/* Header component chung — dùng chung cho mọi trang.
 * Biến màu (--bg, --card, --line, --ink, --muted, --accent)
 * được khai báo trong :root của CSS mỗi trang. */

.site-header {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  padding: 16px 24px;
  background: var(--card);
  border-bottom: 1px solid var(--line);
}

.site-brand {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  color: inherit;
  min-width: 0;
}
.site-brand img { border-radius: 10px; flex-shrink: 0; }
.site-brand-text h1 { font-size: 20px; margin: 0 0 4px; }
.site-brand-text p { margin: 0; }

.muted { color: var(--muted); font-size: 13px; }

.site-steps {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  white-space: nowrap;
}
.site-steps a {
  color: var(--muted);
  text-decoration: none;
}
.site-steps a:hover {
  color: var(--accent);
  text-decoration: underline;
}
.step-sep { color: var(--line); }
.step-current {
  color: var(--ink);
  font-weight: 600;
}