:root {
  --bg: #0b0f0d;
  --surface: #131816;
  --surface-2: #1a211d;
  --line: #242d27;
  --line-soft: #1c231f;
  --ink: #e9eee9;
  --ink-dim: #93a096;
  --ink-faint: #5f6b63;
  --in: #3ed598;
  --in-dim: rgba(62, 213, 152, 0.14);
  --out: #f26d6d;
  --out-dim: rgba(242, 109, 109, 0.14);
  --radius: 14px;
  --font-ui: "Space Grotesk", system-ui, -apple-system, sans-serif;
  --font-money: "IBM Plex Mono", ui-monospace, "SF Mono", monospace;
}

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

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

body {
  font-family: var(--font-ui);
  background:
    radial-gradient(1200px 500px at 50% -10%, rgba(62, 213, 152, 0.05), transparent 60%),
    var(--bg);
  color: var(--ink);
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  justify-content: center;
  padding: 0 16px 48px;
  line-height: 1.45;
}

.app {
  width: 100%;
  max-width: 440px;
  padding-top: 20px;
}

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

.header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 0 4px 16px;
}

.brand {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

.brand::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--in);
  margin-right: 8px;
  vertical-align: 1px;
}

.date {
  font-family: var(--font-money);
  font-size: 12px;
  color: var(--ink-faint);
}

/* ---------- Ledger (balance hero) ---------- */

.ledger {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px 16px;
  overflow: hidden;
}

.ledger-rule {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 100%;
  background-image: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 23px,
    rgba(233, 238, 233, 0.035) 23px,
    rgba(233, 238, 233, 0.035) 24px
  );
  pointer-events: none;
}

.ledger-rule.bottom {
  top: auto;
  bottom: 0;
  height: 4px;
  background: repeating-linear-gradient(
    90deg,
    rgba(233, 238, 233, 0.08) 0 10px,
    transparent 10px 20px
  );
}

.eyebrow {
  position: relative;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 6px;
}

.balance {
  position: relative;
  font-family: var(--font-money);
  font-weight: 600;
  font-size: clamp(44px, 15vw, 60px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.delta {
  position: relative;
  font-family: var(--font-money);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  margin-top: 6px;
  min-height: 18px;
}

.delta .in { color: var(--in); }
.delta .out { color: var(--out); }
.delta .sep { color: var(--ink-faint); margin: 0 6px; }

/* ---------- Totals ---------- */

.totals {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 12px;
}

.stat {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.stat-value {
  font-family: var(--font-money);
  font-weight: 500;
  font-size: 19px;
  font-variant-numeric: tabular-nums;
}

.stat-in .stat-value { color: var(--in); }
.stat-out .stat-value { color: var(--out); }

/* ---------- Panel / form ---------- */

.panel {
  margin-top: 20px;
}

.section-title {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-dim);
  padding: 0 4px;
  margin-bottom: 12px;
}

.tx-form {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 7px;
  border: none;
  min-width: 0;
}

.field legend {
  font-size: 12px;
  font-weight: 500;
  color: var(--ink-dim);
  padding: 0;
  margin-bottom: 7px;
}

.field > label {
  font-size: 12px;
  font-weight: 500;
  color: var(--ink-dim);
}

.optional {
  color: var(--ink-faint);
  font-weight: 400;
}

.amount-wrap {
  display: flex;
  align-items: center;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0 14px;
  transition: border-color 0.15s;
}

.amount-wrap:focus-within {
  border-color: var(--in);
}

.currency {
  font-family: var(--font-money);
  font-size: 24px;
  color: var(--ink-faint);
  margin-right: 6px;
}

input[type="number"],
input[type="text"] {
  font-family: inherit;
  font-size: 16px;
  color: var(--ink);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 13px 14px;
  outline: none;
  width: 100%;
  transition: border-color 0.15s;
}

input[type="number"] {
  font-family: var(--font-money);
  font-size: 24px;
  font-variant-numeric: tabular-nums;
  border: none;
  background: transparent;
  padding: 12px 0;
}

