:root {
  color-scheme: light;
  --bg: #f3efe6;
  --glow: #fff8ec;
  --ink: #1c1915;
  --muted: #6d655c;
  --card: rgba(255, 253, 248, 0.46);
  --line: rgba(255, 255, 255, 0.72);
  --field: rgba(255, 255, 255, 0.42);
  --chip: rgba(255, 253, 248, 0.34);
  --highlight: rgba(255, 255, 255, 0.7);
  --blur: 18px;
  --blob-a: #b7e4cf;
  --blob-b: #f3c2ae;
  --blob-c: #efe3b8;
  --income: #1f7a4d;
  --income-soft: #e5f4eb;
  --expense: #c4522a;
  --expense-soft: #fde8e0;
  --accent: #243f38;
  --focus: #b7d2c6;
  --axis: #e4d9c8;
  --well-0: rgba(255, 253, 248, 0.2);
  --well-1: rgba(255, 253, 248, 0.38);
  --well-2: rgba(255, 255, 255, 0.62);
  --empty-0: rgba(244, 239, 230, 0.7);
  --empty-1: rgba(217, 208, 195, 0.85);
  --shadow: 0 16px 40px rgba(48, 36, 20, 0.1);
  --radius: 18px;
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #121614;
  --glow: #1c2b24;
  --ink: #f4efe6;
  --muted: #b7aea3;
  --card: rgba(24, 32, 29, 0.48);
  --line: rgba(255, 255, 255, 0.16);
  --field: rgba(12, 16, 15, 0.38);
  --chip: rgba(255, 255, 255, 0.06);
  --highlight: rgba(255, 255, 255, 0.14);
  --blur: 18px;
  --blob-a: #1d5a42;
  --blob-b: #7a3a28;
  --blob-c: #243f4a;
  --income: #49c784;
  --income-soft: #173528;
  --expense: #f09a74;
  --expense-soft: #3a221b;
  --accent: #2f6b56;
  --focus: #3d6e5c;
  --axis: #3c4642;
  --well-0: rgba(18, 22, 20, 0.15);
  --well-1: rgba(18, 22, 20, 0.32);
  --well-2: rgba(255, 255, 255, 0.08);
  --empty-0: rgba(58, 68, 64, 0.7);
  --empty-1: rgba(32, 40, 37, 0.9);
  --shadow: 0 18px 46px rgba(0, 0, 0, 0.38);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background-color: var(--bg);
  background-image:
    radial-gradient(circle at 8% -8%, var(--blob-a) 0, transparent 34rem),
    radial-gradient(circle at 100% 0%, var(--blob-b) 0, transparent 30rem),
    radial-gradient(circle at 72% 110%, var(--blob-c) 0, transparent 34rem);
  background-attachment: fixed;
  font-family: "Segoe UI", sans-serif;
}

button,
input,
select {
  font: inherit;
}

.app {
  width: min(1100px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1.5rem 0 3rem;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.eyebrow {
  margin: 0 0 0.25rem;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.75rem;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0;
  font-family: Palatino, "Palatino Linotype", Georgia, serif;
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 600;
}

h2 {
  margin-bottom: 1rem;
  font-size: 1.05rem;
}

.month-nav {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.month-label {
  min-width: 11rem;
  margin: 0;
  text-align: center;
  font-size: 1.05rem;
  text-transform: capitalize;
}

button {
  border: 0;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  padding: 0.65rem 1.1rem;
  cursor: pointer;
}

button:hover {
  filter: brightness(1.08);
}

.month-nav button {
  width: 2.4rem;
  height: 2.4rem;
  padding: 0;
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 1rem;
  padding: 0.35rem;
  border-radius: 18px;
}

.tab {
  position: relative;
  background: transparent;
  color: var(--ink);
  transform-style: preserve-3d;
}

.tab[aria-selected="true"] {
  background: var(--accent);
  color: #fff;
}

.tab.is-pressed {
  animation: tab-press 0.42s ease;
}

@keyframes tab-press {
  0% { transform: translate3d(0, 0, 0) scale(1); }
  40% { transform: translate3d(0, 3px, -12px) scale(0.94) rotateX(16deg); }
  100% { transform: translate3d(0, 0, 0) scale(1) rotateX(0); }
}

.tab-stage {
  position: relative;
  margin-bottom: 1rem;
  perspective: 1400px;
  --tab-dir: 1;
}

.tab-panel {
  display: none;
}

.tab-panel.is-active,
.tab-panel.is-leaving {
  display: block;
  transform-style: preserve-3d;
}

.tab-panel.is-active {
  animation: tab-in 0.55s cubic-bezier(0.16, 0.84, 0.32, 1);
}

.tab-panel.is-leaving {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  animation: tab-out 0.42s ease forwards;
  pointer-events: none;
}

@keyframes tab-in {
  from {
    opacity: 0;
    transform: translate3d(calc(var(--tab-dir) * 42px), 24px, -110px) rotateY(calc(var(--tab-dir) * -18deg)) rotateX(12deg);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes tab-out {
  from {
    opacity: 1;
    transform: none;
  }
  to {
    opacity: 0;
    transform: translate3d(calc(var(--tab-dir) * -36px), -18px, -140px) rotateY(calc(var(--tab-dir) * 16deg)) rotateX(-10deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .tab.is-pressed,
  .tab-panel.is-active,
  .tab-panel.is-leaving,
  .tab-panel.is-active .card,
  .tab-panel.is-active .tx-item {
    animation: none;
  }
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  perspective: 1100px;
}

