/* ---------- Design tokens ---------- */
:root {
  --paper: #E7DCC3;
  --paper-light: #F3ECDA;
  --ink-navy: #1B2A4A;
  --stamp-red: #B23A48;
  --airmail-blue: #3D5A80;
  --brass: #A67C3D;
  --charcoal-ink: #2A2622;

  --font-display: 'Special Elite', 'Courier New', monospace;
  --font-body: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, monospace;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --tap: 44px;

  --shadow-card: 0 2px 10px rgba(42, 38, 34, 0.18);
}

/* ---------- Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body,
h1, h2, h3, p,
ul, ol, li,
form, fieldset {
  margin: 0;
  padding: 0;
}

ul, ol {
  list-style: none;
}

fieldset {
  border: none;
}

img {
  max-width: 100%;
  display: block;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

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

a {
  color: var(--airmail-blue);
}

[hidden] {
  display: none !important;
}

.is-hidden {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- Base ---------- */
html {
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--paper);
  color: var(--charcoal-ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  min-height: 100vh;
  overflow-x: hidden;
}

:focus-visible {
  outline: 3px solid var(--brass);
  outline-offset: 2px;
}

h1, h2 {
  font-family: var(--font-display);
  color: var(--ink-navy);
  font-weight: 400;
  letter-spacing: 0.02em;
  line-height: 1.25;
}

/* ---------- App shell ---------- */
.app-shell {
  max-width: 480px;
  margin: 0 auto;
  padding: var(--space-4);
  padding-bottom: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

@media (min-width: 640px) {
  .app-shell {
    max-width: 560px;
    padding: var(--space-6) var(--space-5);
  }
}

.screen {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  animation: fade-in 0.2s ease-out;
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

.screen-start,
.screen-not-found {
  align-items: center;
  text-align: center;
  padding-top: var(--space-6);
}

.screen-heading {
  font-size: 1.5rem;
}

.screen-tagline {
  color: var(--charcoal-ink);
  opacity: 0.85;
  max-width: 38ch;
}

/* ---------- Status banner ---------- */
.status-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  background: var(--stamp-red);
  color: var(--paper-light);
  border-radius: var(--radius-sm);
  padding: var(--space-3) var(--space-3) var(--space-3) var(--space-4);
  font-size: 0.9rem;
}

.status-banner-message {
  flex: 1;
}

.status-banner-dismiss {
  width: var(--tap);
  height: var(--tap);
  min-width: var(--tap);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  line-height: 1;
  color: inherit;
  border-radius: 50%;
}

.status-banner-dismiss:hover {
  background: rgba(255, 255, 255, 0.15);
}

/* ---------- Ticket / passport card ---------- */
.ticket-card,
.panel-block,
.edit-trip-form,
.confirm-panel {
  background: var(--paper-light);
  border: 2px dashed var(--airmail-blue);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  box-shadow: var(--shadow-card);
}

.ticket-card {
  width: 100%;
}

.panel-heading {
  font-size: 1.05rem;
  margin-bottom: var(--space-3);
}

/* ---------- Stamp badge ---------- */
.stamp-badge {
  align-self: center;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 160px;
  min-height: 160px;
  max-width: 220px;
  padding: var(--space-4) var(--space-3);
  border-radius: 50%;
  border: 3px solid var(--ink-navy);
  box-shadow: inset 0 0 0 4px var(--paper), inset 0 0 0 6px var(--ink-navy);
  transform: rotate(-4deg);
  background: var(--paper-light);
}

.stamp-badge-text {
  font-family: var(--font-display);
  color: var(--ink-navy);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 1.05rem;
  text-align: center;
  line-height: 1.3;
  word-break: break-word;
}

.stamp-badge-lg {
  min-width: 190px;
  min-height: 190px;
  max-width: 240px;
}

.stamp-badge-lg .stamp-badge-text {
  font-size: 1.3rem;
}

.stamp-badge-red {
  border-color: var(--stamp-red);
  box-shadow: inset 0 0 0 4px var(--paper), inset 0 0 0 6px var(--stamp-red);
}

.stamp-badge-red .stamp-badge-text {
  color: var(--stamp-red);
}

/* Trip header uses a smaller, left-aligned stamp beside the meta column */
.trip-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.trip-header .stamp-badge {
  min-width: 108px;
  min-height: 108px;
  max-width: 108px;
  padding: var(--space-2);
  flex-shrink: 0;
}

.trip-header .stamp-badge-text {
  font-size: 0.85rem;
}

.trip-header-meta {
  flex: 1;
  min-width: 140px;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.trip-currency-line {
  font-size: 0.9rem;
  color: var(--charcoal-ink);
}

.trip-currency {
  font-family: var(--font-mono);
  font-weight: 600;
}

.trip-header-actions {
  display: flex;
  gap: var(--space-2);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--tap);
  padding: 0 var(--space-4);
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  border: 2px solid transparent;
  transition: filter 0.15s ease, transform 0.1s ease;
}

.btn:active {
  transform: translateY(1px);
}

.btn-block {
  width: 100%;
}

.btn-primary {
  background: var(--ink-navy);
  color: var(--paper-light);
}

.btn-primary:hover {
  filter: brightness(1.15);
}

.btn-secondary {
  background: transparent;
  color: var(--ink-navy);
  border-color: var(--ink-navy);
}

