:root {
  --page-bg: 221 218 208;
  --paper: 231 240 230;
  --card-bg: 241 247 240;
  --paper-line: 163 199 178;
  --margin-line: 178 74 62;
  --ink: 32 46 38;
  --muted: 96 114 102;
  --income: 40 118 84;
  --expense: 168 55 45;

  --ease-out-expo: cubic-bezier(0.19, 1, 0.22, 1);
  --ease-out-quad: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2.5rem 1.25rem;
  background: rgb(var(--page-bg));
  color: rgb(var(--ink));
  font-family: 'Space Mono', ui-monospace, monospace;
}

.page {
  width: 100%;
  max-width: 420px;
  text-align: center;
}

.page-eyebrow {
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgb(var(--margin-line));
  font-weight: 500;
  margin-bottom: 0.35rem;
}

.page-title {
  font-family: 'Fraunces', serif;
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.page-lede {
  font-size: 0.85rem;
  color: rgb(var(--muted));
  margin-bottom: 1.5rem;
}

/* ---------- Book ---------- */
.book {
  position: relative;
  background: rgb(var(--paper));
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 30px 60px -30px rgb(20 24 20 / 0.45);
}

.book::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 46px;
  width: 1.5px;
  background: rgb(var(--margin-line) / 0.45);
  z-index: 0;
}

.book-head {
  position: relative;
  z-index: 1;
  padding: 1.5rem 1.25rem 1.25rem;
  text-align: center;
  background: rgb(var(--card-bg));
  border-bottom: 1px solid rgb(var(--paper-line) / 0.6);
}

.book-label {
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgb(var(--muted));
  margin-bottom: 0.3rem;
}

.balance {
  font-family: 'Fraunces', serif;
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 1rem;
  transition: color 250ms ease;
}

.balance.is-pulsing {
  animation: balance-pulse 500ms var(--ease-out-quad);
}

@keyframes balance-pulse {
  0% {
    transform: scale(1);
  }
  35% {
    transform: scale(1.06);
  }
  100% {
    transform: scale(1);
  }
}

@media (prefers-reduced-motion: reduce) {
  .balance.is-pulsing {
    animation: none;
  }
}

.stats {
  display: flex;
  justify-content: center;
  gap: 2rem;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.stat-label {
  font-size: 0.64rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgb(var(--muted));
}

.stat-value {
  font-weight: 700;
  font-size: 0.95rem;
}

.stat-income .stat-value {
  color: rgb(var(--income));
}

.stat-expense .stat-value {
  color: rgb(var(--expense));
}

/* ---------- Sheet / rows ---------- */
.sheet {
  position: relative;
  z-index: 1;
  min-height: 60px;
  max-height: 260px;
  overflow-y: auto;
  background-image: repeating-linear-gradient(
    0deg,
    rgb(var(--paper-line) / 0.35) 0px,
    rgb(var(--paper-line) / 0.35) 1px,
    transparent 1px,
    transparent 40px
  );
}

.rows {
  list-style: none;
}

.row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  min-height: 40px;
  padding: 0 1rem 0 1.25rem;
}

.row.is-entering {
  animation: row-in 300ms var(--ease-out-expo) both;
}

@keyframes row-in {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .row.is-entering {
    animation: none;
  }
}

.row-desc {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.85rem;
}

.row-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.row-amount {
  font-weight: 700;
  font-size: 0.85rem;
  white-space: nowrap;
}

.row.income .row-amount {
  color: rgb(var(--income));
}

.row.expense .row-amount {
  color: rgb(var(--expense));
}

.row-delete {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: none;
  color: rgb(var(--muted) / 0.5);
  font-size: 0.85rem;
  cursor: pointer;
  opacity: 0;
  transition:
    opacity 150ms ease,
    color 150ms ease;
}

.row:hover .row-delete,
.row-delete:focus-visible {
  opacity: 1;
}

.row-delete:hover {
  color: rgb(var(--expense));
}

.empty-note {
  padding: 1.5rem 1.25rem;
  font-size: 0.8rem;
  font-style: italic;
  color: rgb(var(--muted));
  text-align: center;
}

.empty-note.is-hidden {
  display: none;
}

/* ---------- Entry form ---------- */
.entry-form {
  position: relative;
  z-index: 1;
  padding: 1.1rem 1.25rem 1.25rem;
  background: rgb(var(--card-bg));
  border-top: 1px solid rgb(var(--paper-line) / 0.6);
}

.entry-row {
  display: flex;
  gap: 0.6rem;
  margin-bottom: 0.7rem;
}

.field input {
  width: 100%;
  padding: 0.55rem 0.7rem;
  font-family: 'Space Mono', monospace;
  font-size: 0.85rem;
  color: rgb(var(--ink));
  background: rgb(var(--paper));
  border: 1px solid rgb(var(--paper-line));
  border-radius: 6px;
  outline: none;
  transition: border-color 200ms ease;
}

.field-desc {
  flex: 1;
}

.field-amount {
  width: 110px;
}

.field input:focus {
  border-color: rgb(var(--margin-line) / 0.6);
}

.field input.is-invalid {
  border-color: rgb(var(--expense));
  animation: shake 380ms var(--ease-out-quad);
}

@keyframes shake {
  0%,
  100% {
    transform: translateX(0);
  }
  20% {
    transform: translateX(-5px);
  }
  40% {
    transform: translateX(4px);
  }
  60% {
    transform: translateX(-3px);
  }
  80% {
    transform: translateX(2px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .field input.is-invalid {
    animation: none;
  }
}

.entry-row-actions {
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0;
}

.kind-toggle {
  display: inline-flex;
  border: 1px solid rgb(var(--paper-line));
  border-radius: 999px;
  overflow: hidden;
}

.kind-btn {
  padding: 0.4rem 0.7rem;
  font-family: 'Space Mono', monospace;
  font-size: 0.72rem;
  font-weight: 500;
  color: rgb(var(--muted));
  background: none;
  border: none;
  cursor: pointer;
  transition:
    background-color 150ms ease,
    color 150ms ease;
}

.kind-btn[data-kind='income'].is-active {
  background: rgb(var(--income) / 0.14);
  color: rgb(var(--income));
}

.kind-btn[data-kind='expense'].is-active {
  background: rgb(var(--expense) / 0.14);
  color: rgb(var(--expense));
}

.record-btn {
  padding: 0.55rem 1rem;
  font-family: 'Space Mono', monospace;
  font-size: 0.78rem;
  font-weight: 700;
  color: rgb(var(--card-bg));
  background: rgb(var(--ink));
  border: none;
  border-radius: 999px;
  cursor: pointer;
  transition:
    transform 150ms var(--ease-out-quad),
    background-color 200ms ease;
}

.record-btn:hover {
  background: rgb(var(--margin-line));
}

.record-btn:active {
  transform: scale(0.97);
}

@media (max-width: 420px) {
  .entry-row-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 0.6rem;
  }

  .record-btn {
    width: 100%;
  }
}