:root {
  --ink: #16211f;
  --ink-soft: #4c5a57;
  --bg: #f4f6f5;
  --card-bg: #ffffff;
  --border: #dde3e0;
  --accent: #0f6f5c;
  --accent-dark: #0b5344;
  --accent-soft: #e5f3ef;
  --regime1: #1c8a4c;
  --regime1-bg: #e6f6ec;
  --regime2: #b8860a;
  --regime2-bg: #fbf3df;
  --regime3: #c4392b;
  --regime3-bg: #fbe9e7;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(20, 30, 28, 0.04), 0 6px 20px rgba(20, 30, 28, 0.06);
  font-size: 16px;
}

* { box-sizing: border-box; }

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

.topbar {
  background: linear-gradient(135deg, var(--accent-dark), var(--accent));
  padding: env(safe-area-inset-top, 0) 0 0 0;
}
.topbar-inner {
  max-width: 720px;
  margin: 0 auto;
  padding: 18px 20px;
}
.brand { display: flex; flex-direction: column; gap: 2px; }
.brand-mark {
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.02em;
}
.brand-sub {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.85);
}

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 20px 16px 40px;
}

.intro h1 {
  font-size: 1.35rem;
  line-height: 1.35;
  margin: 6px 0 10px;
}
.intro p {
  font-size: 0.95rem;
  color: var(--ink-soft);
  line-height: 1.55;
  margin: 0 0 20px;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
  margin-bottom: 18px;
}

.tabs {
  display: flex;
  gap: 6px;
  background: var(--bg);
  padding: 4px;
  border-radius: 10px;
  margin-bottom: 16px;
}
.tab {
  flex: 1;
  border: none;
  background: transparent;
  padding: 10px 8px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--ink-soft);
  border-radius: 8px;
  cursor: pointer;
  min-height: 40px;
}
.tab.active {
  background: var(--card-bg);
  color: var(--accent-dark);
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.tab-panel.hidden { display: none; }

.dropzone {
  display: block;
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 28px 16px;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s ease, background .15s ease;
}
.dropzone:active,
.dropzone.dragover {
  border-color: var(--accent);
  background: var(--accent-soft);
}
.dropzone-content svg { color: var(--accent); margin-bottom: 8px; }
.dropzone-content p {
  margin: 4px 0;
  font-size: 0.9rem;
  color: var(--ink-soft);
}
.file-name {
  font-weight: 600;
  color: var(--accent-dark) !important;
  word-break: break-all;
}

.field-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ink-soft);
  margin-bottom: 6px;
}
.text-input {
  width: 100%;
  padding: 12px 12px;
  font-size: 1rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
  color: var(--ink);
  min-height: 44px;
}
.text-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.hint {
  font-size: 0.78rem;
  color: var(--ink-soft);
  margin: 8px 0 0;
  line-height: 1.4;
}

.advanced {
  margin-top: 14px;
  border-top: 1px solid var(--border);
  padding-top: 10px;
}
.advanced summary {
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-dark);
  list-style: none;
  padding: 6px 0;
}
.advanced summary::-webkit-details-marker { display: none; }
.advanced summary::before { content: "▸ "; }
.advanced[open] summary::before { content: "▾ "; }
.advanced-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 10px 0 4px;
}
@media (max-width: 480px) {
  .advanced-grid { grid-template-columns: 1fr; }
}

.btn-primary {
  width: 100%;
  margin-top: 18px;
  padding: 14px;
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  background: var(--accent);
  border: none;
  border-radius: 12px;
  cursor: pointer;
  min-height: 48px;
}
.btn-primary:active { background: var(--accent-dark); }
.btn-primary:disabled { opacity: 0.55; }

.btn-secondary {
  flex: 1;
  padding: 12px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--accent-dark);
  background: var(--accent-soft);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  min-height: 44px;
}

.error-msg {
  margin-top: 12px;
  padding: 10px 12px;
  background: var(--regime3-bg);
  color: var(--regime3);
  border-radius: 10px;
  font-size: 0.88rem;
}
.hidden { display: none !important; }

/* ---- results ---- */
.regime-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  border-radius: 999px;
  margin-bottom: 12px;
  font-weight: 700;
}
.regime-badge.regime-1 { background: var(--regime1-bg); color: var(--regime1); }
.regime-badge.regime-2 { background: var(--regime2-bg); color: var(--regime2); }
.regime-badge.regime-3 { background: var(--regime3-bg); color: var(--regime3); }
.regime-roman {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: currentColor;
  font-size: 0.85rem;
  color: #fff !important;
}
.regime-text { font-size: 0.92rem; }

#resultProtein {
  font-size: 1.15rem;
  margin: 0 0 14px;
}

.descriptor-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 14px;
}
@media (max-width: 420px) {
  .descriptor-grid { grid-template-columns: 1fr 1fr; }
}
.descriptor-item {
  background: var(--bg);
  border-radius: 10px;
  padding: 10px 12px;
}
.descriptor-item .label {
  display: block;
  font-size: 0.72rem;
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-bottom: 2px;
}
.descriptor-item .value {
  font-size: 1.02rem;
  font-weight: 700;
}
.descriptor-item .source {
  display: block;
  font-size: 0.7rem;
  color: var(--ink-soft);
  margin-top: 2px;
}

.notes {
  background: var(--accent-soft);
  border-radius: 10px;
  padding: 12px 14px;
  margin-bottom: 16px;
}
.notes ul { margin: 0; padding-left: 18px; }
.notes li { font-size: 0.86rem; color: var(--ink); margin-bottom: 6px; line-height: 1.4; }
.notes li:last-child { margin-bottom: 0; }
.notes-empty { font-size: 0.86rem; color: var(--ink-soft); margin: 0; }

.result-actions {
  display: flex;
  gap: 10px;
}

.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 30px 0;
  color: var(--ink-soft);
  font-size: 0.9rem;
}
.spinner {
  width: 30px; height: 30px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.disclaimer {
  font-size: 0.78rem;
  color: var(--ink-soft);
  line-height: 1.5;
  padding: 0 4px;
}

.footer {
  text-align: center;
  font-size: 0.78rem;
  color: var(--ink-soft);
  padding: 18px 16px 32px;
}