:root {
  color-scheme: light;
  --bg: #f7faf8;
  --panel: #ffffff;
  --panel-soft: #f0f6f3;
  --ink: #18211f;
  --muted: #63706d;
  --faint: #8a9693;
  --line: #dce6e2;
  --primary: #167761;
  --primary-dark: #0e5d4c;
  --primary-soft: #e3f3ee;
  --accent: #c76f11;
  --accent-soft: #fff0d8;
  --danger: #bd403a;
  --danger-soft: #fde9e8;
  --violet: #6554c0;
  --shadow: 0 16px 36px rgba(24, 33, 31, 0.08);
  --radius: 8px;
  --font: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 15px;
  letter-spacing: 0;
}

button,
input,
select,
textarea {
  font: inherit;
}

button,
select,
input,
textarea {
  border-radius: var(--radius);
}

button {
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

label {
  color: var(--muted);
  display: grid;
  gap: 7px;
  font-size: 0.82rem;
  font-weight: 700;
}

input,
select,
textarea {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--line);
  background: #ffffff;
  color: var(--ink);
  padding: 9px 11px;
  outline: none;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

textarea {
  min-height: 78px;
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(22, 119, 97, 0.14);
}

.auth-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(320px, 440px) minmax(0, 1fr);
}

.auth-panel {
  background: var(--panel);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 26px;
  padding: 42px;
}

.auth-preview {
  display: grid;
  align-content: center;
  padding: 48px;
}

.preview-board {
  max-width: 680px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.brand-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: #ffffff;
  background: var(--primary);
  box-shadow: 0 12px 26px rgba(22, 119, 97, 0.25);
  flex: 0 0 auto;
}

.brand-mark svg {
  width: 24px;
  height: 24px;
}

.brand-copy {
  display: grid;
  gap: 1px;
}

.brand-name {
  font-size: 1.45rem;
  line-height: 1;
  font-weight: 850;
}

.brand-subtitle {
  color: var(--muted);
  font-size: 0.92rem;
}

.auth-card,
.panel,
.summary-tile,
.group-button,
.list-row,
.empty-state,
.member-chip,
.debt-row,
.preview-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.auth-card {
  display: grid;
  gap: 18px;
  padding: 20px;
  box-shadow: var(--shadow);
}

.auth-form {
  display: grid;
  gap: 13px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.form-grid .span-2,
.span-2 {
  grid-column: 1 / -1;
}

.segmented {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel-soft);
}

.segmented button {
  min-height: 36px;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-weight: 800;
}

.segmented button.active {
  background: var(--panel);
  color: var(--ink);
  box-shadow: 0 4px 12px rgba(24, 33, 31, 0.08);
}

.primary-btn,
.secondary-btn,
.ghost-btn,
.danger-btn,
.icon-btn,
.file-btn {
  min-height: 42px;
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 13px;
  font-weight: 800;
  text-decoration: none;
}

.primary-btn {
  background: var(--primary);
  color: #ffffff;
}

.primary-btn:hover {
  background: var(--primary-dark);
}

.secondary-btn,
.file-btn {
  border-color: var(--line);
  background: #ffffff;
  color: var(--ink);
}

.secondary-btn:hover,
.file-btn:hover {
  border-color: #c3d3ce;
  background: #fafdfe;
}

.ghost-btn,
.icon-btn {
  border-color: transparent;
  background: transparent;
  color: var(--muted);
}

.ghost-btn:hover,
.icon-btn:hover {
  background: var(--panel-soft);
  color: var(--ink);
}

.danger-btn {
  background: var(--danger-soft);
  color: var(--danger);
  border-color: #f6c9c7;
}

.icon-btn {
  width: 40px;
  height: 40px;
  padding: 0;
  flex: 0 0 auto;
}

.icon {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
}

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

.tiny {
  color: var(--faint);
  font-size: 0.78rem;
  line-height: 1.4;
}

.status {
  min-height: 22px;
  color: var(--danger);
  font-size: 0.86rem;
  font-weight: 750;
}

.toast {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 50;
  min-width: min(360px, calc(100vw - 44px));
  max-width: 460px;
  border: 1px solid var(--line);
  background: #ffffff;
  border-left: 4px solid var(--primary);
  box-shadow: var(--shadow);
  padding: 13px 14px;
  border-radius: var(--radius);
  font-weight: 750;
}

.toast.error {
  border-left-color: var(--danger);
}

.preview-card {
  padding: 18px;
  box-shadow: var(--shadow);
}

.preview-card.large {
  grid-column: 1 / -1;
}

.preview-title {
  color: var(--muted);
  font-weight: 800;
  margin-bottom: 10px;
}

