:root {
  color-scheme: light;
  --paper: #f4f0e6;
  --paper-deep: #e8e1d2;
  --sheet: #fbf8ef;
  --sheet-soft: #f1ecdf;
  --ink: #191817;
  --pencil: #615d55;
  --pencil-light: #9a9488;
  --rule: rgba(25, 24, 23, 0.24);
  --rule-soft: rgba(25, 24, 23, 0.12);
  --wash: rgba(25, 24, 23, 0.055);
  --hover: rgba(25, 24, 23, 0.055);
  --button-hover: #eee8da;
  --danger: #b42318;
  --danger-hover: #8f1d14;
  --danger-text: #b42318;
  --danger-contrast: #fff;
  --positive: #242321;
  --shadow: 0 10px 24px rgba(25, 24, 23, 0.06);
  --button-shadow: 0 8px 18px rgba(25, 24, 23, 0.08);
  --focus-ring: rgba(25, 24, 23, 0.1);
  --page-start: rgba(251, 248, 239, 0.82);
  --page-end: rgba(244, 240, 230, 0.96);
  --topbar-start: rgba(251, 248, 239, 0.94);
  --topbar-end: rgba(244, 240, 230, 0.9);
  --grid-line: rgba(25, 24, 23, 0.045);
  --grid-line-soft: rgba(25, 24, 23, 0.038);
  --success-bg: #f7f4ea;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --paper: #151514;
  --paper-deep: #1d1c1a;
  --sheet: #24231f;
  --sheet-soft: #2d2b26;
  --ink: #f7f1e7;
  --pencil: #c9c0ad;
  --pencil-light: #a79d8d;
  --rule: rgba(247, 241, 231, 0.28);
  --rule-soft: rgba(247, 241, 231, 0.14);
  --wash: rgba(247, 241, 231, 0.07);
  --hover: rgba(247, 241, 231, 0.1);
  --button-hover: #343128;
  --danger: #b93a30;
  --danger-hover: #9f2c24;
  --danger-text: #ff8b80;
  --danger-contrast: #fff;
  --positive: #f0eadc;
  --shadow: 0 14px 30px rgba(0, 0, 0, 0.32);
  --button-shadow: 0 10px 22px rgba(0, 0, 0, 0.26);
  --focus-ring: rgba(247, 241, 231, 0.18);
  --page-start: rgba(21, 21, 20, 0.96);
  --page-end: rgba(13, 13, 12, 0.98);
  --topbar-start: rgba(21, 21, 20, 0.94);
  --topbar-end: rgba(21, 21, 20, 0.84);
  --grid-line: rgba(247, 241, 231, 0.055);
  --grid-line-soft: rgba(247, 241, 231, 0.04);
  --success-bg: #2f2d25;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
}

body {
  margin: 0;
  min-height: 100%;
  overflow-x: hidden;
  background:
    linear-gradient(180deg, var(--page-start), var(--page-end)),
    var(--paper);
  color: var(--ink);
  accent-color: var(--ink);
  font-family: "Trebuchet MS", "Segoe UI", ui-sans-serif, system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  transition: background 180ms ease, color 180ms ease;
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  color: var(--ink);
}

a:focus-visible,
button:focus-visible {
  outline: 0;
  box-shadow: 0 0 0 3px var(--focus-ring);
}

main a:not(.button):not(.brand):not(.row-title):not(.trip-link) {
  color: var(--ink);
  font-weight: 900;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
}

main a:not(.button):not(.brand):not(.row-title):not(.trip-link):hover {
  background: var(--hover);
}

main {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 40px 0 72px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 70px;
  padding: 0 max(20px, calc((100vw - 1180px) / 2));
  background:
    linear-gradient(180deg, var(--topbar-start), var(--topbar-end)),
    var(--paper);
  border-bottom: 1px solid var(--rule-soft);
  box-shadow: none;
  backdrop-filter: blur(10px);
}

