:root {
  --ink: #10262b;
  --ink-soft: #4a6169;
  --bg: #f2f5f4;
  --card: #ffffff;
  --brand: #0e3a43;
  --brand-2: #14707f;
  --accent: #e8842c;
  --line: #dde5e4;
  --ok: #2e8b57;
  --warn: #d97a1a;
  --danger: #c93a3a;
  --radius: 14px;
}

* { box-sizing: border-box; }

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

.topbar {
  background: var(--brand);
  color: #fff;
  padding: 14px 18px calc(12px + env(safe-area-inset-top, 0px));
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.brand { font-size: 22px; font-weight: 800; letter-spacing: 0.2px; cursor: pointer; }
.brand-mark { color: var(--accent); margin-right: 2px; }
.brand-accent { color: #7fd4e0; }
.tagline { font-size: 12px; opacity: 0.75; }

#app { max-width: 560px; margin: 0 auto; padding: 16px 16px 32px; }
.screen { display: flex; flex-direction: column; gap: 16px; }

/* --- capture --- */
.photo-drop {
  display: block;
  background: var(--card);
  border: 2px dashed var(--line);
  border-radius: var(--radius);
  min-height: 220px;
  cursor: pointer;
  overflow: hidden;
  position: relative;
  text-align: center;
}
.photo-drop:active { border-color: var(--brand-2); }
#photo-placeholder { padding: 48px 16px; }
.photo-icon { font-size: 44px; }
.photo-cta { font-size: 18px; font-weight: 700; margin-top: 10px; }
.photo-sub { font-size: 13px; color: var(--ink-soft); margin-top: 4px; }
#photo-preview { width: 100%; max-height: 340px; object-fit: cover; display: block; }

.field-label { font-size: 14px; font-weight: 700; margin-bottom: 8px; }
.muted { color: var(--ink-soft); font-weight: 400; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink);
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 13px;
  cursor: pointer;
}
.chip.selected { background: var(--brand-2); border-color: var(--brand-2); color: #fff; font-weight: 700; }

textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
  font: inherit;
  font-size: 15px;
  background: var(--card);
  resize: vertical;
}
textarea:focus { outline: 2px solid var(--brand-2); border-color: transparent; }

.primary-btn {
  background: var(--accent);
  color: #fff;
  border: 0;
  border-radius: var(--radius);
  padding: 16px;
  font-size: 17px;
  font-weight: 800;
  cursor: pointer;
  width: 100%;
}
.primary-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.primary-btn:not(:disabled):active { transform: scale(0.99); }

.ghost-btn {
  background: none;
  border: 0;
  color: var(--brand-2);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  padding: 10px;
  width: 100%;
}

/* --- history --- */
.section-title { font-size: 15px; margin: 8px 0 4px; }
.history-item {
  display: flex;
  gap: 12px;
  align-items: center;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px;
  margin-bottom: 8px;
  cursor: pointer;
}
.history-item img { width: 54px; height: 54px; object-fit: cover; border-radius: 8px; background: var(--line); }
.history-title { font-size: 14px; font-weight: 700; }
.history-meta { font-size: 12px; color: var(--ink-soft); margin-top: 2px; }

/* --- loading --- */
.loader-wrap { text-align: center; padding: 40px 0; }
.scanner {
  width: 180px; height: 180px;
  margin: 0 auto 20px;
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
  background: var(--line);
}
.scanner img { width: 100%; height: 100%; object-fit: cover; }
.scan-line {
  position: absolute;
  left: 0; right: 0; height: 3px;
  background: var(--accent);
  box-shadow: 0 0 14px 3px rgba(232, 132, 44, 0.7);
  animation: scan 1.8s ease-in-out infinite;
  z-index: 2;
}
@keyframes scan { 0%, 100% { top: 8%; } 50% { top: 90%; } }
.loader-text { font-size: 15px; color: var(--ink-soft); }