.btn-secondary:hover {
  background: rgba(27, 42, 74, 0.08);
}

.btn-brass {
  background: var(--brass);
  color: var(--paper-light);
}

.btn-brass:hover {
  filter: brightness(1.1);
}

.btn-danger {
  background: var(--stamp-red);
  color: var(--paper-light);
}

.btn-danger:hover {
  filter: brightness(1.1);
}

.icon-button {
  width: var(--tap);
  height: var(--tap);
  min-width: var(--tap);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--paper-light);
  border: 2px solid var(--airmail-blue);
  color: var(--airmail-blue);
  font-size: 1.1rem;
}

.icon-button:hover {
  background: var(--airmail-blue);
  color: var(--paper-light);
}

/* ---------- Forms ---------- */
.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.stack-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink-navy);
}

input[type="text"],
input[type="number"],
select {
  min-height: var(--tap);
  padding: 0 var(--space-3);
  border: 2px solid var(--airmail-blue);
  border-radius: var(--radius-sm);
  background: var(--paper-light);
  color: var(--charcoal-ink);
  width: 100%;
}

input[type="text"]:focus,
input[type="number"]:focus,
select:focus {
  border-color: var(--brass);
}

.form-actions {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.form-actions .btn {
  flex: 1;
}

.inline-form {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

.inline-form input {
  flex: 1;
}

.edit-trip-form {
  margin-top: calc(var(--space-5) * -1);
}

/* ---------- Tabs (boarding-pass stubs) ---------- */
.tab-bar {
  display: flex;
  border: 2px solid var(--ink-navy);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--paper-light);
}

.tab-button {
  flex: 1;
  min-height: 52px;
  font-family: var(--font-display);
  font-size: 0.95rem;
  letter-spacing: 0.03em;
  color: var(--ink-navy);
  text-transform: uppercase;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.tab-button + .tab-button {
  border-left: 2px dashed var(--airmail-blue);
}

.tab-button.is-active {
  background: var(--ink-navy);
  color: var(--paper-light);
}

.tab-button:hover:not(.is-active) {
  background: rgba(61, 90, 128, 0.12);
}

.tab-panel {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

/* ---------- Chips ---------- */
.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.chip {
  display: flex;
  align-items: center;
  height: var(--tap);
  min-width: 0;
  max-width: 100%;
  padding-left: var(--space-3);
  border: 2px solid var(--brass);
  border-radius: 999px;
  background: var(--paper-light);
  gap: var(--space-1);
}

.chip-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--charcoal-ink);
  min-width: 0;
  max-width: min(32ch, 45vw);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.chip-remove {
  width: var(--tap);
  height: var(--tap);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--brass);
  flex-shrink: 0;
}

.chip-remove:hover {
  background: var(--brass);
  color: var(--paper-light);
}

/* ---------- Expense list ---------- */
.expense-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.expense-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3);
  border: 1px solid var(--airmail-blue);
  border-radius: var(--radius-sm);
  background: var(--paper-light);
}

.expense-row-main {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.expense-desc {
  font-weight: 600;
  overflow-wrap: anywhere;
}

.expense-meta {
  font-size: 0.82rem;
  color: var(--charcoal-ink);
  opacity: 0.75;
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.expense-date {
  font-family: var(--font-mono);
  font-weight: 500;
}

.expense-row-side {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}

.expense-amount {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--ink-navy);
  white-space: nowrap;
}

.expense-delete {
  width: var(--tap);
  height: var(--tap);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--stamp-red);
  border: 2px solid transparent;
}

.expense-delete:hover {
  background: rgba(178, 58, 72, 0.12);
  border-color: var(--stamp-red);
}

.expense-row.is-confirming {
  border-color: var(--stamp-red);
  flex-wrap: wrap;
}

.expense-confirm-actions {
  display: flex;
  gap: var(--space-2);
  width: 100%;
}

.expense-confirm-actions .btn {
  flex: 1;
}

/* ---------- Balances ---------- */
.balance-list,
.transfer-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.balance-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-sm);
  border: 1px solid var(--airmail-blue);
  background: var(--paper-light);
}

.balance-name {
  font-weight: 600;
  overflow-wrap: anywhere;
}

.balance-status {
  font-family: var(--font-mono);
  font-weight: 600;
  white-space: nowrap;
}

.balance-row.is-positive {
  border-color: var(--airmail-blue);
  border-width: 2px;
}

.balance-row.is-positive .balance-status {
  color: var(--airmail-blue);
}

.balance-row.is-negative {
  border-color: var(--stamp-red);
  border-width: 2px;
}

.balance-row.is-negative .balance-status {
  color: var(--stamp-red);
}

.balance-row.is-zero {
  opacity: 0.65;
}

.balance-row.is-zero .balance-status {
  color: var(--charcoal-ink);
}

.settle-summary {
  font-size: 0.95rem;
}

.settle-summary strong {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--ink-navy);
}

.transfer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-sm);
  border: 1px dashed var(--brass);
  background: var(--paper-light);
}

.transfer-parties {
  font-weight: 600;
  overflow-wrap: anywhere;
}

.transfer-amount {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--brass);
  white-space: nowrap;
}

.empty-note {
  font-size: 0.9rem;
  opacity: 0.75;
  padding: var(--space-2) 0;
}

/* ---------- Reset / danger zone ---------- */
.reset-block {
  border-color: var(--stamp-red);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  align-items: flex-start;
}

.reset-block .panel-heading {
  color: var(--stamp-red);
}

.confirm-panel {
  border-style: solid;
  border-color: var(--stamp-red);
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

/* ---------- Wide content safety ---------- */
.expense-list,
.balance-list,
.transfer-list,
.chip-list {
  max-width: 100%;
  overflow-x: auto;
}