.preview-money {
  font-size: 2rem;
  font-weight: 900;
}

.preview-lines {
  display: grid;
  gap: 10px;
}

.preview-line {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 12px;
}

.preview-bar {
  height: 9px;
  border-radius: 99px;
  background: var(--primary-soft);
  overflow: hidden;
}

.preview-bar span {
  display: block;
  height: 100%;
  background: var(--primary);
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
}

.sidebar {
  background: #ffffff;
  border-right: 1px solid var(--line);
  padding: 22px;
  display: grid;
  align-content: start;
  gap: 22px;
}

.sidebar-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.user-pill {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px;
  background: var(--panel-soft);
  border-radius: var(--radius);
}

.avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--primary);
  color: #ffffff;
  font-weight: 900;
  flex: 0 0 auto;
}

.sidebar-section {
  display: grid;
  gap: 10px;
}

.section-title {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

.mini-form {
  display: grid;
  gap: 8px;
}

.group-list {
  display: grid;
  gap: 8px;
}

.group-button {
  width: 100%;
  min-height: 62px;
  padding: 11px;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 10px;
  text-align: left;
  color: inherit;
}

.group-button.active {
  border-color: var(--primary);
  background: var(--primary-soft);
}

.group-name {
  font-weight: 850;
}

.group-meta {
  color: var(--muted);
  font-size: 0.82rem;
}

.workspace {
  min-width: 0;
  padding: 22px;
}

.topbar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
  margin-bottom: 18px;
}

.page-title {
  display: grid;
  gap: 4px;
}

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

h1 {
  font-size: 1.7rem;
  line-height: 1.15;
}

h2 {
  font-size: 1rem;
}

h3 {
  font-size: 0.95rem;
}

.tabs {
  min-width: min(520px, 48vw);
}

.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  gap: 16px;
  align-items: start;
}

.content-grid.wide-left {
  grid-template-columns: minmax(0, 0.95fr) minmax(340px, 1.05fr);
}

.stack {
  display: grid;
  gap: 16px;
}

.panel {
  padding: 16px;
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.summary-tile {
  padding: 14px;
  display: grid;
  gap: 8px;
  min-height: 106px;
}

.tile-label {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 850;
}

.tile-value {
  font-size: 1.35rem;
  font-weight: 900;
  line-height: 1.1;
}

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

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

.neutral {
  color: var(--muted);
}

.list {
  display: grid;
  gap: 9px;
}

.list-row {
  min-height: 58px;
  padding: 12px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
}

.row-main {
  min-width: 0;
  display: grid;
  gap: 4px;
}

.row-title {
  font-weight: 850;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.row-meta {
  color: var(--muted);
  font-size: 0.84rem;
}

.row-actions {
  display: flex;
  align-items: center;
  gap: 7px;
}

.amount {
  font-weight: 900;
}

.debt-row {
  padding: 12px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
}

.member-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 10px;
}

.member-chip {
  padding: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.member-chip .row-main {
  gap: 2px;
}

.expense-form,
.settlement-form,
.member-form {
  display: grid;
  gap: 12px;
}

.participant-list {
  display: grid;
  gap: 8px;
}

.participant-row {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  min-height: 52px;
  padding: 8px 10px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) minmax(110px, 0.32fr);
  gap: 10px;
  align-items: center;
}

.participant-row input[type="checkbox"] {
  width: 18px;
  min-height: 18px;
}

.participant-row .custom-amount {
  min-height: 36px;
  padding: 7px 9px;
}

.empty-state {
  padding: 26px;
  min-height: 220px;
  display: grid;
  place-items: center;
  text-align: center;
  gap: 14px;
}

.empty-state .brand-mark {
  margin: 0 auto;
}

.file-input {
  display: none;
}

.data-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.data-actions .file-btn,
.data-actions button {
  min-width: 0;
}

@media (max-width: 1120px) {
  .summary-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .content-grid,
  .content-grid.wide-left {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 860px) {
  .auth-shell,
  .app-shell {
    grid-template-columns: 1fr;
  }

  .auth-panel {
    min-height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding: 26px;
  }

  .auth-preview {
    padding: 22px;
  }

  .preview-board {
    grid-template-columns: 1fr;
  }

  .sidebar {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .topbar {
    grid-template-columns: 1fr;
  }

  .tabs {
    min-width: 0;
  }
}

@media (max-width: 620px) {
  .workspace,
  .sidebar,
  .auth-panel,
  .auth-preview {
    padding: 16px;
  }

  .form-grid,
  .summary-grid {
    grid-template-columns: 1fr;
  }

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

  .participant-row .custom-amount {
    grid-column: 1 / -1;
  }

  .list-row,
  .debt-row {
    grid-template-columns: 1fr;
  }

  .row-actions {
    justify-content: flex-start;
  }
}