:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --panel-2: #334155;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --accent-2: #818cf8;
  --good: #34d399;
  --border: #334155;
  --shadow: 0 10px 40px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: radial-gradient(1200px 800px at 10% -10%, #1e293b 0%, var(--bg) 60%);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
               Arial, "Noto Sans", sans-serif;
  min-height: 100vh;
}

header {
  padding: 40px 24px 16px;
  text-align: center;
}
header h1 {
  margin: 0;
  font-size: 2.2rem;
  letter-spacing: 0.5px;
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.tagline {
  color: var(--muted);
  margin-top: 6px;
}

main {
  max-width: 920px;
  margin: 0 auto;
  padding: 20px 24px 80px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.upload-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  box-shadow: var(--shadow);
  text-align: center;
}

.browse-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  border-radius: 12px;
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent-2) 100%);
  color: #0b1220;
  font-weight: 600;
  cursor: pointer;
  user-select: none;
  transition: transform 0.08s ease;
}
.browse-btn:hover { transform: translateY(-1px); }
.browse-btn .icon { font-size: 1.2em; }

.preview-wrap {
  margin-top: 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}
.preview-wrap.hidden { display: none; }
#preview {
  max-width: 100%;
  max-height: 360px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #0b1220;
}
.preview-actions {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
}
.file-name {
  color: var(--muted);
  font-size: 0.9rem;
  max-width: 300px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.primary-btn, .ghost-btn {
  padding: 10px 18px;
  border-radius: 10px;
  border: 1px solid transparent;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, opacity 0.15s ease;
}
.primary-btn {
  background: var(--good);
  color: #052e1f;
}
.primary-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
.ghost-btn {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}
.ghost-btn:hover { border-color: var(--muted); }

.status {
  margin-top: 14px;
  padding: 10px 14px;
  background: #0b1220;
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--muted);
}
.status.hidden { display: none; }
.status.error { color: #fecaca; border-color: #ef4444; }

.results { display: flex; flex-direction: column; gap: 16px; }
.results.hidden { display: none; }
.results h2 {
  margin: 14px 0 4px;
  font-size: 1.1rem;
  color: var(--muted);
  font-weight: 500;
}
.chart-controls {
  color: var(--muted);
  font-size: 0.9rem;
}
.chart-controls label {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  cursor: pointer;
}

.top-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px 24px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.top-label {
  color: var(--muted);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.top-breed {
  font-size: 1.8rem;
  font-weight: 700;
  text-transform: capitalize;
}
.top-confidence {
  color: var(--good);
  font-weight: 600;
}

.chart {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px;
  box-shadow: var(--shadow);
}
.bar-row {
  display: grid;
  grid-template-columns: 180px 1fr 60px;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
}
.bar-label {
  text-transform: capitalize;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.bar-track {
  position: relative;
  height: 10px;
  background: var(--panel-2);
  border-radius: 999px;
  overflow: hidden;
}
.bar-fill {
  position: absolute;
  inset: 0 auto 0 0;
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent-2) 100%);
  border-radius: 999px;
  transition: width 0.4s ease;
}
.bar-value {
  color: var(--muted);
  text-align: right;
  font-variant-numeric: tabular-nums;
}
.bar-row.top .bar-label { color: var(--good); font-weight: 600; }

footer {
  position: fixed;
  bottom: 8px;
  right: 12px;
  color: var(--muted);
  font-size: 0.75rem;
  opacity: 0.8;
}

@media (max-width: 560px) {
  .bar-row { grid-template-columns: 120px 1fr 52px; font-size: 0.8rem; }
  .top-breed { font-size: 1.4rem; }
}