.theme-toggle {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 30;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: var(--sheet);
  color: var(--ink);
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: transform 140ms ease, border-color 140ms ease, background 140ms ease, box-shadow 140ms ease;
}

.theme-toggle:hover {
  transform: translateY(-1px);
  border-color: var(--ink);
  background: var(--button-hover);
  box-shadow: var(--button-shadow);
}

.theme-toggle-icon {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
  color: var(--ink);
  stroke-width: 2.2;
}

.theme-toggle-moon {
  display: none;
}

:root[data-theme="dark"] .theme-toggle-sun {
  display: none;
}

:root[data-theme="dark"] .theme-toggle-moon {
  display: block;
}

.brand {
  position: relative;
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 900;
  font-size: 1.28rem;
  letter-spacing: 0;
}

.brand::after {
  content: "";
  position: absolute;
  left: -3px;
  right: -6px;
  bottom: -5px;
  height: 6px;
  border-bottom: 1px solid var(--ink);
  transform: rotate(-1.2deg);
  opacity: 0.26;
}

.nav,
.actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.nav a,
.link-button {
  font: inherit;
  color: var(--ink);
  font-weight: 700;
  min-height: 34px;
  padding: 6px 10px;
  border: 1px solid var(--rule-soft);
  border-radius: 6px;
  background: var(--sheet);
  transition: border-color 140ms ease, background 140ms ease, color 140ms ease;
}

.nav .button {
  color: var(--ink);
  border-color: var(--ink);
  background: var(--sheet);
}

.nav a:not(.button):hover,
.link-button:hover {
  color: var(--ink);
  border-color: var(--rule-soft);
  background: var(--button-hover);
}

.inline-form {
  display: inline;
  margin: 0;
}

.link-button {
  background: var(--sheet);
  cursor: pointer;
}

.button {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--ink);
  border-radius: 6px;
  background: var(--sheet);
  color: var(--ink);
  font-weight: 900;
  box-shadow: none;
  transition: transform 140ms ease, box-shadow 140ms ease, background 140ms ease;
}

.button:hover {
  transform: translateY(-1px);
  box-shadow: var(--button-shadow);
  color: var(--ink);
  background: var(--button-hover);
}

.button.secondary {
  background: var(--sheet);
  color: var(--ink);
  border-color: var(--rule);
  box-shadow: none;
}

.button.secondary:hover {
  color: var(--ink);
  background: var(--button-hover);
}

.button.danger {
  background: var(--danger);
  border-color: var(--danger);
  color: var(--danger-contrast);
}

.button.danger:hover {
  background: var(--danger-hover);
  border-color: var(--danger-hover);
  color: var(--danger-contrast);
}

.button.ghost {
  background: var(--sheet);
  color: var(--danger-text);
}

.button.small {
  min-height: 36px;
  padding: 0 13px;
}

.button.full,
.full {
  width: 100%;
}

.eyebrow {
  position: relative;
  display: inline-block;
  margin: 0 0 12px;
  color: var(--pencil);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 16px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.5rem, 7vw, 6rem);
  line-height: 0.95;
  letter-spacing: 0;
  text-shadow: none;
}

h2 {
  margin-bottom: 12px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.32rem;
  letter-spacing: 0;
}

h3 {
  margin: 24px 0 10px;
  font-size: 1rem;
  letter-spacing: 0;
}

.lead {
  max-width: 520px;
  color: var(--pencil);
  font-size: 1.22rem;
}

.landing-main {
  position: relative;
  isolation: isolate;
  width: 100%;
  min-height: 100svh;
  display: grid;
  place-items: center;
  padding: 32px;
  overflow: hidden;
  background:
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px),
    linear-gradient(0deg, var(--grid-line-soft) 1px, transparent 1px),
    linear-gradient(180deg, var(--page-start), var(--page-end)),
    var(--paper);
  background-size: 44px 44px, 44px 44px, auto, auto;
}

