/* ─── Reset & base ──────────────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg:          #f5f5f7;
  --surface:     #ffffff;
  --surface-2:   #f9f9fb;
  --border:      rgba(0, 0, 0, 0.08);
  --border-strong: rgba(0, 0, 0, 0.14);
  --text-primary: #1d1d1f;
  --text-2:      #3d3d3f;
  --text-muted:  #86868b;
  --accent:      #0071e3;
  --accent-hover:#0077ed;
  --accent-dim:  rgba(0, 113, 227, 0.1);

  /* confidence palette — muted, purposeful */
  --high-bg:     #e8f5f0;
  --high-border: #b2dece;
  --high-text:   #1a4a3a;
  --high-bar:    #34c98a;

  --med-bg:      #fff8e6;
  --med-border:  #f5d98c;
  --med-text:    #5c3d00;
  --med-bar:     #f5a623;

  --low-bg:      #fff2f2;
  --low-border:  #f5c0c0;
  --low-text:    #5c1a1a;
  --low-bar:     #ff5f5f;

  --radius-sm:   8px;
  --radius-md:   14px;
  --radius-lg:   20px;

  --shadow-card: 0 1px 3px rgba(0,0,0,0.06), 0 8px 24px rgba(0,0,0,0.05);
  --shadow-card-hover: 0 2px 6px rgba(0,0,0,0.08), 0 16px 40px rgba(0,0,0,0.08);
}

html { font-size: 15px; -webkit-font-smoothing: antialiased; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ─── Background mesh ───────────────────────────────────────────────────── */
.bg-mesh {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.mesh-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.35;
}

.blob-1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, #b3d9ff 0%, transparent 70%);
  top: -180px; right: -120px;
  animation: drift1 18s ease-in-out infinite alternate;
}

.blob-2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, #c9f0e4 0%, transparent 70%);
  bottom: 10%; left: -80px;
  animation: drift2 22s ease-in-out infinite alternate;
}

.blob-3 {
  width: 300px; height: 300px;
  background: radial-gradient(circle, #ddd6ff 0%, transparent 70%);
  top: 40%; right: 10%;
  animation: drift1 26s ease-in-out infinite alternate-reverse;
}

@keyframes drift1 {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(30px, 20px) scale(1.06); }
}
@keyframes drift2 {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(-20px, 30px) scale(1.04); }
}

/* ─── Layout ────────────────────────────────────────────────────────────── */
.layout {
  position: relative;
  z-index: 1;
  max-width: 780px;
  margin: 0 auto;
  padding: 48px 24px 80px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

/* ─── Header ────────────────────────────────────────────────────────────── */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-primary);
  text-decoration: none;
}

.logo-icon {
  width: 28px; height: 28px;
  color: var(--accent);
  flex-shrink: 0;
}

.logo-text {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.header-meta {
  display: flex;
  gap: 8px;
}

.badge {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 3px 10px;
}

/* ─── Hero ───────────────────────────────────────────────────────────────── */
.hero {
  padding: 8px 0 4px;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 2.8rem);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 1.12;
  color: var(--text-primary);
  margin-bottom: 14px;
}

.hero-sub {
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--text-muted);
  max-width: 520px;
  font-weight: 400;
}

/* ─── Card base ──────────────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.2s ease;
}

/* ─── Input card ─────────────────────────────────────────────────────────── */
.input-card {
  padding: 20px 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.card-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.char-count {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--text-muted);
  transition: color 0.2s;
}

.seq-textarea {
  width: 100%;
  min-height: 160px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface-2);
  padding: 14px 16px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--text-primary);
  resize: vertical;
  outline: none;
  transition: border-color 0.15s, background 0.15s;
}

.seq-textarea::placeholder { color: var(--text-muted); }

.seq-textarea:focus {
  border-color: var(--accent);
  background: var(--surface);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.input-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.input-hints {
  display: flex;
  gap: 6px;
}

.hint-tag {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 3px 8px;
}

/* ─── Predict button ─────────────────────────────────────────────────────── */
.btn-predict {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 10px 20px;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s, opacity 0.15s;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.btn-predict:hover  { background: var(--accent-hover); transform: translateY(-1px); }
.btn-predict:active { transform: translateY(0); }
.btn-predict:disabled { opacity: 0.55; cursor: not-allowed; transform: none; }

.btn-icon { font-size: 1rem; transition: transform 0.2s; }
.btn-predict:hover .btn-icon { transform: translateX(3px); }

