/* ===================== Design tokens ===================== */
:root {
  --color-primary: #059669;
  --color-primary-hover: #047857;
  --color-on-primary: #ffffff;
  --color-secondary: #10b981;
  --color-accent: #dc2626;
  --color-accent-soft: #fef2f2;

  --color-background: #f8fafc;
  --color-surface: #ffffff;
  --color-foreground: #0f172a;
  --color-muted-fg: #64748b;
  --color-muted: #f0f8f6;
  --color-border: #e1f2ed;

  --color-positive: #059669;
  --color-positive-soft: #ecfdf5;
  --color-negative: #dc2626;
  --color-negative-soft: #fef2f2;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 999px;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.12);

  --font-sans: "Be Vietnam Pro", "Noto Sans", system-ui, -apple-system, sans-serif;

  --duration-fast: 150ms;
  --duration-base: 220ms;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  color-scheme: light;
}

:root[data-theme="dark"] {
  --color-primary: #34d399;
  --color-primary-hover: #6ee7b7;
  --color-on-primary: #052e21;
  --color-secondary: #10b981;
  --color-accent: #f87171;
  --color-accent-soft: #3f1618;

  --color-background: #0b1220;
  --color-surface: #121a2b;
  --color-foreground: #eef2f6;
  --color-muted-fg: #94a3b8;
  --color-muted: #16233a;
  --color-border: #223049;

  --color-positive: #34d399;
  --color-positive-soft: #0f2a22;
  --color-negative: #f87171;
  --color-negative-soft: #341417;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.45);

  color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-primary: #34d399;
    --color-primary-hover: #6ee7b7;
    --color-on-primary: #052e21;
    --color-secondary: #10b981;
    --color-accent: #f87171;
    --color-accent-soft: #3f1618;

    --color-background: #0b1220;
    --color-surface: #121a2b;
    --color-foreground: #eef2f6;
    --color-muted-fg: #94a3b8;
    --color-muted: #16233a;
    --color-border: #223049;

    --color-positive: #34d399;
    --color-positive-soft: #0f2a22;
    --color-negative: #f87171;
    --color-negative-soft: #341417;

    color-scheme: dark;
  }
}

/* ===================== Base ===================== */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
[hidden] { display: none !important; }

body {
  margin: 0;
  min-height: 100dvh;
  background: var(--color-background);
  color: var(--color-foreground);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

h1, h2, h3 { margin: 0; font-weight: 700; }
p { margin: 0; }
button { font-family: inherit; }
input, select { font-family: inherit; }

a, button, [role="button"], select, input[type="checkbox"], .chip, .tab-btn {
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

svg { width: 20px; height: 20px; flex-shrink: 0; }

/* ===================== App shell ===================== */
.app {
  max-width: 1180px;
  margin: 0 auto;
  padding: var(--space-4) var(--space-4) var(--space-7);
}

@media (min-width: 768px) {
  .app { padding: var(--space-5) var(--space-5) var(--space-7); }
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-2);
  padding: var(--space-2) 0 var(--space-4);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-width: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--color-primary);
  color: var(--color-on-primary);
  flex-shrink: 0;
}

.brand h1 {
  font-size: 1.25rem;
  letter-spacing: -0.01em;
}

.brand-sub {
  font-size: 0.8125rem;
  color: var(--color-muted-fg);
  margin-top: 1px;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}

/* ===================== Buttons ===================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 44px;
  padding: 0 var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  font-size: 0.9375rem;
  font-weight: 600;
  transition: background-color var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-out),
              opacity var(--duration-fast) var(--ease-out);
  white-space: nowrap;
}
.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; transform: none; }

.btn-primary {
  background: var(--color-primary);
  color: var(--color-on-primary);
}
.btn-primary:hover:not(:disabled) { background: var(--color-primary-hover); }

.btn-secondary {
  background: var(--color-muted);
  color: var(--color-primary);
  border-color: var(--color-border);
}
.btn-secondary:hover:not(:disabled) { background: var(--color-border); }

.btn-ghost {
  background: transparent;
  color: var(--color-muted-fg);
  border-color: var(--color-border);
}
.btn-ghost:hover:not(:disabled) { background: var(--color-muted); color: var(--color-foreground); }

.btn-danger {
  background: var(--color-negative-soft);
  color: var(--color-negative);
}
.btn-danger:hover:not(:disabled) { background: var(--color-negative); color: #fff; }