.landing-main::before,
.landing-main::after {
  content: none;
}

.landing-simple {
  position: relative;
  z-index: 1;
  width: min(720px, 100%);
  display: grid;
  place-items: center;
  text-align: center;
}

.landing-copy {
  width: 100%;
  max-width: 720px;
  animation: landing-rise 420ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

.landing-simple h1 {
  margin-bottom: 18px;
  font-size: clamp(4.6rem, 13vw, 8.25rem);
}

.landing-simple .lead {
  max-width: 640px;
  margin: 0 auto;
  color: var(--pencil);
  font-size: clamp(1.16rem, 2vw, 1.45rem);
}

.landing-actions {
  justify-content: center;
  margin-top: 32px;
}

@keyframes landing-rise {
  from {
    transform: translateY(14px);
  }
  to {
    transform: translateY(0);
  }
}

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

.muted,
.row-meta,
small {
  color: var(--pencil);
}

.welcome-text {
  margin-bottom: 10px;
  color: var(--pencil);
  font-size: 1.08rem;
  font-weight: 900;
}

.page-head,
.auth-layout,
.form-layout,
.confirm-layout {
  display: flex;
  justify-content: space-between;
  gap: 32px;
  align-items: flex-start;
  margin-bottom: 36px;
}

.page-head {
  padding: 24px 0 26px;
}

.trip-list-head {
  margin-bottom: 20px;
}

.head-actions {
  justify-content: flex-end;
}

.auth-layout,
.form-layout {
  display: grid;
  grid-template-columns: 1fr;
  max-width: 620px;
  min-width: 0;
  margin-left: auto;
  margin-right: auto;
  gap: 24px;
}

.auth-layout h1,
.form-layout h1 {
  font-size: clamp(3.2rem, 9vw, 5.2rem);
}

.auth-layout .muted,
.form-layout .muted {
  max-width: 52ch;
  margin-bottom: 0;
}

.confirm-layout {
  display: block;
  max-width: 620px;
  padding: 28px;
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: var(--sheet);
  box-shadow: var(--shadow);
}

.text-band {
  padding: 18px 0;
  margin-bottom: 34px;
}

.workspace.two-columns {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 360px);
  gap: 44px;
  align-items: start;
}

.trip-workspace {
  margin-top: 32px;
}

.context-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin: 0 0 34px;
}

.context-strip div {
  min-height: 92px;
  padding: 16px;
  border: 1px solid var(--rule-soft);
  border-radius: 8px;
  background: var(--sheet-soft);
}

.context-strip span,
.context-strip strong {
  display: block;
}

.context-strip span {
  color: var(--pencil);
  font-size: 0.84rem;
  font-weight: 900;
  text-transform: uppercase;
}

.context-strip strong {
  margin-top: 8px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.18rem;
}

.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.section-title h2 {
  margin-bottom: 0;
}

.ruled-title {
  padding-bottom: 12px;
}

.section-title.spaced {
  margin-top: 38px;
}

.panel,
.form-panel {
  min-width: 0;
  padding: 24px;
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: var(--sheet);
  box-shadow: var(--shadow);
}

.side-column {
  display: grid;
  gap: 20px;
}

.side-column.pinned {
  position: sticky;
  top: 96px;
}

.finance-panel {
  transform: none;
}

.list-grid {
  display: grid;
  gap: 10px;
}

.sheet-section {
  position: relative;
  padding-top: 8px;
}

.trip-row,
.timeline-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
  padding: 18px 0;
  border-bottom: 1px solid var(--rule-soft);
}

.trip-row {
  transition: transform 150ms ease, background 150ms ease;
  border-radius: 8px;
  padding-left: 10px;
  padding-right: 10px;
}

.trip-row:hover {
  transform: translateX(3px);
  background: var(--hover);
}

.trip-link {
  display: block;
}

.row-title {
  display: block;
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 900;
  font-size: 1.08rem;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

