:root {
  --bg: #0d1117;
  --bg-card: #161b22;
  --bg-input: #1c2128;
  --border: #30363d;
  --text-main: #e6edf3;
  --text-muted: #7d8590;
  --primary: #4493f8;
  --radius: 10px;
  --c-booth: #38a169;
  --c-comm: #4493f8;
  --c-neutral: #d4a847;
}

[data-theme="light"] {
  --bg: #f6f8fa;
  --bg-card: #ffffff;
  --bg-input: #f0f2f5;
  --border: #d0d7de;
  --text-main: #1f2328;
  --text-muted: #656d76;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { background: var(--bg); color: var(--text-main); font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; font-size: 15px; line-height: 1.6; padding: 1.5rem 1rem 3rem; }
.tool-wrapper { max-width: 760px; margin: 0 auto; }

.tool-header { text-align: center; margin-bottom: 2rem; }
.tool-header__badge { display: inline-flex; align-items: center; gap: 0.4rem; background: rgba(68,147,248,0.1); border: 1px solid rgba(68,147,248,0.3); color: var(--primary); font-size: 0.75rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; padding: 0.3rem 0.8rem; border-radius: 20px; margin-bottom: 1rem; }
.tool-header h1 { font-size: 1.6rem; font-weight: 800; color: var(--text-main); margin-bottom: 0.5rem; }
.tool-header p { color: var(--text-muted); max-width: 560px; margin: 0 auto; font-size: 0.9rem; }

.calc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; align-items: start; }

.input-card, .results-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.5rem; }
.card-title { font-size: 1rem; font-weight: 700; color: var(--text-main); margin-bottom: 1.25rem; }

.input-section { margin-bottom: 1.25rem; }
.input-section-label { font-size: 0.73rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.07em; color: var(--text-muted); margin-bottom: 0.65rem; }
.field-row { display: flex; flex-direction: column; gap: 0.2rem; margin-bottom: 0.6rem; }
.field-row label { font-size: 0.8rem; color: var(--text-muted); }
.field-hint { font-size: 0.73rem; }
.input-field { background: var(--bg-input); border: 1px solid var(--border); border-radius: 8px; color: var(--text-main); font-size: 0.9rem; padding: 0.5rem 0.7rem; width: 100%; transition: border-color 0.15s; }
.input-field:focus { outline: none; border-color: var(--primary); }

.primary-btn { background: var(--primary); color: #fff; border: none; border-radius: 8px; padding: 0.65rem 1.5rem; font-size: 0.9rem; font-weight: 700; cursor: pointer; transition: opacity 0.15s; width: 100%; margin-top: 0.5rem; }
.primary-btn:hover { opacity: 0.88; }

.verdict-banner { border-radius: 8px; padding: 1rem 1.25rem; margin-bottom: 1rem; font-weight: 700; font-size: 1rem; }
.verdict-banner.booth  { background: rgba(56,161,105,0.12);  color: var(--c-booth); border-left: 3px solid var(--c-booth); }
.verdict-banner.comm   { background: rgba(68,147,248,0.12);  color: var(--c-comm); border-left: 3px solid var(--c-comm); }
.verdict-banner.equal  { background: rgba(212,168,71,0.12);  color: var(--c-neutral); border-left: 3px solid var(--c-neutral); }

.results-body { display: flex; flex-direction: column; gap: 0.65rem; margin-bottom: 1.25rem; }
.result-row { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 0.5rem; }
.result-label { font-size: 0.82rem; color: var(--text-muted); }
.result-value { font-size: 1rem; font-weight: 700; color: var(--text-main); }
.result-value.booth { color: var(--c-booth); }
.result-value.comm  { color: var(--c-comm); }
.result-divider { border-top: 1px solid var(--border); margin: 0.25rem 0; }

.breakeven-section { background: var(--bg-input); border: 1px solid var(--border); border-radius: 8px; padding: 0.85rem 1rem; }
.breakeven-label { font-size: 0.73rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-muted); margin-bottom: 0.2rem; }
.breakeven-value { font-size: 1.4rem; font-weight: 800; color: var(--text-main); }
.breakeven-sub { font-size: 0.75rem; color: var(--text-muted); margin-top: 0.2rem; }

@media (max-width: 600px) {
  .calc-grid { grid-template-columns: 1fr; }
}