.btn-sm { min-height: 38px; padding: 0 var(--space-3); font-size: 0.8125rem; }

.icon-btn {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-foreground);
  transition: background-color var(--duration-fast) var(--ease-out);
}
.icon-btn:hover { background: var(--color-muted); }

.link-btn {
  background: none;
  border: none;
  color: var(--color-primary);
  font-size: 0.8125rem;
  font-weight: 600;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
}
.link-btn:hover { background: var(--color-muted); }

/* Theme toggle icon swap */
.icon-btn .i-moon { display: none; }
:root[data-theme="dark"] .icon-btn .i-sun { display: none; }
:root[data-theme="dark"] .icon-btn .i-moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .icon-btn .i-sun { display: none; }
  :root:not([data-theme="light"]) .icon-btn .i-moon { display: block; }
}

/* ===================== Tabs (mobile) ===================== */
.tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2);
  background: var(--color-muted);
  padding: var(--space-1);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
}

.tab-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 44px;
  border: none;
  background: transparent;
  border-radius: var(--radius-sm);
  color: var(--color-muted-fg);
  font-weight: 600;
  font-size: 0.9375rem;
  transition: background-color var(--duration-fast) var(--ease-out), color var(--duration-fast) var(--ease-out);
  position: relative;
}

.tab-btn.active {
  background: var(--color-surface);
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.tab-badge {
  position: absolute;
  top: 2px;
  right: 8px;
  min-width: 18px;
  height: 18px;
  padding: 0 4px;
  border-radius: var(--radius-full);
  background: var(--color-accent);
  color: #fff;
  font-size: 0.6875rem;
  font-weight: 700;
  display: grid;
  place-items: center;
}

@media (min-width: 1024px) {
  .tabs { display: none; }
}

/* ===================== Layout ===================== */
.layout {
  display: block;
}

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

.panel > .card + .card { margin-top: var(--space-4); }

@media (min-width: 1024px) {
  .layout {
    display: grid;
    grid-template-columns: minmax(340px, 420px) minmax(0, 1fr);
    gap: var(--space-5);
    align-items: start;
  }
  .panel { display: block; min-width: 0; }
}

/* ===================== Card ===================== */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  box-shadow: var(--shadow-sm);
}

@media (min-width: 768px) {
  .card { padding: var(--space-5); }
}

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.trip-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
  padding: var(--space-3) var(--space-4);
}

.trip-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
  flex: 1 1 170px;
}

.trip-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-muted-fg);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.trip-name-input {
  border: 1.5px solid transparent;
  background: transparent;
  padding: 2px 6px;
  margin-left: -6px;
  font-size: 1.0625rem;
  font-weight: 700;
  min-height: 36px;
  width: 100%;
}

.trip-name-input:hover { border-color: var(--color-border); }
.trip-name-input:focus { border-color: var(--color-primary); background: var(--color-surface); }

.trip-actions {
  display: flex;
  gap: var(--space-2);
  flex-shrink: 0;
}

.card-head h2 {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 1.0625rem;
}

.card-head h2 svg { color: var(--color-primary); }

.hint-text {
  font-size: 0.75rem;
  color: var(--color-muted-fg);
  flex-shrink: 0;
}

.count-chip {
  display: inline-grid;
  place-items: center;
  min-width: 26px;
  height: 26px;
  padding: 0 var(--space-2);
  border-radius: var(--radius-full);
  background: var(--color-muted);
  color: var(--color-primary);
  font-size: 0.8125rem;
  font-weight: 700;
}

.empty-hint {
  color: var(--color-muted-fg);
  font-size: 0.875rem;
  text-align: center;
  padding: var(--space-4) var(--space-2);
}

/* ===================== Members ===================== */
.inline-form {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.inline-form input {
  flex: 1;
  min-width: 0;
}

.inline-form .btn {
  padding: 0 var(--space-3);
}

input[type="text"], input[type="number"], input[type="tel"], input[type="password"], select {
  min-height: 44px;
  padding: 0 var(--space-3);
  border-radius: var(--radius-md);
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-foreground);
  font-size: 1rem;
  width: 100%;
  transition: border-color var(--duration-fast) var(--ease-out);
}

input:focus, select:focus {
  border-color: var(--color-primary);
  outline: none;
}

input:-webkit-autofill,
input:-webkit-autofill:hover,
input:-webkit-autofill:focus {
  -webkit-text-fill-color: var(--color-foreground);
  -webkit-box-shadow: 0 0 0 1000px var(--color-surface) inset;
  box-shadow: 0 0 0 1000px var(--color-surface) inset;
  transition: background-color 9999s ease-in-out 0s;
}

select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

.member-hint {
  display: block;
  margin: -4px 0 var(--space-3);
}

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

.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-2) var(--space-1) var(--space-1);
  border-radius: var(--radius-full);
  background: var(--color-muted);
  border: 1px solid var(--color-border);
  font-size: 0.875rem;
  font-weight: 500;
}

