:root {
  color-scheme: light;
  --bg: #f6f7fb;
  --surface: #ffffff;
  --text: #1c2333;
  --muted: #5b6478;
  --brand: #2b5bff;
  --brand-soft: #ebf0ff;
  --border: #dce2f0;
  --success: #116d3b;
  --shadow: 0 8px 24px rgba(17, 35, 71, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  line-height: 1.5;
  background: var(--bg);
  color: var(--text);
}

.container {
  width: min(1080px, 92vw);
  margin: 0 auto;
}

.site-header {
  background: linear-gradient(120deg, #1b3b9a, #2b5bff);
  color: #fff;
  padding: 2rem 0 1.5rem;
  margin-bottom: 1rem;
}

.site-header h1 {
  margin: 0 0 0.5rem;
}

.intro {
  margin: 0;
  max-width: 70ch;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 1.25rem;
  margin-bottom: 1rem;
}

.muted {
  color: var(--muted);
  margin-top: 0.25rem;
}

.printer-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.85rem;
  margin-top: 1rem;
}

.printer-option {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
  background: #fff;
  color: var(--text);
  font-weight: 400;
  cursor: pointer;
  text-align: left;
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.printer-option:hover {
  transform: translateY(-1px);
  border-color: var(--brand);
}

.printer-option strong {
  display: block;
  font-size: 1rem;
}

.printer-option small {
  color: var(--muted);
}

.guide-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.5rem 1rem;
  flex-wrap: wrap;
}

.progress-wrap {
  margin-top: 1rem;
}

.progress-wrap label {
  font-weight: 700;
  display: block;
  margin-bottom: 0.35rem;
}

progress {
  width: 100%;
  height: 16px;
}

.step-card {
  margin-top: 1rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
  background: #fff;
}

.step-badge {
  display: inline-block;
  background: var(--brand-soft);
  color: #1b3b9a;
  border-radius: 999px;
  padding: 0.2rem 0.6rem;
  font-weight: 700;
  font-size: 0.85rem;
}

.step-text {
  margin: 0.65rem 0 0.9rem;
}

.step-image {
  width: 100%;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #f3f6ff;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.step-image-note {
  font-size: 0.9rem;
  color: var(--muted);
  margin: 0.45rem 0 0;
}

.step-controls {
  margin-top: 1rem;
  display: flex;
  gap: 0.65rem;
  justify-content: flex-end;
}

button {
  border: none;
  border-radius: 10px;
  padding: 0.7rem 1rem;
  background: var(--brand);
  color: #fff;
  cursor: pointer;
  font-weight: 700;
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

button.secondary {
  background: #fff;
  color: #2441a4;
  border: 1px solid #b8c4e8;
}

.extras-panel {
  margin-top: 1rem;
  display: grid;
  gap: 1rem;
}

.info-panel {
  background: #fbfcff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.9rem 1rem;
}

.info-panel h3 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
}

.info-panel ul,
.info-panel ol {
  margin: 0;
  padding-left: 1.2rem;
}

.info-panel table {
  width: 100%;
  border-collapse: collapse;
}

.info-panel th,
.info-panel td {
  text-align: left;
  border-bottom: 1px solid var(--border);
  padding: 0.35rem 0.4rem;
}

.status-ok {
  color: var(--success);
  font-weight: 700;
}

.site-footer {
  padding: 0.25rem 0 1.5rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.hidden {
  display: none;
}

@media (max-width: 640px) {
  .step-controls {
    justify-content: stretch;
  }

  .step-controls button {
    flex: 1;
  }
}