:root {
  --paper: #FAF7F0;
  --paper-raised: #FFFFFF;
  --ink: #1E2A38;
  --ink-soft: #5B6672;
  --sage: #6B8F71;
  --sage-bg: #E7EEE6;
  --coral: #E4572E;
  --coral-bg: #FBE7E0;
  --gold: #C9962E;
  --line: #E4DFD1;
  --line-strong: #D5CEB9;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(30, 42, 56, 0.06), 0 6px 20px rgba(30, 42, 56, 0.06);
  --font-display: 'Space Grotesk', 'Segoe UI', sans-serif;
  --font-body: 'Inter', 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;
}

* { box-sizing: border-box; }

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

body {
  min-height: 100vh;
  padding-bottom: 96px;
}

.app {
  max-width: 640px;
  margin: 0 auto;
  padding: 20px 16px 40px;
}

/* ---------- Header ---------- */

.topbar {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 18px;
}

.topbar h1 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0;
}

.topbar .eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ---------- Receipt / summary card ---------- */

.receipt {
  background: var(--paper-raised);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px 22px 18px;
  position: relative;
  margin-bottom: 18px;
}

.receipt-torn {
  height: 12px;
  margin: 0 -0px 0;
  background-image:
    linear-gradient(135deg, var(--paper) 25%, transparent 25%),
    linear-gradient(225deg, var(--paper) 25%, transparent 25%);
  background-position: 0 0;
  background-size: 16px 16px;
  background-repeat: repeat-x;
  border-radius: 0 0 var(--radius) var(--radius);
}

.period-switch {
  display: flex;
  gap: 6px;
  margin-bottom: 16px;
}

.period-switch button {
  flex: 1;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink-soft);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  padding: 7px 10px;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.period-switch button.active {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.period-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.period-nav button {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink);
  font-size: 15px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.period-nav button:hover { border-color: var(--line-strong); }
.period-nav button:disabled { opacity: 0.35; cursor: default; }

.period-label {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-soft);
  text-align: center;
}

.amounts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 16px;
}

.amount-block .label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  margin-bottom: 4px;
}

.amount-block .value {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 500;
  letter-spacing: -0.01em;
}

.amount-block.remaining .value.negative { color: var(--coral); }
.amount-block.remaining .value.positive { color: var(--sage); }

.budget-edit-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--ink-soft);
  border-top: 1px dashed var(--line-strong);
  padding-top: 12px;
}

.budget-edit-row button.link {
  background: none;
  border: none;
  color: var(--gold);
  font-weight: 600;
  cursor: pointer;
  padding: 0;
  font-size: 12px;
  font-family: var(--font-body);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.progress-bar {
  height: 6px;
  border-radius: 999px;
  background: var(--line);
  overflow: hidden;
  margin-bottom: 14px;
}

.progress-bar-fill {
  height: 100%;
  background: var(--sage);
  border-radius: 999px;
  transition: width 0.3s ease;
}

.progress-bar-fill.over { background: var(--coral); }

/* ---------- Entries list ---------- */

.section-title {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  margin: 24px 0 10px 4px;
  color: var(--ink);
}

.day-group {
  margin-bottom: 4px;
}

.day-group .day-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 16px 0 6px 4px;
}

.entry-list {
  background: var(--paper-raised);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.entry-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px 16px;
  border-bottom: 1px dashed var(--line);
  cursor: default;
}

.entry-row:last-child { border-bottom: none; }

.entry-cat {
  font-weight: 500;
  font-size: 14.5px;
}

.entry-note {
  font-size: 12px;
  color: var(--ink-soft);
  margin-top: 1px;
}

.entry-leader {
  flex: 1;
  border-bottom: 1px dotted var(--line-strong);
  margin: 0 2px;
  height: 1px;
  transform: translateY(-3px);
}

.entry-price {
  font-family: var(--font-mono);
  font-size: 14.5px;
  font-weight: 500;
  white-space: nowrap;
}

.entry-delete {
  border: none;
  background: none;
  color: var(--ink-soft);
  cursor: pointer;
  font-size: 16px;
  padding: 4px;
  line-height: 1;
  opacity: 0.5;
  transition: opacity 0.15s ease;
}

.entry-delete:hover { opacity: 1; color: var(--coral); }

.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--ink-soft);
  background: var(--paper-raised);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.empty-state .big {
  font-family: var(--font-display);
  font-size: 16px;
  color: var(--ink);
  margin-bottom: 4px;
}

/* ---------- FAB ---------- */

.fab {
  position: fixed;
  right: 20px;
  bottom: 24px;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: var(--ink);
  color: var(--paper);
  font-size: 28px;
  border: none;
  box-shadow: 0 8px 24px rgba(30, 42, 56, 0.35);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 40;
  transition: transform 0.15s ease;
}

.fab:hover { transform: scale(1.05); }
.fab:active { transform: scale(0.96); }

/* ---------- Modal ---------- */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(30, 42, 56, 0.42);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  z-index: 50;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.modal {
  background: var(--paper-raised);
  width: 100%;
  max-width: 480px;
  border-radius: 20px 20px 0 0;
  padding: 20px 20px 28px;
  transform: translateY(24px);
  transition: transform 0.2s ease;
  max-height: 85vh;
  overflow-y: auto;
}

.modal-overlay.open .modal { transform: translateY(0); }

@media (min-width: 620px) {
  .modal-overlay { align-items: center; }
  .modal { border-radius: 20px; }
}

.modal-handle {
  width: 40px;
  height: 4px;
  background: var(--line-strong);
  border-radius: 999px;
  margin: 0 auto 16px;
}

.modal h2 {
  font-family: var(--font-display);
  font-size: 18px;
  margin: 0 0 16px;
}

.field {
  margin-bottom: 14px;
}

.field label {
  display: block;
  font-size: 12px;
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.field input, .field textarea {
  width: 100%;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  padding: 11px 12px;
  font-size: 15px;
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--ink);
}

.field input:focus, .field textarea:focus {
  outline: none;
  border-color: var(--gold);
}

.field.price input {
  font-family: var(--font-mono);
  font-size: 20px;
}

.category-search {
  position: relative;
}

.category-results {
  margin-top: 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  border: 1px solid var(--line-strong);
  background: var(--paper);
  padding: 7px 13px;
  border-radius: 999px;
  font-size: 13.5px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.chip:hover { border-color: var(--gold); }

.chip.selected {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.chip.create-new {
  border-style: dashed;
  color: var(--gold);
  border-color: var(--gold);
}

.selected-category-display {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--sage-bg);
  color: var(--sage);
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 600;
  margin-bottom: 10px;
}

.selected-category-display button {
  background: none;
  border: none;
  cursor: pointer;
  color: inherit;
  font-size: 13px;
  padding: 0;
  opacity: 0.7;
}

.modal-actions {
  display: flex;
  gap: 10px;
  margin-top: 18px;
}

.btn {
  flex: 1;
  padding: 13px;
  border-radius: 10px;
  border: none;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font-body);
}

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

.btn-primary:disabled {
  background: var(--line-strong);
  color: var(--ink-soft);
  cursor: not-allowed;
}

.btn-secondary {
  background: var(--paper);
  color: var(--ink-soft);
  border: 1px solid var(--line-strong);
}

.toast {
  position: fixed;
  bottom: 96px;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: var(--ink);
  color: var(--paper);
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 13px;
  opacity: 0;
  pointer-events: none;
  transition: all 0.2s ease;
  z-index: 60;
  white-space: nowrap;
}

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

@media (min-width: 640px) {
  .app { padding-top: 40px; }
  .fab { right: calc(50% - 320px + 20px); }
}