chore: split CSS into partials and fix refresh during selection

app/assets/stylesheets/solid_queue_web/_01_base.css

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+*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
+
+.sqd-sr-only {
+  position: absolute;
+  width: 1px;
+  height: 1px;
+  padding: 0;
+  margin: -1px;
+  overflow: hidden;
+  clip: rect(0, 0, 0, 0);
+  white-space: nowrap;
+  border: 0;
+}
+
+:focus-visible {
+  outline: 2px solid var(--primary);
+  outline-offset: 2px;
+  border-radius: 2px;
+}
+
+:root {
+  --bg: #f8f9fa;
+  --surface: #ffffff;
+  --border: #dee2e6;
+  --text: #212529;
+  --muted: #6c757d;
+  --primary: #0d6efd;
+  --danger: #dc3545;
+  --warning: #fd7e14;
+  --success: #198754;
+  --info: #0dcaf0;
+  --purple: #6f42c1;
+}
+
+body {
+  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
+  font-size: 14px;
+  background: var(--bg);
+  color: var(--text);
+  line-height: 1.5;
+}

app/assets/stylesheets/solid_queue_web/_02_layout.css

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+.sqd-header {
+  background: var(--surface);
+  border-bottom: 1px solid var(--border);
+}
+
+.sqd-header__inner {
+  max-width: 1200px;
+  margin: 0 auto;
+  padding: 0 1.5rem;
+  display: flex;
+  align-items: center;
+  gap: 2rem;
+  height: 56px;
+}
+
+.sqd-header__title {
+  font-size: 16px;
+  font-weight: 600;
+  color: var(--text);
+  text-decoration: none;
+}
+
+.sqd-nav {
+  display: flex;
+  gap: 0.25rem;
+  list-style: none;
+}
+
+.sqd-nav a {
+  display: block;
+  padding: 0.35rem 0.75rem;
+  border-radius: 6px;
+  color: var(--muted);
+  text-decoration: none;
+  font-size: 13px;
+  font-weight: 500;
+  transition: background 0.1s, color 0.1s;
+}
+
+.sqd-nav a:hover,
+.sqd-nav a.active {
+  background: var(--bg);
+  color: var(--text);
+}
+
+.sqd-nav-toggle {
+  display: none;
+  flex-direction: column;
+  justify-content: center;
+  gap: 5px;
+  width: 36px;
+  height: 36px;
+  padding: 6px;
+  margin-left: auto;
+  background: none;
+  border: 1px solid var(--border);
+  border-radius: 5px;
+  cursor: pointer;
+}
+
+.sqd-nav-toggle span {
+  display: block;
+  height: 2px;
+  background: var(--text);
+  border-radius: 1px;
+}
+
+.sqd-main {
+  max-width: 1200px;
+  margin: 0 auto;
+  padding: 2rem 1.5rem;
+}
+
+.sqd-page-title {
+  font-size: 20px;
+  font-weight: 600;
+  margin-bottom: 0;
+}
+
+.sqd-page-header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  margin-bottom: 1.5rem;
+}
+
+.sqd-actions {
+  display: flex;
+  gap: 0.5rem;
+}
+
+.sqd-flash {
+  padding: 0.75rem 1rem;
+  border-radius: 6px;
+  margin-bottom: 1rem;
+  font-size: 13px;
+}
+.sqd-flash--notice { background: #d1e7dd; color: #0f5132; border: 1px solid #badbcc; }
+.sqd-flash--alert  { background: #f8d7da; color: #842029; border: 1px solid #f5c2c7; }