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

input[type="number"]::placeholder,
input[type="text"]::placeholder {
  color: var(--ink-faint);
  opacity: 1;
}

input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

input[type="number"] {
  -moz-appearance: textfield;
  appearance: textfield;
}

/* ---------- Segmented direction ---------- */

.segmented {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.segment {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-dim);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 13px 8px;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
  -webkit-tap-highlight-color: transparent;
}

.seg-symbol {
  font-family: var(--font-money);
  font-size: 15px;
}

.seg-in.active {
  color: var(--in);
  background: var(--in-dim);
  border-color: rgba(62, 213, 152, 0.45);
}

.seg-out.active {
  color: var(--out);
  background: var(--out-dim);
  border-color: rgba(242, 109, 109, 0.45);
}

/* ---------- Form error + save ---------- */

.form-error {
  font-size: 13px;
  color: var(--out);
  background: var(--out-dim);
  border: 1px solid rgba(242, 109, 109, 0.35);
  border-radius: 10px;
  padding: 10px 12px;
}

.add-btn {
  font-family: var(--font-ui);
  font-size: 15px;
  font-weight: 600;
  color: #0b0f0d;
  background: var(--in);
  border: none;
  border-radius: 12px;
  padding: 15px 16px;
  cursor: pointer;
  transition: transform 0.05s, filter 0.15s, background 0.15s;
  -webkit-tap-highlight-color: transparent;
}

.add-btn:hover {
  filter: brightness(1.08);
}

.add-btn:active {
  transform: scale(0.99);
}

.add-btn:disabled {
  opacity: 0.55;
  cursor: default;
  filter: none;
}

.add-btn:focus-visible,
.segment:focus-visible,
input:focus-visible {
  outline: 2px solid var(--ink-dim);
  outline-offset: 2px;
}

/* ---------- History ---------- */

.history {
  margin-top: 24px;
}

.history-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 0 4px;
  margin-bottom: 12px;
}

.count {
  font-family: var(--font-money);
  font-size: 12px;
  color: var(--ink-faint);
}

.tx-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.tx {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 14px;
  animation: tx-in 0.25s ease both;
}

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

.tx-arrow {
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  font-family: var(--font-money);
  font-size: 16px;
  font-weight: 600;
}

.tx-in .tx-arrow {
  color: var(--in);
  background: var(--in-dim);
}

.tx-out .tx-arrow {
  color: var(--out);
  background: var(--out-dim);
}

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

.tx-note {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tx-time {
  font-family: var(--font-money);
  font-size: 11px;
  color: var(--ink-faint);
  margin-top: 2px;
  font-variant-numeric: tabular-nums;
}

.tx-amount {
  font-family: var(--font-money);
  font-size: 15px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.tx-in .tx-amount { color: var(--in); }
.tx-out .tx-amount { color: var(--out); }

.empty {
  text-align: center;
  color: var(--ink-dim);
  font-size: 14px;
  padding: 40px 20px;
  border: 1px dashed var(--line);
  border-radius: 12px;
}

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

.footer {
  text-align: center;
  margin-top: 28px;
  padding-bottom: 12px;
}

.footer p {
  font-size: 12px;
  color: var(--ink-faint);
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 20px;
  transform: translateX(-50%);
  background: var(--in);
  color: #0b0f0d;
  font-size: 14px;
  font-weight: 600;
  padding: 12px 18px;
  border-radius: 999px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
  z-index: 10;
  animation: toast-in 0.2s ease both;
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translate(-50%, 12px);
  }
  to {
    opacity: 1;
    transform: translate(-50%, 0);
  }
}

.loading {
  text-align: center;
  color: var(--ink-faint);
  font-size: 13px;
  padding: 32px 0;
  font-family: var(--font-money);
}

@media (prefers-reduced-motion: reduce) {
  .tx,
  .toast {
    animation: none;
  }
  * {
    transition-duration: 0.01ms !important;
  }
}