:root {
  --ink: #11241f;
  --ink-soft: #6c8a80;
  --ink-line: #24382f;
  --paper: #f6f1e4;
  --paper-dim: #e4dcc5;
  --gold: #c9a227;
  --gold-soft: #e8c96b;
  --rust: #c1573a;
  --radius: 16px;
  --font-display: ui-monospace, "SF Mono", "Cascadia Code", "Roboto Mono", Consolas, monospace;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  -webkit-tap-highlight-color: transparent;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
}

.hidden { display: none !important; }

button, input, select {
  font-family: inherit;
  font-size: 16px;
}

button {
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  border: none;
  background: none;
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--gold-soft);
  outline-offset: 2px;
}

/* ---------------------------------------------------------------- layout */

.app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh;
}

.app-header {
  padding: max(18px, env(safe-area-inset-top)) 20px 8px;
}

.app-header-title {
  font-family: var(--font-display);
  font-size: 15px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.screens {
  flex: 1;
  padding: 4px 16px 24px;
}

.screen { display: none; }
.screen.active { display: block; }

/* ------------------------------------------------------------ receipt card */

.receipt-card {
  position: relative;
  background: var(--paper);
  color: var(--ink);
  border-radius: var(--radius);
  padding: 30px 20px 22px;
  margin-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.receipt-card::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 16px;
  border-radius: var(--radius) var(--radius) 0 0;
  background-image: radial-gradient(circle at 8px 8px, var(--ink) 6px, transparent 6.5px);
  background-size: 24px 16px;
  background-repeat: repeat-x;
  background-position: center top;
}

.ticket-divider {
  border-top: 1.5px dashed var(--paper-dim);
  margin: 0 -4px;
}

.field, .amount-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field-label {
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.amount-row {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

#amount-input {
  font-family: var(--font-display);
  font-size: 40px;
  font-weight: 600;
  color: var(--ink);
  border: none;
  background: none;
  padding: 0;
  width: 100%;
  min-width: 0;
}

#amount-input::placeholder { color: var(--paper-dim); }

.currency {
  font-family: var(--font-display);
  font-size: 24px;
  color: var(--ink-soft);
}

.field input, .field select {
  border: 1.5px solid var(--paper-dim);
  border-radius: 10px;
  padding: 11px 12px;
  background: #fff;
  color: var(--ink);
}

.person-toggle {
  display: flex;
  gap: 8px;
}

.person-btn {
  flex: 1;
  padding: 11px 12px;
  border-radius: 10px;
  border: 1.5px solid var(--paper-dim);
  background: #fff;
  color: var(--ink-soft);
  font-weight: 600;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.person-btn.active {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--gold-soft);
}

.btn-primary {
  background: var(--gold);
  color: var(--ink);
  font-weight: 700;
  border-radius: 10px;
  padding: 14px 16px;
  text-align: center;
  transition: background 0.15s ease, transform 0.05s ease;
}

.btn-primary:active { transform: scale(0.98); }
.btn-primary:hover { background: var(--gold-soft); }

.btn-submit { margin-top: 4px; }
.btn-compact { padding: 11px 16px; white-space: nowrap; }

/* ---------------------------------------------------------------- recent */

.recent-block { margin-top: 26px; }

.section-label {
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 0 0 10px;
}

.recent-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.recent-item {
  position: relative;
  padding: 12px 4px;
  border-top: 1px dashed var(--ink-line);
  display: grid;
  grid-template-columns: 1fr auto;
  column-gap: 10px;
  row-gap: 2px;
}

.recent-item:first-child { border-top: none; }

.recent-main {
  display: flex;
  align-items: baseline;
  gap: 10px;
  min-width: 0;
}

.recent-amount {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  color: var(--gold-soft);
  white-space: nowrap;
}

.recent-category {
  color: var(--paper);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.recent-meta {
  grid-column: 1 / 2;
  font-size: 13px;
  color: var(--ink-soft);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.recent-delete {
  grid-row: 1 / 3;
  grid-column: 2;
  align-self: center;
  color: var(--rust);
  font-size: 16px;
  padding: 6px 8px;
}

.recent-list .empty {
  color: var(--ink-soft);
  padding: 12px 4px;
  font-style: italic;
}

/* ------------------------------------------------------------- categories */

.add-category-form {
  display: flex;
  gap: 8px;
  margin-top: 14px;
  margin-bottom: 22px;
}

.add-category-form input {
  flex: 1;
  border: 1.5px solid var(--ink-line);
  border-radius: 10px;
  padding: 11px 12px;
  background: var(--ink);
  color: var(--paper);
  min-width: 0;
}

.category-list {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
}

.category-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 11px 4px;
  border-top: 1px dashed var(--ink-line);
}

.category-item:first-child { border-top: none; }

.category-list.archived .category-item { color: var(--ink-soft); }

.archive-btn, .restore-btn {
  font-size: 13px;
  font-weight: 600;
  padding: 7px 12px;
  border-radius: 8px;
  white-space: nowrap;
}

.archive-btn { color: var(--rust); border: 1.5px solid var(--rust); }
.restore-btn { color: var(--gold-soft); border: 1.5px solid var(--gold-soft); }

.link-btn {
  color: var(--ink-soft);
  font-size: 13px;
  text-decoration: underline;
  padding: 10px 4px;
}

/* ---------------------------------------------------------------- tab bar */

.tab-bar {
  display: flex;
  border-top: 1px solid var(--ink-line);
  padding: 8px 8px max(8px, env(safe-area-inset-bottom));
  gap: 6px;
}

.tab-btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 8px 4px;
  border-radius: 10px;
  color: var(--ink-soft);
  font-size: 12px;
}

.tab-btn.active { color: var(--gold-soft); }

/* --------------------------------------------------------------- token gate */

.token-gate {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: var(--ink);
}

.token-card {
  width: 100%;
  max-width: 320px;
  background: var(--paper);
  color: var(--ink);
  border-radius: var(--radius);
  padding: 28px 22px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.token-title {
  font-family: var(--font-display);
  margin: 0;
  font-size: 22px;
}

.token-hint {
  margin: 0 0 4px;
  color: var(--ink-soft);
  font-size: 14px;
}

.token-card input {
  border: 1.5px solid var(--paper-dim);
  border-radius: 10px;
  padding: 12px;
  background: #fff;
  color: var(--ink);
}

/* --------------------------------------------------------------------- toast */

.toast {
  position: fixed;
  left: 50%;
  bottom: calc(84px + env(safe-area-inset-bottom));
  transform: translateX(-50%) translateY(10px);
  background: var(--ink);
  border: 1px solid var(--gold-soft);
  color: var(--paper);
  padding: 10px 16px;
  border-radius: 10px;
  font-size: 14px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  max-width: calc(100vw - 40px);
  text-align: center;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}

@media (min-width: 480px) {
  .screens { max-width: 420px; margin: 0 auto; width: 100%; }
  .tab-bar { max-width: 420px; margin: 0 auto; width: 100%; }
  .app-header { max-width: 420px; margin: 0 auto; width: 100%; }
}