:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #14141f;
  --bg-tertiary: #1e1e2e;
  --text-primary: #ffffff;
  --text-secondary: #a0a0b0;
  --text-muted: #606070;
  --accent: #00d4ff;
  --accent-secondary: #00ff88;
  --danger: #ff4466;
  --focus-ring: #00d4ff;
  --focus-glow: rgba(0, 212, 255, 0.4);
  --radius-md: 12px;
}

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

html, body {
  width: 600px; height: 600px; overflow: hidden;
  background: #000;
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-feature-settings: 'tnum' 1;
}

#app { width: 100%; height: 100%; position: relative; }

.screen {
  width: 100%; height: 100%;
  position: absolute; top: 0; left: 0;
  display: flex; flex-direction: column;
}
.screen.hidden { display: none; }

.focusable {
  transition: all 0.15s ease;
  border: 2px solid transparent;
  cursor: pointer;
  outline: none;
}
.focusable:focus {
  border-color: var(--focus-ring);
  box-shadow: 0 0 20px var(--focus-glow);
}
.hidden { display: none !important; }

/* Header */
.header {
  padding: 14px 24px 10px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  background: var(--bg-primary);
  border-bottom: 1px solid rgba(160,160,176,0.08);
}
.title {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.3px;
}
.hint {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1.5px;
}

/* ---- Home ---- */
.hero {
  padding: 14px 24px 6px;
  text-align: center;
}
.net-amount {
  font-size: 68px;
  font-weight: 700;
  color: var(--accent-secondary);
  line-height: 1;
  letter-spacing: -2.5px;
  font-variant-numeric: tabular-nums;
}
.net-amount .unit {
  font-size: 30px;
  color: var(--text-secondary);
  margin-left: 8px;
  font-weight: 500;
  letter-spacing: 0;
}
.net-label {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 6px;
  text-transform: uppercase;
  letter-spacing: 2.5px;
  font-weight: 500;
}

.breakdown {
  margin: 14px 24px 0;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.breakdown .row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 15px;
  padding: 3px 0;
}
.breakdown .row > span:first-child {
  color: var(--text-secondary);
}
.breakdown .row > span:last-child {
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
  font-weight: 500;
}
.breakdown .row.total {
  padding-bottom: 8px;
  margin-bottom: 4px;
  border-bottom: 1px solid rgba(160,160,176,0.12);
  font-size: 16px;
}
.breakdown .row.total > span:first-child {
  color: var(--text-primary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 12px;
}
.breakdown .row.total > span:last-child {
  color: var(--accent);
  font-size: 18px;
  font-weight: 700;
}
.breakdown .row.deduct > span:last-child {
  color: var(--danger);
}

.actions {
  position: absolute;
  bottom: 16px;
  left: 24px;
  right: 24px;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 10px;
}
.actions.single { grid-template-columns: 1fr; }
.btn {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 12px 10px;
  min-height: 88px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
}
.btn.primary { background: var(--bg-tertiary); min-height: 70px; }
.btn-icon {
  font-size: 22px;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: -1px;
}
.btn-label {
  font-size: 14px;
  color: var(--text-primary);
  font-weight: 500;
  letter-spacing: 0.3px;
}

/* ---- Adjust ---- */
.adjust-display {
  padding: 26px 24px 14px;
  text-align: center;
}
.adjust-value {
  font-size: 60px;
  font-weight: 700;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  letter-spacing: -2px;
  line-height: 1;
}
.adjust-net {
  font-size: 16px;
  color: var(--text-secondary);
  margin-top: 12px;
  font-variant-numeric: tabular-nums;
}
.adjust-net span {
  color: var(--accent-secondary);
  font-weight: 600;
}

.step-grid {
  margin: 14px 24px 10px;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 8px;
}
.step-btn {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 14px 4px;
  text-align: center;
  font-size: 17px;
  font-weight: 600;
  color: var(--text-primary);
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-variant-numeric: tabular-nums;
}

.presets {
  margin: 0 24px 12px;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 8px;
}
.preset {
  background: var(--bg-primary);
  border-radius: var(--radius-md);
  padding: 12px 4px;
  text-align: center;
  font-size: 14px;
  color: var(--text-secondary);
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-variant-numeric: tabular-nums;
}

/* ---- PPK list ---- */
.list {
  flex: 1;
  padding: 12px 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.list-item {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  font-size: 16px;
  color: var(--text-primary);
  min-height: 56px;
  display: flex;
  align-items: center;
  font-weight: 500;
}
.list-item.active {
  background: var(--bg-tertiary);
  color: var(--accent);
}
.list-item.active::after {
  content: '✓';
  margin-left: auto;
  color: var(--accent-secondary);
  font-size: 20px;
  font-weight: 700;
}

/* ---- Settings ---- */
.settings-list {
  flex: 1;
  padding: 12px 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.setting {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 10px 18px;
  min-height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.setting-info { flex: 1; min-width: 0; }
.setting-name {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-primary);
}
.setting-desc {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}
.toggle {
  width: 44px;
  height: 24px;
  background: var(--bg-tertiary);
  border-radius: 12px;
  position: relative;
  flex-shrink: 0;
}
.toggle::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  background: var(--text-secondary);
  border-radius: 9px;
  transition: all 0.2s ease;
}
.toggle.on { background: var(--accent); }
.toggle.on::after {
  left: 23px;
  background: #fff;
}