:root {
  --bg: #f5f4f1;
  --surface: #ffffff;
  --ink: #1f2420;
  --ink-soft: #55605a;
  --line: #dedad2;
  --accent: #8a3b2c;
  --accent-soft: #f1e3de;
  --risk: #a3372c;
  --radius: 10px;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: Georgia, serif; line-height: 1.5; }
header.app-header { border-bottom: 1px solid var(--line); background: var(--surface); padding: 18px 24px; display: flex; align-items: baseline; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
header.app-header h1 { font-size: 1.25rem; margin: 0; }
header.app-header .subtitle { color: var(--ink-soft); font-size: 0.85rem; }
nav.tabs { display: flex; gap: 4px; padding: 0 24px; border-bottom: 1px solid var(--line); background: var(--surface); overflow-x: auto; }
nav.tabs button { font-family: inherit; font-size: 0.92rem; padding: 12px 16px; border: none; background: none; color: var(--ink-soft); cursor: pointer; border-bottom: 2px solid transparent; white-space: nowrap; }
nav.tabs button.active { color: var(--accent); border-bottom-color: var(--accent); font-weight: 600; }
main { max-width: 880px; margin: 0 auto; padding: 28px 24px 80px; }
section.panel { display: none; }
section.panel.active { display: block; }
h2 { font-size: 1.15rem; margin: 0 0 4px; }
p.lede { color: var(--ink-soft); margin: 0 0 20px; font-size: 0.95rem; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px; margin-bottom: 16px; }
.stat-row { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 20px; }
.stat-tile { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 18px; min-width: 140px; }
.stat-tile .value { font-size: 1.6rem; color: var(--accent); }
.stat-tile .label { font-size: 0.78rem; color: var(--ink-soft); text-transform: uppercase; letter-spacing: 0.04em; }
.finding { border-left: 3px solid var(--accent); padding-left: 12px; margin-bottom: 14px; }
.finding .n { color: var(--ink-soft); font-size: 0.82rem; }
form.diagnose-form { display: grid; gap: 12px; }
.field label { display: block; font-size: 0.82rem; color: var(--ink-soft); margin-bottom: 4px; }
.field input, .field select, .field textarea { width: 100%; font-family: inherit; font-size: 0.95rem; padding: 9px 10px; border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--ink); }
.field textarea { min-height: 110px; resize: vertical; }
button.primary { font-family: inherit; font-size: 0.95rem; padding: 10px 18px; border: none; border-radius: 6px; background: var(--accent); color: white; cursor: pointer; justify-self: start; }
button.primary:disabled { opacity: 0.6; cursor: progress; }
.output { white-space: pre-wrap; font-size: 0.95rem; line-height: 1.6; }
.badge { display: inline-block; font-size: 0.72rem; padding: 2px 8px; border-radius: 999px; background: var(--accent-soft); color: var(--accent); margin-left: 8px; }
.error-box { border: 1px solid var(--risk); background: #fbeceb; color: var(--risk); padding: 10px 14px; border-radius: 6px; font-size: 0.88rem; margin-top: 10px; }
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 24px; }
.login-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 32px; width: 100%; max-width: 360px; }
.login-card h1 { font-size: 1.1rem; margin: 0 0 6px; }
.login-card p { color: var(--ink-soft); font-size: 0.88rem; margin: 0 0 18px; }
[hidden] { display: none !important; }

.field input[type="file"] {
  padding: 14px 10px;
  border-style: dashed;
  cursor: pointer;
}

.file-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.file-chip {
  font-size: 0.85rem;
  color: var(--ink-soft);
  background: var(--accent-soft);
  border-radius: 6px;
  padding: 6px 10px;
  width: fit-content;
}