.btn-predict.loading .btn-label::after {
  content: '…';
  animation: dots 1.2s steps(3, end) infinite;
}

@keyframes dots {
  0%, 100% { content: '.'; }
  33%       { content: '..'; }
  66%       { content: '...'; }
}

/* ─── Shake ──────────────────────────────────────────────────────────────── */
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-5px); }
  40%, 80% { transform: translateX(5px); }
}
.shake { animation: shake 0.35s ease; }

/* ─── Status bar ─────────────────────────────────────────────────────────── */
.status {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  color: var(--text-2);
  transition: opacity 0.2s;
}
.status.hidden  { display: none; }
.status.visible { display: flex; }

.err-msg { color: #c0392b; font-weight: 500; }

/* ─── Spinner ────────────────────────────────────────────────────────────── */
.spinner {
  width: 16px; height: 16px;
  border: 2px solid var(--border-strong);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ─── Results area ───────────────────────────────────────────────────────── */
.results-area {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

/* ─── Result card ────────────────────────────────────────────────────────── */
.result-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  animation: fadeUp 0.3s ease both;
  transition: box-shadow 0.2s;
}

.result-card:hover { box-shadow: var(--shadow-card-hover); }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
}

.result-header-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.seq-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
  font-family: 'JetBrains Mono', monospace;
}

.seq-len-pill {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--border);
  border-radius: 20px;
  padding: 2px 9px;
}

.result-stats {
  display: flex;
  gap: 6px;
}

.stat-chip {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--accent);
  background: var(--accent-dim);
  border-radius: 6px;
  padding: 2px 8px;
}

.stat-chip.muted {
  color: var(--text-muted);
  background: transparent;
  border: 1px solid var(--border);
}

/* ─── Prediction list ────────────────────────────────────────────────────── */
.pred-list {
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.no-preds {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.875rem;
  padding: 24px 0 18px;
}

.pred-row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: transform 0.15s, box-shadow 0.15s;
  cursor: default;
}

.pred-row:hover {
  transform: translateX(2px);
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

/* Confidence-specific row backgrounds */
.pred-row.conf-high {
  background: var(--high-bg);
  border-color: var(--high-border);
}
.pred-row.conf-med {
  background: var(--med-bg);
  border-color: var(--med-border);
}
.pred-row.conf-low {
  background: var(--low-bg);
  border-color: var(--low-border);
}

.pred-main {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.pred-name {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.pred-goid {
  font-size: 0.72rem;
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-muted);
}

.pred-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
  flex-shrink: 0;
  min-width: 80px;
}

.pred-conf-label {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.conf-high .pred-conf-label { color: var(--high-text); }
.conf-med  .pred-conf-label { color: var(--med-text); }
.conf-low  .pred-conf-label { color: var(--low-text); }

.pred-prob {
  font-size: 0.875rem;
  font-weight: 600;
  font-family: 'JetBrains Mono', monospace;
}

.conf-high .pred-prob { color: var(--high-text); }
.conf-med  .pred-prob { color: var(--med-text); }
.conf-low  .pred-prob { color: var(--low-text); }

/* ─── Probability bar ────────────────────────────────────────────────────── */
.prob-bar-wrap {
  width: 72px;
  height: 4px;
  background: rgba(0,0,0,0.08);
  border-radius: 2px;
  overflow: hidden;
}

.prob-bar-fill {
  height: 100%;
  border-radius: 2px;
  transition: width 0.4s ease;
}

.prob-bar-fill.conf-high { background: var(--high-bar); }
.prob-bar-fill.conf-med  { background: var(--med-bar); }
.prob-bar-fill.conf-low  { background: var(--low-bar); }

/* ─── Error card ─────────────────────────────────────────────────────────── */
.error-card { background: var(--low-bg); border-color: var(--low-border); }
.seq-error {
  font-size: 0.8rem;
  color: #c0392b;
  font-weight: 500;
}

/* ─── Empty state ────────────────────────────────────────────────────────── */
.empty-state {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  padding: 32px;
}

/* ─── Responsive ─────────────────────────────────────────────────────────── */
@media (max-width: 540px) {
  .layout { padding: 32px 16px 60px; gap: 20px; }
  .hero-title { font-size: 1.8rem; }
  .pred-row { grid-template-columns: 1fr; }
  .pred-right { flex-direction: row; align-items: center; justify-content: flex-start; }
  .prob-bar-wrap { width: 60px; }
  .input-footer { flex-direction: column; align-items: flex-start; }
  .btn-predict { width: 100%; justify-content: center; }
}