.avatar {
  display: inline-grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-full);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
}

.avatar-sm { width: 22px; height: 22px; font-size: 0.6875rem; }
.avatar-lg { width: 40px; height: 40px; font-size: 1rem; }

.chip-remove {
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: var(--radius-full);
  border: none;
  background: transparent;
  color: var(--color-muted-fg);
}
.chip-remove:hover { background: var(--color-negative-soft); color: var(--color-negative); }
.chip-remove svg { width: 14px; height: 14px; }

/* ===================== Expense form ===================== */
.expense-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.field { display: flex; flex-direction: column; gap: var(--space-2); }

.field label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-muted-fg);
}

.field-label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.checkbox-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: var(--space-2);
}

.check-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2);
  border-radius: var(--radius-md);
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
  transition: border-color var(--duration-fast) var(--ease-out), background-color var(--duration-fast) var(--ease-out);
  min-height: 44px;
}

.check-item.checked {
  border-color: var(--color-primary);
  background: var(--color-positive-soft);
}

.check-item input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--color-primary);
  flex-shrink: 0;
}

.check-item span {
  font-size: 0.875rem;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.form-actions {
  display: flex;
  gap: var(--space-2);
  justify-content: flex-end;
}

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

@media (min-width: 480px) {
  .form-actions .btn { flex: none; }
}

/* ===================== Expense list ===================== */
.expense-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.expense-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
  animation: fadeSlideIn var(--duration-base) var(--ease-out);
}

@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.expense-main { min-width: 0; flex: 1; }

.expense-name {
  font-weight: 600;
  font-size: 0.9375rem;
  margin-bottom: 2px;
}

.expense-amount {
  font-variant-numeric: tabular-nums;
  color: var(--color-primary);
  font-weight: 700;
  font-size: 0.9375rem;
}

.expense-meta {
  margin-top: var(--space-2);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-3);
  font-size: 0.8125rem;
  color: var(--color-muted-fg);
}

.expense-meta b { color: var(--color-foreground); font-weight: 600; }

.expense-actions {
  display: flex;
  gap: var(--space-1);
  flex-shrink: 0;
}

.expense-actions button {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-muted-fg);
}
.expense-actions button:hover { background: var(--color-muted); color: var(--color-foreground); }
.expense-actions button.danger:hover { background: var(--color-negative-soft); color: var(--color-negative); border-color: var(--color-negative-soft); }
.expense-actions svg { width: 17px; height: 17px; }

/* ===================== Summary grid ===================== */
.summary-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

@media (min-width: 560px) {
  .summary-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .summary-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1280px) {
  .summary-grid { grid-template-columns: repeat(3, 1fr); }
}

.summary-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  display: flex;
  gap: var(--space-3);
  align-items: center;
}

.summary-body { min-width: 0; flex: 1; }

.summary-name {
  font-weight: 700;
  font-size: 0.9375rem;
  margin-bottom: 4px;
}

.summary-rows {
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-size: 0.8125rem;
  color: var(--color-muted-fg);
}

.summary-rows span b {
  font-variant-numeric: tabular-nums;
  color: var(--color-foreground);
  font-weight: 600;
}

.summary-balance {
  margin-top: var(--space-2);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.summary-balance.owe { background: var(--color-negative-soft); color: var(--color-negative); }
.summary-balance.receive { background: var(--color-positive-soft); color: var(--color-positive); }
.summary-balance.settled { background: var(--color-muted); color: var(--color-muted-fg); }

/* ===================== Settlement ===================== */
.settlement-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.settlement-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-muted);
  flex-wrap: wrap;
}

.settlement-parties {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex: 1;
  min-width: 0;
  font-size: 0.875rem;
  font-weight: 600;
}

.settlement-parties .name-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.settlement-arrow {
  color: var(--color-muted-fg);
  flex-shrink: 0;
}

.settlement-amount {
  font-weight: 800;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.qr-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: var(--radius-full);
  border: 1px dashed var(--color-border);
  background: var(--color-surface);
  color: var(--color-primary);
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
}
.qr-btn:hover { background: var(--color-positive-soft); }
.qr-btn img { width: 22px; height: 22px; border-radius: 4px; object-fit: cover; }
.qr-btn svg { width: 16px; height: 16px; }

