:root {
  --ink: #1f2937;
  --muted: #64748b;
  --line: #dbeafe;
  --panel: #ffffff;
  --soft: #f5fbff;
  --green: #38bdf8;
  --blue: #0ea5e9;
  --amber: #7dd3fc;
  --red: #e11d48;
  --shadow: 0 18px 50px rgba(14, 165, 233, 0.13);
  font-family: "Segoe UI", "Noto Sans TC", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  background: linear-gradient(180deg, #e0f2fe 0%, #f5fbff 52%, #ffffff 100%);
  color: var(--ink);
  margin: 0;
}

button,
input,
textarea,
select {
  font: inherit;
}

.topbar {
  align-items: center;
  backdrop-filter: blur(14px);
  background: rgba(255, 255, 255, 0.86);
  border-bottom: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  left: 0;
  padding: 0.9rem clamp(1rem, 4vw, 3rem);
  position: sticky;
  top: 0;
  z-index: 20;
}

.brand {
  color: var(--green);
  font-weight: 900;
  text-decoration: none;
}

nav {
  display: flex;
  gap: 1rem;
}

nav a {
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
}

.hero {
  align-items: stretch;
  background:
    linear-gradient(90deg, rgba(7, 89, 133, 0.5), rgba(14, 165, 233, 0.22)),
    url("assets/primer-prediction-hero.6622a496eb2e.png");
  background-position: center;
  background-size: cover;
  color: #fff;
  display: grid;
  gap: clamp(1rem, 4vw, 3rem);
  grid-template-columns: minmax(0, 1fr) minmax(300px, 380px);
  min-height: 480px;
  padding: clamp(2rem, 6vw, 5rem) clamp(1rem, 4vw, 3rem);
}

.hero-copy {
  align-self: center;
  max-width: 820px;
}

.hero p,
.workspace-head p,
.section-head p,
.panel-kicker {
  color: #075985;
  display: block;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  margin: 0 0 0.7rem;
  text-transform: uppercase;
}

.hero h1 {
  font-size: clamp(2.35rem, 6vw, 5rem);
  letter-spacing: 0;
  line-height: 1.02;
  margin: 0;
}

.hero p {
  color: #cffafe;
  font-size: 1rem;
}

.hero span {
  color: #e0f2fe;
  display: block;
  font-size: 1.08rem;
  line-height: 1.8;
  margin-top: 1.2rem;
  max-width: 760px;
}

.model-summary,
.primer-form,
.result-panel,
.records-section,
.model-validation {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.model-summary {
  align-self: center;
  color: var(--ink);
  padding: 1.35rem;
}

.model-summary h2,
.workspace-head h2,
.section-head h2 {
  margin: 0;
}

.model-summary p {
  color: var(--muted);
  font-size: 1rem;
  font-weight: 900;
  letter-spacing: 0;
  line-height: 1.7;
  margin: 0.8rem 0 1rem;
  text-transform: none;
}

.model-summary div {
  border-top: 1px solid var(--line);
  display: grid;
  gap: 0.25rem;
  padding: 0.8rem 0;
}

.model-summary strong {
  color: var(--green);
}

.model-summary span {
  color: var(--muted);
}

label {
  color: var(--muted);
  display: grid;
  font-size: 0.88rem;
  font-weight: 800;
  gap: 0.42rem;
  margin-top: 1rem;
}

input,
textarea,
select {
  background: #fff;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
  color: var(--ink);
  outline: none;
  padding: 0.72rem 0.78rem;
  width: 100%;
}

textarea {
  min-height: 92px;
  resize: vertical;
  text-transform: uppercase;
}

button {
  background: linear-gradient(135deg, var(--green), var(--blue));
  border: 0;
  border-radius: 6px;
  color: #fff;
  cursor: pointer;
  font-weight: 900;
  padding: 0.78rem 1rem;
}

button:hover {
  filter: brightness(0.96);
}

.ghost {
  background: #e0f2fe;
  color: #075985;
}

.workspace {
  margin: 0 auto;
  max-width: 1240px;
  padding: 2rem clamp(1rem, 4vw, 2rem) 4rem;
}

.workspace-head {
  align-items: center;
  display: flex;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.prediction-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: minmax(320px, 0.92fr) minmax(0, 1.2fr);
}

