/* style.css */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  background: #fff;
  color: #1a1a1a;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

/* Header */
header {
  text-align: center;
  padding: 3rem 1rem;
  border-bottom: 1px solid #e5e7eb;
}

h1 {
  font-size: 2.8rem;
  margin-bottom: 0.5rem;
  color: #111;
}

.tagline {
  font-size: 1.4rem;
  margin: 1rem 0;
  font-weight: 500;
}

.subtitle {
  color: #555;
  margin-bottom: 1.5rem;
}

.btn {
  display: inline-block;
  padding: 0.7rem 1.4rem;
  background: #2563eb;
  color: white;
  text-decoration: none;
  border-radius: 6px;
  font-weight: 600;
  transition: background 0.2s;
}

.btn:hover {
  background: #1d4ed8;
}

.btn.secondary {
  background: #6b7280;
}

.btn.secondary:hover {
  background: #4b5563;
}

/* Section */
section {
  margin: 3rem 0;
  text-align: center;
}

h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  color: #111;
}

/* Table */
.metrics {
  width: 100%;
  max-width: 600px;
  margin: 2rem auto;
  border-collapse: collapse;
  font-size: 1rem;
}

.metrics th,
.metrics td {
  padding: 0.75rem 1rem;
  border: 1px solid #d1d5db;
  text-align: left;
}

.metrics th {
  background: #f3f4f6;
  font-weight: 600;
}

.metrics tr:nth-child(even) {
  background: #f9fafb;
}

/* Plot */
.plot {
  max-width: 100%;
  margin: 2rem 0;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
}

/* Downloads */
.downloads {
  margin: 2rem 0;
}

.downloads .btn {
  margin: 0.4rem;
}


/* Footer */
footer {
  text-align: center;
  padding: 2rem 1rem;
  color: #666;
  font-size: 0.9rem;
  border-top: 1px solid #e5e7eb;
  margin-top: 3rem;
}

footer a {
  color: #2563eb;
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 640px) {
  h1 { font-size: 2.2rem; }
  .tagline { font-size: 1.2rem; }
  .metrics { font-size: 0.9rem; }
}