.row-stats {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  color: var(--pencil);
  font-size: 0.92rem;
}

.row-stats span {
  padding: 3px 8px;
  border: 1px solid var(--rule-soft);
  border-radius: 6px;
  background: var(--sheet);
}

.timeline {
  display: grid;
  gap: 0;
}

.timeline-item {
  grid-template-columns: 46px minmax(0, 1fr);
  align-items: start;
}

.timeline-marker {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--rule);
  border-radius: 50%;
  background: var(--sheet);
  color: var(--ink);
  font-weight: 900;
  box-shadow: none;
}

.table-wrap {
  position: relative;
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: var(--sheet);
  box-shadow: var(--shadow);
}

table {
  position: relative;
  z-index: 1;
  width: 100%;
  border-collapse: collapse;
  min-width: 620px;
}

th,
td {
  padding: 13px 14px;
  border-bottom: 1px solid var(--rule-soft);
  text-align: left;
}

th {
  color: var(--pencil);
  font-size: 0.8rem;
  text-transform: uppercase;
}

tr:last-child td {
  border-bottom: 0;
}

.number {
  text-align: right;
  white-space: nowrap;
}

.table-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  white-space: nowrap;
}

.metric-stack {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 20px;
}

.metric-stack div {
  padding: 16px;
  border: 1px solid var(--rule-soft);
  border-radius: 8px;
  background: var(--sheet-soft);
}

.metric-stack span,
.metric-stack strong {
  display: block;
}

.metric-stack strong {
  margin-top: 4px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.16rem;
}

.balance-list,
.weather-list {
  display: grid;
  gap: 8px;
}

.balance-row,
.weather-row {
  display: grid;
  gap: 3px;
  padding: 10px 0;
  border-bottom: 1px solid var(--rule-soft);
}

.balance-row {
  grid-template-columns: minmax(0, 1fr) auto;
}

.positive {
  color: var(--positive);
}

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

.plain-list {
  display: grid;
  gap: 8px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.plain-list li {
  padding-left: 16px;
  border-left: 1px solid var(--rule);
}

.traveler-list {
  display: grid;
  gap: 8px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.traveler-list li {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  min-height: 38px;
  padding: 6px 6px 6px 12px;
  border: 1px solid var(--rule-soft);
  border-radius: 8px;
  background: var(--sheet-soft);
}

.traveler-list form {
  margin: 0;
}

.invite-form {
  margin-top: 18px;
}

.icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: var(--sheet);
  color: var(--ink);
  cursor: pointer;
  font: inherit;
  font-size: 1.1rem;
  font-weight: 900;
  line-height: 1;
  transition: transform 140ms ease, border-color 140ms ease, background 140ms ease, color 140ms ease;
}

.icon-button:hover {
  transform: translateY(-1px);
  border-color: var(--ink);
  background: var(--button-hover);
}

.icon-button.danger {
  border-color: var(--danger);
  background: var(--danger);
  color: var(--danger-contrast);
}

.icon-button.danger:hover {
  border-color: var(--danger-hover);
  background: var(--danger-hover);
  color: var(--danger-contrast);
}

.vertical-actions,
.stack-form {
  display: grid;
  gap: 12px;
}

.city-search {
  display: grid;
  gap: 8px;
  margin-bottom: 16px;
}

.city-search-box {
  display: block;
}

.city-search-results {
  display: grid;
  gap: 6px;
  margin-top: 2px;
}

.city-search-result {
  display: grid;
  gap: 2px;
  width: 100%;
  min-height: 52px;
  padding: 9px 12px;
  border: 1px solid var(--rule-soft);
  border-radius: 8px;
  background: var(--sheet-soft);
  color: var(--ink);
  cursor: pointer;
  font: inherit;
  text-align: left;
  transition: border-color 140ms ease, background 140ms ease, transform 140ms ease;
}

