:root {
  color-scheme: light;
  --bg: #f4f7f8;
  --surface: #ffffff;
  --surface-strong: #ffffff;
  --text: #202124;
  --muted: #667085;
  --line: #d5dde3;
  --accent: #0f766e;
  --accent-strong: #115e59;
  --danger: #b42318;
  --shadow: 0 18px 50px rgba(29, 28, 24, 0.12);
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #181a1b;
  --surface: #222526;
  --surface-strong: #2b2f31;
  --text: #f3f4f6;
  --muted: #b7bec8;
  --line: #3c4144;
  --accent: #2dd4bf;
  --accent-strong: #5eead4;
  --danger: #f97066;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(145deg, rgba(15, 118, 110, 0.13), transparent 34rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body.compact .topbar,
body.compact .side-grid,
body.compact .structured-form {
  display: none;
}

body.compact .app-shell {
  width: min(100% - 20px, 620px);
  padding: 12px 0;
}

button,
input,
select {
  font: inherit;
}

button,
select {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-strong);
  color: var(--text);
}

button {
  min-height: 44px;
  padding: 0 16px;
  cursor: pointer;
  font-weight: 700;
}

button[type="submit"] {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

button:not(:disabled):hover {
  border-color: var(--accent);
}

.ghost {
  min-height: 36px;
  padding: 0 10px;
  font-size: 0.9rem;
}

.app-shell {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0;
}

.topbar,
main,
.panel-head,
.button-row,
.input-row,
.topbar-actions {
  display: flex;
  gap: 12px;
}

.topbar {
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 28px;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 0;
  font-size: clamp(2rem, 5vw, 4.5rem);
  line-height: 1;
}

h2 {
  margin-bottom: 0;
  font-size: 1.05rem;
}

select {
  min-height: 40px;
  padding: 0 10px;
}

main {
  align-items: flex-start;
}

.converter-panel,
.list-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--surface) 90%, transparent);
  box-shadow: var(--shadow);
}

.converter-panel {
  flex: 1 1 640px;
  padding: 24px;
}

.side-grid {
  display: grid;
  flex: 0 0 340px;
  gap: 12px;
}

.list-panel {
  padding: 16px;
}

.panel-head {
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.status-pill {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 10px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
}

label {
  display: block;
  margin-bottom: 8px;
  font-weight: 800;
}

.input-row {
  align-items: stretch;
}

.structured-form {
  margin-top: 22px;
  border-top: 1px solid var(--line);
  padding-top: 20px;
}

.compact-head {
  margin-bottom: 12px;
}

.structured-grid {
  display: grid;
  grid-template-columns: minmax(90px, 0.8fr) minmax(150px, 1.2fr) minmax(150px, 1.2fr) auto;
  gap: 10px;
  align-items: end;
}

input {
  width: 100%;
  min-height: 58px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-strong);
  color: var(--text);
  padding: 0 16px;
  font-size: 1.2rem;
}

input:focus,
button:focus-visible,
select:focus {
  outline: 3px solid color-mix(in srgb, var(--accent) 35%, transparent);
  outline-offset: 2px;
}

.hint,
.detail-text,
.item-meta {
  color: var(--muted);
}

.hint {
  margin: 10px 0 0;
  font-size: 0.92rem;
}

.fun-toggle {
  display: flex;
  width: fit-content;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
  color: var(--muted);
  font-weight: 800;
}

.fun-toggle input {
  width: 18px;
  min-height: 18px;
  accent-color: var(--accent);
}

.assumptions-panel {
  margin-top: 14px;
  color: var(--muted);
}

.assumptions-panel summary {
  width: fit-content;
  cursor: pointer;
  font-weight: 800;
}

.assumptions-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(110px, 1fr));
  gap: 10px;
  margin-top: 12px;
}

.assumptions-grid label {
  margin: 0;
  color: var(--muted);
  font-size: 0.82rem;
}

.assumptions-grid input {
  min-height: 38px;
  margin-top: 4px;
  font-size: 0.95rem;
}

.result-box {
  margin-top: 24px;
  border-top: 1px solid var(--line);
  padding-top: 22px;
}

.result-text {
  margin-bottom: 8px;
  font-size: clamp(1.8rem, 5vw, 3.2rem);
  font-weight: 850;
  line-height: 1.08;
  overflow-wrap: anywhere;
}

.detail-text {
  min-height: 1.5em;
  margin-bottom: 18px;
}

.error {
  color: var(--danger);
}

.button-row {
  flex-wrap: wrap;
}

.qr-canvas {
  margin-top: 18px;
  width: 164px;
  height: 164px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  image-rendering: pixelated;
}

.item-list {
  display: grid;
  gap: 8px;
}

.empty {
  color: var(--muted);
  font-size: 0.92rem;
}

.item-row {
  display: grid;
  grid-template-columns: 1fr 40px;
  gap: 8px;
}

.item-button {
  width: 100%;
  min-height: 48px;
  text-align: left;
  font-weight: 700;
}

.remove-button {
  min-height: 48px;
  padding: 0;
  color: var(--danger);
  font-size: 1.25rem;
}

.item-meta {
  display: block;
  margin-top: 3px;
  font-size: 0.78rem;
  font-weight: 500;
}

@media (max-width: 840px) {
  .app-shell {
    width: min(100% - 20px, 680px);
    padding: 20px 0;
  }

  .topbar,
  main,
  .input-row,
  .assumptions-grid,
  .structured-grid {
    flex-direction: column;
  }

  .assumptions-grid,
  .structured-grid {
    display: flex;
  }

  .topbar {
    align-items: stretch;
  }

  .side-grid {
    width: 100%;
    flex-basis: auto;
  }
}