:root {
  --ink: #1c2333;
  --muted: #5b6472;
  --line: #d8dde5;
  --accent: #1d5fbf;
  --accent-dark: #144790;
  --bg: #f5f7fa;
  --card: #ffffff;
  --warn-bg: #fff8e6;
  --warn-border: #e8c766;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
}

.container {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  background: var(--accent-dark);
  color: #fff;
  padding: 28px 0 22px;
}
.site-header h1 { margin: 0 0 4px; font-size: 1.5rem; }
.subtitle { margin: 0; opacity: 0.85; font-size: 0.95rem; }

.site-nav { margin-top: 12px; display: flex; gap: 16px; flex-wrap: wrap; }
.site-nav a {
  color: #fff;
  opacity: 0.75;
  text-decoration: none;
  font-size: 0.88rem;
  border-bottom: 2px solid transparent;
  padding-bottom: 2px;
}
.site-nav a:hover { opacity: 1; }
.site-nav a[aria-current="page"] {
  opacity: 1;
  font-weight: 600;
  border-bottom-color: #fff;
}

.notice {
  background: var(--warn-bg);
  border: 1px solid var(--warn-border);
  border-radius: 8px;
  padding: 14px 16px;
  margin: 20px 0;
  font-size: 0.92rem;
}

fieldset {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 16px 18px 6px;
  margin: 16px 0;
}

legend {
  font-weight: 600;
  padding: 0 6px;
  color: var(--accent-dark);
}

label {
  display: block;
  margin-bottom: 12px;
  font-size: 0.92rem;
  color: var(--muted);
}

input, select, textarea {
  display: block;
  width: 100%;
  margin-top: 4px;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 0.98rem;
  color: var(--ink);
  background: #fff;
  font-family: inherit;
}

textarea { resize: vertical; }

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(29,95,191,0.15);
}

.row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0 14px;
}

.req { color: #c0392b; }

.checkbox-line {
  display: flex;
  align-items: center;
  gap: 8px;
}
.checkbox-line input { width: auto; margin: 0; }

.hidden { display: none; }

.actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 20px 0 8px;
}

button {
  padding: 11px 18px;
  border-radius: 8px;
  border: 1px solid var(--accent);
  font-size: 0.95rem;
  cursor: pointer;
  background: #fff;
  color: var(--accent-dark);
}

#btn-generate {
  background: var(--accent);
  color: #fff;
  font-weight: 600;
}
#btn-generate:hover { background: var(--accent-dark); }

#btn-clear {
  border-color: var(--line);
  color: var(--muted);
}

#status-msg {
  min-height: 1.2em;
  font-size: 0.9rem;
}
#status-msg.ok { color: #1a7f37; }
#status-msg.err { color: #c0392b; }

.hint {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 4px 0 10px;
}

#scan-fieldset {
  border-color: var(--accent);
}

.scan-card {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  flex-wrap: wrap;
  background: #f0f5fc;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 14px;
  margin-bottom: 10px;
  font-size: 0.9rem;
}

.scan-card-error {
  background: #fdecea;
  border-color: #e7b3ac;
  color: #8a1f11;
  display: block;
}

.scan-card-info { flex: 1 1 220px; line-height: 1.5; }

.scan-card-controls {
  display: flex;
  gap: 6px;
  align-items: center;
  flex-wrap: wrap;
}
.scan-card-controls select {
  width: auto;
  margin: 0;
}
.scan-card-controls button {
  padding: 7px 10px;
  font-size: 0.85rem;
}
.scan-card-remove {
  border-color: var(--line);
  color: var(--muted);
}
.scan-card-applied {
  font-size: 0.82rem;
  color: #1a7f37;
  flex-basis: 100%;
}

.feedback-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 14px;
  margin-bottom: 10px;
  background: #fbfcfe;
}

.feedback-vote-btn {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 8px 10px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-dark);
}
.feedback-vote-btn:disabled {
  cursor: default;
  opacity: 0.6;
  background: #f0f5fc;
}

.feedback-body { flex: 1 1 auto; min-width: 0; }

.feedback-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 12px;
  margin-bottom: 6px;
}
.feedback-badge-mau_moi { background: #e6f0fd; color: var(--accent-dark); }
.feedback-badge-loi_mau { background: #fdecea; color: #8a1f11; }
.feedback-badge-gop_y_khac { background: #eef1f5; color: var(--muted); }

.feedback-ten-mau { font-weight: 600; margin: 0 0 4px; }
.feedback-noidung { margin: 0 0 6px; white-space: pre-wrap; word-break: break-word; }
.feedback-meta { font-size: 0.8rem; color: var(--muted); margin: 0; }

.site-footer {
  margin-top: 30px;
  padding: 18px 0 40px;
  color: var(--muted);
  font-size: 0.82rem;
  text-align: center;
}