:root {
  --bg: #f5f6f2;
  --surface: #ffffff;
  --border: #dde1d6;
  --text: #22291f;
  --text-muted: #62705a;
  --accent: #2b7a3c;
  --accent-weak: #e6f2e8;
  --warn: #b8860b;
  --warn-weak: #fdf3dc;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14170f;
    --surface: #1d2318;
    --border: #33402c;
    --text: #e9ede4;
    --text-muted: #a3ad98;
    --accent: #63c179;
    --accent-weak: #22331f;
    --warn: #e0b23a;
    --warn-weak: #332a10;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
  line-height: 1.5;
}

.app-header {
  padding: 20px 16px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.app-header h1 { margin: 0 0 4px; font-size: 1.25rem; }
.app-header .subtitle { margin: 0; color: var(--text-muted); font-size: 0.85rem; }

.layout {
  display: flex;
  flex-direction: column;
  max-width: 900px;
  margin: 0 auto;
}
@media (min-width: 720px) {
  .layout { flex-direction: row; align-items: flex-start; }
}

.sidebar {
  width: 100%;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
}
@media (min-width: 720px) {
  .sidebar {
    width: 280px;
    flex-shrink: 0;
    border-bottom: none;
    border-right: 1px solid var(--border);
    position: sticky;
    top: 0;
    max-height: 100vh;
    overflow-y: auto;
  }
}

#search {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  font-size: 0.95rem;
  margin-bottom: 12px;
}

.crop-list .category-group { margin-bottom: 10px; }
.crop-list .category-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 4px 6px;
}
.crop-item {
  display: block;
  width: 100%;
  text-align: left;
  padding: 8px 10px;
  border: none;
  background: transparent;
  color: var(--text);
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.9rem;
}
.crop-item:hover { background: var(--accent-weak); }
.crop-item.active { background: var(--accent); color: #fff; }
.crop-item .sub { display: block; font-size: 0.75rem; color: var(--text-muted); }
.crop-item.active .sub { color: rgba(255,255,255,0.85); }

.detail { flex: 1; padding: 16px; min-width: 0; }
.empty-state { color: var(--text-muted); padding: 40px 0; text-align: center; }

.detail-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
}
.detail-meta { display: flex; gap: 8px; margin-bottom: 8px; }
.badge {
  display: inline-block;
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--accent-weak);
  color: var(--accent);
}
.badge.verified.unverified { background: var(--warn-weak); color: var(--warn); }

.crop-title { margin: 0 0 2px; font-size: 1.3rem; }
.guarantee-type { margin: 0; color: var(--text-muted); font-size: 0.85rem; }
.assessment-name { margin: 0 0 14px; font-weight: 600; }

.input-form {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-bottom: 14px;
}
@media (min-width: 480px) {
  .input-form { grid-template-columns: 1fr 1fr; }
}
.field { display: flex; flex-direction: column; gap: 4px; }
.field label { font-size: 0.82rem; color: var(--text-muted); }
.field input {
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 0.95rem;
}
.input-form .calc-btn {
  grid-column: 1 / -1;
  padding: 11px;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
}

.result-box {
  background: var(--accent-weak);
  border-radius: 10px;
  padding: 14px;
  margin-bottom: 16px;
}
.result-label { font-size: 0.85rem; color: var(--text-muted); }
.result-value { font-size: 1.6rem; font-weight: 700; color: var(--accent); }

.steps { margin-bottom: 16px; }
.step { padding: 8px 0; border-bottom: 1px dashed var(--border); font-size: 0.9rem; }
.step:last-child { border-bottom: none; }
.step .step-label { color: var(--text-muted); font-size: 0.8rem; }
.step .step-formula { font-family: ui-monospace, SFMono-Regular, monospace; }

.explanation h3 { font-size: 0.95rem; margin: 0 0 6px; }
.explanation-body p { margin: 0 0 8px; font-size: 0.9rem; color: var(--text); }

.source { margin-top: 14px; font-size: 0.78rem; color: var(--text-muted); border-top: 1px solid var(--border); padding-top: 10px; }

.error-msg { color: #c0392b; font-size: 0.85rem; margin-top: 8px; }