.tab-panel.is-active .card,
.tab-panel.is-active .tx-item {
  animation: lift-3d 0.62s cubic-bezier(0.16, 0.84, 0.32, 1) both;
}

.tab-panel.is-active .card:nth-child(2),
.tab-panel.is-active .tx-item:nth-child(2) { animation-delay: 0.07s; }

.tab-panel.is-active .card:nth-child(3),
.tab-panel.is-active .tx-item:nth-child(3) { animation-delay: 0.14s; }

@keyframes lift-3d {
  from {
    opacity: 0;
    transform: translate3d(0, 28px, -50px) rotateX(34deg);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.card {
  padding: 1.1rem 1.2rem 1.2rem;
  transition: transform 0.3s ease;
}

.card:hover {
  transform: translateY(-6px) rotateX(8deg);
}

.tabs,
.card,
.panel,
.tx-item,
input,
select,
#cancel-btn,
.theme-switch button,
.tx-actions button {
  background: var(--card);
  border: 1px solid var(--line);
  box-shadow: var(--shadow), inset 0 1px 0 var(--highlight);
  backdrop-filter: blur(var(--blur)) saturate(1.45);
  -webkit-backdrop-filter: blur(var(--blur)) saturate(1.45);
}

.card,
.panel {
  border-radius: var(--radius);
}

.card-label {
  margin-bottom: 0.4rem;
  color: var(--muted);
}

.card-value {
  margin: 0;
  font-size: clamp(1.3rem, 2vw, 1.8rem);
  font-weight: 650;
}

.card-income .card-value { color: var(--income); }
.card-expense .card-value { color: var(--expense); }

.panel {
  padding: 1.1rem 1.2rem 1.2rem;
}

.chart {
  min-height: 220px;
  perspective: 900px;
  padding: 0.4rem 0 1rem;
}

.chart svg {
  display: block;
  width: 100%;
  height: auto;
  transform: rotateX(18deg) rotateZ(-1deg);
  transform-origin: 50% 85%;
  filter: drop-shadow(14px 22px 12px rgba(28, 25, 21, 0.18));
}

.chart-donut {
  display: grid;
  place-items: center;
  max-width: 420px;
  margin: 0 auto;
}

.chart-donut svg {
  overflow: visible;
  transform: rotateX(26deg);
  transform-origin: center;
}

.legend {
  display: flex;
  gap: 1rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.legend span::before {
  content: "";
  display: inline-block;
  width: 0.7rem;
  height: 0.7rem;
  margin-right: 0.4rem;
  border-radius: 99px;
  vertical-align: -1px;
}

.legend-income::before { background: var(--income); }
.legend-expense::before { background: var(--expense); }

.form {
  display: grid;
  gap: 0.75rem;
  align-content: start;
  max-width: 34rem;
}

label {
  display: grid;
  gap: 0.35rem;
  font-size: 0.92rem;
}

input,
select {
  width: 100%;
  border-radius: 12px;
  background: var(--field);
  padding: 0.7rem 0.8rem;
  color: var(--ink);
  box-shadow: inset 0 1px 0 var(--highlight);
}

input:focus,
select:focus {
  outline: 2px solid var(--focus);
  border-color: var(--accent);
}

.form-error {
  margin: 0;
  color: var(--expense);
  font-size: 0.9rem;
}

.form-actions {
  display: flex;
  gap: 0.6rem;
}

#cancel-btn {
  background: var(--field);
  color: var(--ink);
}

.tx-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.tx-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.35rem 0.8rem;
  padding: 0.75rem 0.8rem;
  border-radius: 14px;
  background: var(--chip);
  box-shadow: inset 0 1px 0 var(--highlight);
}

.tx-item.income { background: color-mix(in srgb, var(--income) 16%, var(--card)); }
.tx-item.expense { background: color-mix(in srgb, var(--expense) 16%, var(--card)); }

.tx-title {
  font-weight: 650;
}

.tx-meta {
  color: var(--muted);
  font-size: 0.85rem;
}

.tx-amount {
  font-weight: 650;
  text-align: right;
}

.tx-item.income .tx-amount { color: var(--income); }
.tx-item.expense .tx-amount { color: var(--expense); }

.tx-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.4rem;
}

.tx-actions button {
  padding: 0.35rem 0.7rem;
  font-size: 0.82rem;
  background: var(--field);
  color: var(--ink);
}

.empty {
  margin: 0;
  color: var(--muted);
}

.theme-switch {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.lang-switch {
  margin-top: 0.85rem;
}

.theme-switch button {
  background: var(--field);
  color: var(--ink);
}

.theme-switch button[aria-pressed="true"] {
  background: var(--accent);
  color: #fff;
  border-color: transparent;
}

.settings-form {
  display: grid;
  grid-template-columns: minmax(12rem, 18rem) auto;
  gap: 0.75rem;
  align-items: end;
  margin-top: 1rem;
}

.settings-note {
  grid-column: 1 / -1;
  margin: 0;
  color: var(--income);
}

@media (max-width: 800px) {
  .topbar,
  .cards,
  .settings-form {
    grid-template-columns: 1fr;
    display: grid;
  }

  .topbar {
    align-items: start;
  }

  .month-nav {
    justify-content: space-between;
  }
}