.primer-form,
.result-panel,
.records-section,
.model-validation {
  padding: 1.2rem;
}

.form-row,
.metric-grid {
  display: grid;
  gap: 0.8rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.button-row,
.records-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
}

.score-card {
  background: #e0f2fe;
  border: 1px solid #bae6fd;
  border-radius: 8px;
  padding: 1rem;
}

.score-card strong {
  display: block;
  font-size: clamp(2rem, 5vw, 3.8rem);
  line-height: 1;
  margin: 0.4rem 0;
}

.score-card[data-status="pass"] strong {
  color: var(--green);
}

.score-card[data-status="review"] strong {
  color: var(--amber);
}

.score-card[data-status="fail"] strong {
  color: var(--red);
}

.metric-grid {
  margin-top: 0.9rem;
}

.metric-grid div {
  background: #e0f2fe;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.8rem;
}

.metric-grid span,
.score-card span {
  color: var(--muted);
  display: block;
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

.metric-grid strong {
  display: block;
  margin-top: 0.25rem;
}

.feature-table {
  border-collapse: collapse;
  font-size: 0.92rem;
  margin-top: 1rem;
  width: 100%;
}

.feature-table th,
.feature-table td {
  border-bottom: 1px solid var(--line);
  padding: 0.68rem 0.45rem;
  text-align: left;
}

.feature-table th {
  color: var(--muted);
  font-size: 0.78rem;
  text-transform: uppercase;
}

.records-section,
.model-validation {
  margin-top: 1rem;
}

.section-head span {
  color: var(--muted);
  display: block;
  line-height: 1.7;
  margin-top: 0.55rem;
}

.best-model-card {
  background: #e0f2fe;
  border: 1px solid #bae6fd;
  border-radius: 8px;
  margin-top: 1rem;
  padding: 1rem;
}

.best-model-card span {
  color: var(--green);
  display: block;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.best-model-card strong {
  display: block;
  font-size: clamp(1.7rem, 4vw, 3rem);
  line-height: 1.05;
  margin-top: 0.35rem;
}

.best-model-card p {
  color: var(--muted);
  line-height: 1.7;
  margin: 0.7rem 0 0;
}

.model-table-wrap {
  border: 1px solid var(--line);
  border-radius: 8px;
  margin-top: 1rem;
  overflow: auto;
}

.model-table {
  border-collapse: collapse;
  font-size: 0.9rem;
  min-width: 900px;
  width: 100%;
}

.model-table th,
.model-table td {
  border-bottom: 1px solid var(--line);
  padding: 0.72rem 0.6rem;
  text-align: left;
  vertical-align: top;
}

.model-table th {
  background: #e0f2fe;
  color: var(--muted);
  font-size: 0.76rem;
  text-transform: uppercase;
}

.model-table tr:last-child td {
  border-bottom: 0;
}

.model-table tr.selected-model td {
  background: #ffffff;
}

.feature-importance {
  margin-top: 1rem;
}

.compact-head {
  margin-bottom: 0.75rem;
}

.feature-chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.feature-chip-list span {
  align-items: center;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink);
  display: inline-flex;
  font-weight: 800;
  gap: 0.45rem;
  padding: 0.5rem 0.72rem;
}

.feature-chip-list strong {
  color: var(--green);
}

.records-list {
  display: grid;
  gap: 0.75rem;
  margin-top: 1rem;
}

.record-card {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: grid;
  gap: 0.7rem;
  grid-template-columns: minmax(120px, 0.8fr) repeat(3, minmax(90px, 0.5fr)) minmax(160px, 1fr);
  padding: 0.85rem;
}

.record-card span {
  color: var(--muted);
  display: block;
  font-size: 0.75rem;
  font-weight: 900;
  text-transform: uppercase;
}

.record-card strong {
  display: block;
  margin-top: 0.2rem;
}

@media (max-width: 900px) {
  .topbar,
  .workspace-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.8rem;
  }

  .hero,
  .prediction-grid {
    grid-template-columns: 1fr;
  }

  .record-card {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 560px) {
  nav,
  .button-row,
  .records-actions {
    width: 100%;
  }

  nav {
    justify-content: space-between;
  }

  .form-row,
  .metric-grid,
  .record-card {
    grid-template-columns: 1fr;
  }
}