/* ===================== Detail table ===================== */
.table-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.table-actions {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.table-scroll {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  -webkit-overflow-scrolling: touch;
}

.detail-table {
  border-collapse: collapse;
  width: 100%;
  min-width: 640px;
  font-size: 0.8125rem;
}

.detail-table th, .detail-table td {
  padding: 10px 12px;
  text-align: right;
  white-space: nowrap;
  border-bottom: 1px solid var(--color-border);
  font-variant-numeric: tabular-nums;
}

.detail-table th:first-child, .detail-table td:first-child {
  text-align: left;
  position: sticky;
  left: 0;
  background: var(--color-surface);
  font-weight: 600;
  z-index: 1;
}

.detail-table thead th {
  background: var(--color-muted);
  font-weight: 700;
  color: var(--color-muted-fg);
  text-transform: none;
}

.detail-table thead th:first-child { background: var(--color-muted); }

.detail-table tbody tr:hover td { background: var(--color-muted); }
.detail-table tbody tr:hover td:first-child { background: var(--color-muted); }

.detail-table tfoot td, .detail-table tfoot th {
  font-weight: 700;
  border-top: 2px solid var(--color-border);
  border-bottom: none;
  background: var(--color-muted);
}

.detail-table .col-owe { color: var(--color-negative); font-weight: 700; }
.detail-table .col-receive { color: var(--color-positive); font-weight: 700; }

/* ===================== Modal ===================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  z-index: 100;
  animation: fadeIn var(--duration-fast) var(--ease-out);
}

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.modal {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  max-width: 360px;
  width: 100%;
  position: relative;
  box-shadow: var(--shadow-lg);
  text-align: center;
  animation: popIn var(--duration-base) var(--ease-out);
}

@keyframes popIn { from { opacity: 0; transform: scale(0.94) translateY(8px); } to { opacity: 1; transform: scale(1) translateY(0); } }

.modal h3 { font-size: 1.0625rem; margin-bottom: var(--space-4); }

.modal-close {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  border: none;
  background: var(--color-muted);
  color: var(--color-muted-fg);
  display: grid;
  place-items: center;
}
.modal-close svg { width: 16px; height: 16px; }

.modal-wide {
  max-width: 560px;
  text-align: left;
}

.history-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  max-height: 60vh;
  overflow-y: auto;
}

.history-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
  padding: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-muted);
}

.history-main { min-width: 0; flex: 1; }

.history-name {
  font-weight: 700;
  font-size: 0.9375rem;
  margin-bottom: 2px;
}

.history-meta {
  font-size: 0.8125rem;
  color: var(--color-muted-fg);
}

.history-actions {
  display: flex;
  gap: var(--space-2);
  flex-shrink: 0;
}

.sync-desc {
  display: block;
  margin-bottom: var(--space-4);
}

.sync-save-row {
  justify-content: flex-start;
  margin-bottom: var(--space-4);
}
.sync-save-row .btn { flex: none; }

.sync-status {
  display: block;
  margin-top: var(--space-3);
  min-height: 1.2em;
}

.qr-preview {
  min-height: 180px;
  border-radius: var(--radius-md);
  border: 1.5px dashed var(--color-border);
  display: grid;
  place-items: center;
  margin-bottom: var(--space-4);
  overflow: hidden;
  background: var(--color-muted);
}

.qr-preview img { width: 100%; max-width: 260px; display: block; }
.qr-preview .qr-placeholder { color: var(--color-muted-fg); font-size: 0.8125rem; padding: var(--space-4); }

.modal-actions {
  display: flex;
  gap: var(--space-2);
}
.modal-actions .btn { flex: 1; }

/* ===================== Toast ===================== */
.toast {
  position: fixed;
  bottom: var(--space-5);
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-foreground);
  color: var(--color-background);
  padding: 12px 20px;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  z-index: 200;
  animation: toastIn var(--duration-base) var(--ease-out);
  max-width: calc(100vw - 32px);
  text-align: center;
}

@keyframes toastIn {
  from { opacity: 0; transform: translate(-50%, 8px); }
  to { opacity: 1; transform: translate(-50%, 0); }
}

/* ===================== Footer ===================== */
.app-footer {
  text-align: center;
  color: var(--color-muted-fg);
  font-size: 0.75rem;
  padding-top: var(--space-6);
}