 1.25rem; }
  .app-header, .app-main { padding-inline: .75rem; }
  .brand span { overflow: hidden; text-overflow: ellipsis; }
}