:root {
  --bg: #0f1117;
  --panel: #181b23;
  --accent: #38bdf8;
  --accent2: #22d3ee;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --border: #27303f;
  --success: #22c55e;
  --danger: #ef4444;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  line-height: 1.4;
}

header {
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(90deg, rgba(56,189,248,0.15), transparent);
}
header h1 { margin: 0; font-size: 1.8rem; }
.subtitle { color: var(--muted); font-size: 0.95rem; }

main { padding: 1.5rem 2rem; max-width: 1400px; margin: 0 auto; }

.upload-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}
.upload-card h2 { margin-top: 0; font-size: 1.15rem; }
.upload-card input[type=file] { margin-right: 0.75rem; }

button {
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  color: #0f1117;
  border: none;
  padding: 0.55rem 1rem;
  border-radius: 0.5rem;
  font-weight: 700;
  cursor: pointer;
}
button:disabled { opacity: 0.5; cursor: not-allowed; }

.msg { margin-top: 0.75rem; padding: 0.5rem 0.75rem; border-radius: 0.5rem; }
.msg.ok { background: rgba(34,197,94,0.15); color: var(--success); border: 1px solid rgba(34,197,94,0.3); }
.msg.err { background: rgba(239,68,68,0.15); color: var(--danger); border: 1px solid rgba(239,68,68,0.3); }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.stat-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 1rem;
  text-align: center;
}
.stat-label { color: var(--muted); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.05em; }
.stat-value { font-size: 2rem; font-weight: 800; margin-top: 0.25rem; color: var(--accent); }

.charts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.chart-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 1rem;
}
.chart-card.wide { grid-column: 1 / -1; }
.chart-card h3 { margin-top: 0; font-size: 1rem; color: var(--muted); }

canvas { max-height: 260px; }

.tables h3, .actions h3 { margin: 0 0 0.5rem; }
table {
  width: 100%;
  border-collapse: collapse;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  overflow: hidden;
}
th, td { padding: 0.6rem 0.8rem; text-align: left; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; font-size: 0.85rem; text-transform: uppercase; }
tr:last-child td { border-bottom: none; }
.url { word-break: break-all; font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; color: var(--accent2); }

.action-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.tag {
  background: rgba(56,189,248,0.12);
  color: var(--accent);
  border: 1px solid rgba(56,189,248,0.25);
  padding: 0.35rem 0.65rem;
  border-radius: 999px;
  font-size: 0.85rem;
}

.analyze {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 1.25rem;
  margin-top: 1.5rem;
}
.analyze-controls { display: flex; flex-wrap: wrap; gap: 1rem; align-items: center; margin-bottom: 1rem; }
.analyze-controls label { display: flex; align-items: center; gap: 0.5rem; color: var(--muted); }
.analyze-controls input, .analyze-controls select {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 0.4rem 0.6rem;
}

.analysis-result {
  background: #0b0d12;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 1rem;
  white-space: pre-wrap;
}
.analysis-result pre { margin: 0; font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; color: #c7d2e2; }

footer { text-align: center; padding: 2rem; color: var(--muted); }
footer a { color: var(--accent); }