/* --- questions --- */
.note-card {
  background: #e9f4f0;
  border-left: 4px solid var(--brand-2);
  border-radius: 8px;
  padding: 12px 14px;
  font-size: 14px;
}
.q-block { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; margin-bottom: 12px; }
.q-text { font-size: 15px; font-weight: 700; margin-bottom: 10px; }
.q-options { display: flex; flex-wrap: wrap; gap: 8px; }
.q-option {
  border: 1px solid var(--line);
  background: var(--bg);
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 13px;
  cursor: pointer;
}
.q-option.selected { background: var(--brand-2); border-color: var(--brand-2); color: #fff; font-weight: 700; }
.q-free { margin-top: 10px; width: 100%; border: 1px solid var(--line); border-radius: 8px; padding: 9px 12px; font: inherit; font-size: 14px; }

/* --- result --- */
#result-card { display: flex; flex-direction: column; gap: 12px; }
.result-photo { width: 100%; max-height: 220px; object-fit: cover; border-radius: var(--radius); }

.diag-head { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; }
.diag-title { font-size: 19px; font-weight: 800; line-height: 1.3; }
.badges { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.badge { font-size: 12px; font-weight: 700; border-radius: 999px; padding: 4px 10px; background: var(--bg); color: var(--ink-soft); }
.badge.diy { background: #e3f2e9; color: var(--ok); }
.badge.pro { background: #fdeaea; color: var(--danger); }
.badge.care { background: #fdf1e2; color: var(--warn); }

.severity { margin-top: 14px; }
.severity-top { display: flex; justify-content: space-between; font-size: 13px; font-weight: 700; margin-bottom: 6px; }
.severity-track { height: 10px; border-radius: 999px; background: var(--line); overflow: hidden; }
.severity-fill { height: 100%; border-radius: 999px; transition: width 0.6s ease; }

.warn-card {
  background: #fdeaea;
  border-left: 4px solid var(--danger);
  border-radius: 8px;
  padding: 12px 14px;
  font-size: 14px;
}
.warn-card ul { margin: 6px 0 0; padding-left: 18px; }

.info-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; }
.info-label { font-size: 11px; font-weight: 800; text-transform: uppercase; letter-spacing: 0.8px; color: var(--brand-2); margin-bottom: 5px; }
.info-body { font-size: 14.5px; line-height: 1.55; }
.info-body ul { margin: 4px 0 0; padding-left: 18px; }
.action-list { margin: 4px 0 0; padding-left: 22px; }
.action-list li { margin-bottom: 9px; padding-left: 4px; }
.evidence-list { display: grid; gap: 10px; }
.evidence-item { background: var(--bg); border-radius: 10px; padding: 11px 12px; }
.evidence-item strong { display: block; margin-bottom: 4px; }
.confirm-line { color: var(--brand-2); margin-top: 5px; font-weight: 650; }
.stop-card { background: #fff5e8; border: 1px solid #f2bb76; border-left: 4px solid var(--warn); border-radius: 10px; padding: 13px 14px; }
.stop-card ul { margin: 7px 0 0; padding-left: 18px; }
.cost { font-size: 17px; font-weight: 800; color: var(--brand); }

.result-actions { margin-top: 16px; display: flex; flex-direction: column; gap: 6px; }

.error-card {
  background: #fdeaea;
  border-left: 4px solid var(--danger);
  border-radius: 8px;
  padding: 12px 14px;
  font-size: 14px;
}

.disclaimer {
  max-width: 560px;
  margin: 0 auto;
  padding: 0 20px 28px;
  font-size: 11.5px;
  line-height: 1.5;
  color: var(--ink-soft);
  text-align: center;
}

@media (min-width: 600px) {
  .topbar { padding-left: calc(50% - 264px); padding-right: calc(50% - 264px); }
}

/* --- vision modes --- */
.mode-preview-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--brand-2);
  text-transform: uppercase;
  letter-spacing: 0.7px;
  margin-bottom: 6px;
  margin-top: 10px;
}
.mode-preview-img {
  width: 100%;
  max-height: 220px;
  object-fit: cover;
  border-radius: var(--radius);
  border: 2px solid var(--brand-2);
}