:root {
  --bg: #f7f4ef;
  --surface: #ffffff;
  --text: #2a231c;
  --muted: #6b5f52;
  --border: #e3dbcf;
  --accent: #a15c2a;
  --accent-contrast: #ffffff;
  --warning: #a13c2a;
  --warning-bg: #f7e6e0;
  --radius: 10px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17140f;
    --surface: #221d16;
    --text: #f1ece3;
    --muted: #b7a893;
    --border: #3a3226;
    --accent: #d98a4f;
    --accent-contrast: #1a1410;
    --warning: #e8987d;
    --warning-bg: #3a2018;
  }
}

* { box-sizing: border-box; }

html, body {
  overflow-x: hidden;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

#shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

#topbar {
  padding: 12px 16px;
  padding-top: calc(12px + env(safe-area-inset-top));
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

#topbar-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

#topbar h1 {
  font-size: 1.1rem;
  margin: 0;
}

#calc-select-label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

#calc-select {
  display: block;
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}

#unit-toggle {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
}

#unit-toggle button {
  border: none;
  background: transparent;
  color: var(--text);
  padding: 6px 14px;
  font-size: 0.85rem;
  cursor: pointer;
}

#unit-toggle button.active {
  background: var(--accent);
  color: var(--accent-contrast);
}

#app {
  flex: 1;
  padding: 16px;
  padding-bottom: calc(env(safe-area-inset-bottom) + 16px);
  max-width: 720px;
  margin: 0 auto;
  width: 100%;
}

/* Desktop / tablet: denser panel, wider dropdown doesn't need to stretch full-width */
@media (min-width: 900px) {
  #topbar-row, #calc-select {
    max-width: 960px;
    margin-left: auto;
    margin-right: auto;
  }

  #calc-select {
    max-width: 320px;
  }

  #app {
    max-width: 960px;
    padding: 24px 32px;
    padding-bottom: max(24px, env(safe-area-inset-bottom));
  }
}

/* Shared calculator UI bits */
.field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 14px;
  max-width: 320px;
}

.field label {
  font-size: 0.85rem;
  color: var(--muted);
}

.field input, .field select {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font-size: 1rem;
}

.field-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.calc-title {
  margin-top: 0;
}

.warn-flag {
  color: var(--warning);
  font-weight: 600;
  cursor: help;
  margin-left: 4px;
}

.warn-note {
  background: var(--warning-bg);
  color: var(--warning);
  border-radius: var(--radius);
  padding: 8px 12px;
  font-size: 0.82rem;
  margin-top: 10px;
  max-width: 640px;
}

.section-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 640px;
  margin-top: 20px;
}

.section-heading {
  margin: 0;
  font-size: 0.95rem;
  color: var(--muted);
}

.calc-note {
  font-size: 0.82rem;
  color: var(--muted);
  max-width: 60ch;
}

/* Bridge/Compensation: one card per string instead of a wide table, so phones
   never need to scroll sideways. The detail fields wrap via flexbox — on a
   phone-width screen that naturally lands as two rows (gauge+material, then
   pitch+compensation); on desktop there's room for all four in one row. */
.bc-cards {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 12px;
  max-width: 640px;
}

.bc-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  background: var(--surface);
}

.bc-card-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 4px 12px;
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.bc-card-label {
  font-weight: 600;
  min-width: 0;
}

.bc-card-total {
  font-weight: 700;
  min-width: 0;
}

.bc-card-fields {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  min-width: 0;
}

.bc-cell {
  flex: 1 1 120px;
  min-width: 0;
}

.bc-cell label {
  display: block;
  font-size: 0.72rem;
  color: var(--muted);
  margin-bottom: 3px;
}

.bc-cell input, .bc-cell select {
  width: 100%;
  min-width: 0;
  box-sizing: border-box;
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--text);
  font-size: 0.9rem;
}

.bc-pitch-row {
  display: flex;
  gap: 4px;
}

.bc-pitch-row select {
  flex: 1.4;
  min-width: 0;
}

.bc-pitch-row input {
  flex: 1;
  min-width: 0;
}

table.results {
  border-collapse: collapse;
  width: 100%;
  max-width: 640px;
  margin-top: 12px;
  font-size: 0.9rem;
  display: block;
  overflow-x: auto;
}

table.results th, table.results td {
  text-align: left;
  padding: 6px 10px;
  border-bottom: 1px solid var(--border);
}

table.results th {
  color: var(--muted);
  font-weight: 600;
}

.preset-buttons {
  display: flex;
  gap: 8px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.preset-buttons button {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 0.82rem;
  cursor: pointer;
}

.preset-buttons button.active {
  background: var(--accent);
  color: var(--accent-contrast);
  border-color: var(--accent);
}

.result-highlight {
  font-size: 1.4rem;
  font-weight: 700;
  margin: 8px 0;
}

/* Material / Note / Octave stay on one row even on narrower or wider-font
   renderers (Android's font pushed Octave onto its own line): Note and Octave
   are fixed-narrow, Material takes whatever's left. */
.field.field-material {
  flex: 1 1 140px;
  min-width: 0;
}

.field.field-note {
  flex: 0 0 auto;
  width: 80px;
}

.field.field-octave {
  flex: 0 0 auto;
  width: 68px;
}