:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --panel-2: #273449;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #6366f1;
  --accent-2: #22c55e;
  --danger: #ef4444;
  --warn: #f59e0b;
  --border: #334155;
  --radius: 12px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Sarabun", "Noto Sans Thai", "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.hero {
  text-align: center;
  padding: 32px 16px 8px;
}
.hero h1 { margin: 0 0 8px; font-size: 1.8rem; }
.subtitle { color: var(--muted); margin: 0 auto; max-width: 720px; }
.subtitle strong { color: var(--text); }

.container {
  max-width: 920px;
  margin: 0 auto;
  padding: 16px 16px 48px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.upload-card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }

.dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 36px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s, background .15s;
  outline: none;
}
.dropzone:hover, .dropzone:focus { border-color: var(--accent); background: rgba(99,102,241,.06); }
.dropzone.dragover { border-color: var(--accent); background: rgba(99,102,241,.12); }
.drop-icon { font-size: 2rem; }
.drop-title { font-size: 1.1rem; margin: 8px 0 4px; }
.drop-sub { color: var(--muted); margin: 0; }
.drop-sub .link { color: var(--accent); text-decoration: underline; }
.drop-hint { color: var(--muted); font-size: .85rem; margin: 8px 0 0; }

.filelist { list-style: none; margin: 16px 0 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.filelist li {
  display: flex; align-items: center; justify-content: space-between;
  background: var(--panel-2); border: 1px solid var(--border); border-radius: 8px;
  padding: 8px 12px; font-size: .95rem;
}
.filelist .fname { display: flex; align-items: center; gap: 8px; }
.filelist .fsize { color: var(--muted); font-size: .85rem; }
.filelist .remove { background: none; border: none; color: var(--danger); cursor: pointer; font-size: 1.1rem; }

.actions { display: flex; gap: 12px; margin-top: 16px; }

.instruction-box { margin-top: 16px; }
.url-box { margin-top: 16px; }
#urls {
  width: 100%; border: 1px solid var(--border); border-radius: 8px;
  background: var(--panel-2); color: var(--text); padding: 10px 12px;
  font-family: inherit; font-size: .9rem; resize: vertical; min-height: 70px;
}
#urls:focus { outline: none; border-color: var(--accent); }
.instruction-label { display: block; font-weight: 600; margin-bottom: 6px; }
.instruction-hint { display: block; font-weight: 400; font-size: .8rem; color: var(--muted); margin-top: 2px; }
#instruction {
  width: 100%; border: 1px solid var(--border); border-radius: 8px;
  background: var(--panel-2); color: var(--text); padding: 10px 12px;
  font-family: inherit; font-size: .95rem; resize: vertical; min-height: 70px;
}
#instruction:focus { outline: none; border-color: var(--accent); }
.instruction-echo {
  margin: 8px 0 0; padding: 8px 12px; background: rgba(99,102,241,.08);
  border: 1px solid var(--border); border-radius: 8px; font-size: .9rem; color: var(--muted);
  white-space: pre-wrap;
}
.btn { border: none; border-radius: 8px; padding: 10px 18px; font-size: 1rem; cursor: pointer; font-family: inherit; }
.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover:not(:disabled) { background: #4f52e0; }
.btn-ghost { background: transparent; color: var(--muted); border: 1px solid var(--border); }
.btn-ghost:hover:not(:disabled) { color: var(--text); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-export { background: var(--accent-2); color: #052e16; }
.btn-export:hover:not(:disabled) { background: #16a34a; }

.progress-section, .results-section { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.progress-section h2, .results-section h2 { margin-top: 0; }

.progress-list { display: flex; flex-direction: column; gap: 10px; }
.progress-card { background: var(--panel-2); border-radius: 8px; padding: 10px 12px; border: 1px solid var(--border); }
.progress-card .pfname { font-weight: 600; margin-bottom: 6px; }
.steps { display: flex; flex-wrap: wrap; gap: 6px; }
.step {
  font-size: .8rem; padding: 3px 8px; border-radius: 999px;
  background: var(--panel); border: 1px solid var(--border); color: var(--muted);
}
.step.run { color: var(--warn); border-color: var(--warn); }
.step.ok { color: var(--accent-2); border-color: var(--accent-2); }
.step.fail { color: var(--danger); border-color: var(--danger); }

.results-list { display: flex; flex-direction: column; gap: 16px; }
.result-card { background: var(--panel-2); border: 1px solid var(--border); border-radius: 8px; padding: 16px; }
.result-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 12px; }
.result-head .rfname { font-weight: 600; }
.recommend { font-size: .9rem; padding: 4px 10px; border-radius: 999px; background: var(--panel); border: 1px solid var(--border); }
.recommend.high { color: var(--danger); border-color: var(--danger); }
.recommend.med { color: var(--warn); border-color: var(--warn); }
.recommend.low { color: var(--accent-2); border-color: var(--accent-2); }
.result-body { background: var(--bg); border-radius: 8px; padding: 16px; overflow-x: auto; }
.result-body h1 { font-size: 1.15rem; margin: 16px 0 8px; color: var(--accent); border-bottom: 1px solid var(--border); padding-bottom: 4px; }
.result-body h1:first-child { margin-top: 0; }
.result-body h2 { font-size: 1rem; margin: 12px 0 6px; }
.result-body p { margin: 6px 0; }
.result-body ul { margin: 6px 0; padding-left: 22px; }
.result-body li { margin: 3px 0; }
.result-body code { background: var(--panel); padding: 1px 5px; border-radius: 4px; font-size: .9em; }
.result-body strong { color: #fde68a; }

.error-card { background: rgba(239,68,68,.1); border: 1px solid var(--danger); border-radius: 8px; padding: 12px; color: #fecaca; }
.error-card .efname { font-weight: 600; }

.spinner { display: inline-block; width: 14px; height: 14px; border: 2px solid var(--muted); border-top-color: var(--accent); border-radius: 50%; animation: spin .8s linear infinite; vertical-align: middle; }
@keyframes spin { to { transform: rotate(360deg); } }

.footer { text-align: center; color: var(--muted); font-size: .8rem; padding: 16px; }