.city-search-result:hover,
.city-search-result.is-active {
  transform: translateX(2px);
  border-color: var(--rule);
  background: var(--button-hover);
}

.city-search-result strong {
  font-size: 0.96rem;
}

.city-search-result span {
  color: var(--pencil);
  font-size: 0.86rem;
}

.city-search-status {
  min-height: 1.3em;
  margin: 0;
}

.field {
  display: grid;
  gap: 7px;
  margin-bottom: 16px;
}

label {
  font-weight: 900;
}

input,
textarea,
select {
  width: 100%;
  min-width: 0;
  min-height: 42px;
  padding: 10px 12px;
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: var(--sheet);
  color: var(--ink);
  font: inherit;
  box-shadow: none;
}

textarea {
  min-height: 110px;
  resize: vertical;
}

input:focus,
textarea:focus,
select:focus {
  outline: 0;
  border-color: var(--ink);
  box-shadow: inset 0 0 0 1px var(--ink), 0 0 0 3px var(--focus-ring);
}

.form-foot {
  margin: 14px 0 0;
  overflow-wrap: break-word;
}

.form-foot a {
  display: inline-flex;
  min-height: 32px;
  align-items: center;
}

.form-errors,
.error {
  color: var(--danger-text);
}

.empty-state {
  padding: 42px 0;
}

.empty-state.compact {
  padding: 24px 0;
}

.messages {
  width: min(1180px, calc(100% - 32px));
  margin: 18px auto 0;
  display: grid;
  gap: 8px;
}

.message {
  margin: 0;
  padding: 12px 14px;
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: var(--sheet);
  box-shadow: var(--shadow);
}

.message.success {
  background: var(--success-bg);
}

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

@media (max-width: 860px) {
  main {
    width: min(calc(100% - 24px), 680px);
    padding-top: 28px;
  }

  .topbar,
  .page-head,
  .auth-layout,
  .form-layout,
  .workspace.two-columns,
  .context-strip {
    display: grid;
    grid-template-columns: 1fr;
  }

  .topbar {
    gap: 12px;
    padding: 12px 16px;
  }

  .auth-layout,
  .form-layout {
    min-width: 0;
  }

  .nav {
    justify-content: start;
  }

  .side-column.pinned {
    position: static;
  }

  h1 {
    font-size: clamp(2.1rem, 15vw, 4rem);
  }

  .trip-row {
    grid-template-columns: 1fr;
  }

  .row-stats,
  .actions {
    align-items: stretch;
  }

  .metric-stack {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  main:not(.landing-main) {
    width: auto;
    margin-left: 16px;
    margin-right: 16px;
  }

  .landing-main {
    width: 100%;
    margin-left: auto;
    margin-right: auto;
  }

  .lead {
    max-width: 100%;
    font-size: 1.08rem;
    line-height: 1.45;
    overflow-wrap: break-word;
  }

  .auth-layout .muted,
  .form-layout .muted {
    max-width: 28ch;
  }

  .auth-layout .form-panel,
  .form-layout .form-panel {
    width: 100%;
    max-width: 300px;
    justify-self: start;
  }

  .button,
  .actions,
  .nav,
  .table-actions {
    width: 100%;
  }

  .button {
    min-width: 0;
  }

  .topbar .nav,
  .topbar .button {
    width: auto;
  }

  .landing-simple {
    width: 100%;
  }

  .landing-simple h1 {
    font-size: clamp(3rem, 15vw, 3.9rem);
    overflow-wrap: anywhere;
  }

  .landing-actions,
  .landing-actions .button {
    width: 100%;
  }

  .landing-actions {
    display: grid;
    gap: 12px;
  }

  .landing-simple .lead,
  .auth-layout .muted,
  .form-layout .muted {
    max-width: 24ch;
  }

  .landing-main {
    background-size: 34px 34px, 34px 34px, auto, auto;
  }

  .theme-toggle {
    right: 12px;
    bottom: 12px;
  }
}