:root {
  --cardinal: #8c1515;
  --cardinal-dark: #6b1010;
  --gold: #d4af37;
  --gold-muted: #c5b358;
  --cream: #faf8f2;
  --text: #1a1a1a;
  --text-muted: #4a4a4a;
  --border: rgba(212, 175, 55, 0.45);
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.12);
  --radius: 10px;
  --font: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.55;
  color: var(--text);
  background: var(--cream);
}

a {
  color: var(--cardinal);
}

a:focus-visible,
.btn:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 2px;
}

.site-header {
  background: linear-gradient(135deg, var(--cardinal) 0%, var(--cardinal-dark) 100%);
  color: #fff;
  padding: 2.5rem 1.5rem 2rem;
  text-align: center;
  border-bottom: 4px solid var(--gold);
}

.site-header h1 {
  margin: 0 0 0.35rem;
  font-size: clamp(1.5rem, 4vw, 2.1rem);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.site-header .subtitle {
  margin: 0;
  font-size: 1.05rem;
  opacity: 0.92;
  color: var(--gold-muted);
}

main {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

section + section {
  margin-top: 2.5rem;
}

h2 {
  margin: 0 0 1rem;
  font-size: 1.35rem;
  color: var(--cardinal);
  border-bottom: 2px solid var(--gold);
  padding-bottom: 0.4rem;
}

.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem 1.35rem;
  margin-bottom: 1rem;
}

.card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
  color: var(--cardinal-dark);
}

.card .note {
  margin: 0 0 1rem;
  font-size: 0.92rem;
  color: var(--text-muted);
}

.card .note.partial {
  color: #7a4f00;
  background: #fff8e6;
  border-left: 3px solid var(--gold);
  padding: 0.5rem 0.75rem;
  border-radius: 4px;
}

.download-row,
.file-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem 1rem;
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid #eee;
}

.download-row:first-of-type,
.file-row:first-of-type {
  border-top: none;
  padding-top: 0;
  margin-top: 0;
}

.file-row .file-label {
  flex: 1 1 180px;
  font-weight: 600;
  min-width: 0;
}

.action-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.btn {
  display: inline-block;
  padding: 0.55rem 1rem;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.btn-primary {
  background: var(--cardinal);
  color: #fff;
  border-color: var(--cardinal);
}

.btn-primary:hover {
  background: var(--cardinal-dark);
  border-color: var(--cardinal-dark);
  color: #fff;
}

.btn-secondary {
  background: transparent;
  color: var(--cardinal);
  border-color: var(--gold-muted);
}

.btn-secondary:hover {
  background: #fff8e6;
  color: var(--cardinal-dark);
}

.btn-youtube {
  background: var(--gold);
  color: var(--cardinal-dark);
  border-color: var(--gold-muted);
}

.btn-youtube:hover {
  background: var(--gold-muted);
  color: #000;
}

.btn-disabled {
  background: #e8e8e8;
  color: #666;
  border: 2px solid #ccc;
  cursor: not-allowed;
}

.site-footer {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1.25rem 2.5rem;
  font-size: 0.88rem;
  color: var(--text-muted);
  text-align: center;
}

.error-banner {
  background: #fdecea;
  border: 1px solid #d32f2f;
  color: #7f1d1d;
  padding: 1rem 1.25rem;
  border-radius: var(--radius);
  margin-bottom: 1.5rem;
}

@media (max-width: 520px) {
  .action-group {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    text-align: center;
  }
}