app/assets/stylesheets/solid_queue_web/_03_stats.css

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+.sqd-stats {
+  display: grid;
+  grid-template-columns: repeat(auto-fill, minmax(128px, 1fr));
+  gap: 1rem;
+  margin-bottom: 2rem;
+}
+
+.sqd-stat {
+  background: var(--surface);
+  border: 1px solid var(--border);
+  border-radius: 8px;
+  padding: 1.25rem 1rem;
+  text-align: center;
+}
+
+.sqd-stat__value {
+  font-size: 28px;
+  font-weight: 700;
+  line-height: 1;
+  margin-bottom: 0.25rem;
+}
+
+.sqd-stat__label {
+  font-size: 12px;
+  color: var(--muted);
+  text-transform: uppercase;
+  letter-spacing: 0.05em;
+}
+
+.sqd-stat--ready     .sqd-stat__value { color: var(--success); }
+.sqd-stat--scheduled .sqd-stat__value { color: var(--info); }
+.sqd-stat--claimed   .sqd-stat__value { color: var(--primary); }
+.sqd-stat--failed    .sqd-stat__value { color: var(--danger); }
+.sqd-stat--blocked   .sqd-stat__value { color: var(--warning); }
+.sqd-stat--queues    .sqd-stat__value { color: var(--purple); }
+.sqd-stat--processes .sqd-stat__value { color: var(--muted); }
+.sqd-stat--recurring .sqd-stat__value { color: var(--info); }
+
+.sqd-stat--link {
+  display: block;
+  text-decoration: none;
+  color: inherit;
+  transition: border-color 0.15s, box-shadow 0.15s, transform 0.15s;
+}
+.sqd-stat--link:hover {
+  border-color: var(--primary);
+  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
+  transform: translateY(-2px);
+}

app/assets/stylesheets/solid_queue_web/_04_table.css

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+.sqd-card {
+  background: var(--surface);
+  border: 1px solid var(--border);
+  border-radius: 8px;
+  overflow: hidden;
+}
+
+.sqd-card__header {
+  padding: 0.875rem 1rem;
+  border-bottom: 1px solid var(--border);
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 1rem;
+}
+
+.sqd-card__title {
+  font-size: 14px;
+  font-weight: 600;
+}
+
+table {
+  width: 100%;
+  border-collapse: collapse;
+}
+
+th {
+  padding: 0.625rem 1rem;
+  text-align: left;
+  font-size: 12px;
+  font-weight: 600;
+  color: var(--muted);
+  text-transform: uppercase;
+  letter-spacing: 0.05em;
+  border-bottom: 1px solid var(--border);
+  white-space: nowrap;
+}
+
+td {
+  padding: 0.75rem 1rem;
+  border-bottom: 1px solid var(--border);
+  vertical-align: middle;
+}
+
+tr:last-child td { border-bottom: none; }
+tbody tr:hover { background: var(--bg); }
+
+.sqd-empty {
+  text-align: center;
+  padding: 3rem 1rem;
+  color: var(--muted);
+}

app/assets/stylesheets/solid_queue_web/_05_badges.css

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+.sqd-badge {
+  display: inline-block;
+  padding: 0.2em 0.55em;
+  border-radius: 4px;
+  font-size: 11px;
+  font-weight: 600;
+  line-height: 1;
+  text-transform: uppercase;
+  letter-spacing: 0.04em;
+}
+
+.sqd-badge--ready      { background: #d1e7dd; color: #0f5132; }
+.sqd-badge--scheduled  { background: #cff4fc; color: #055160; }
+.sqd-badge--claimed    { background: #cfe2ff; color: #084298; }
+.sqd-badge--failed     { background: #f8d7da; color: #842029; }
+.sqd-badge--blocked    { background: #fff3cd; color: #664d03; }
+.sqd-badge--static     { background: #d1e7dd; color: #0f5132; }
+.sqd-badge--dynamic    { background: #e0d7f5; color: #4a2c8a; }
+.sqd-badge--paused     { background: #e2e3e5; color: #41464b; }
+.sqd-badge--running    { background: #d1e7dd; color: #0f5132; }
+.sqd-badge--supervisor { background: #e0d7f5; color: #4a2c8a; }
+.sqd-badge--worker     { background: #d1e7dd; color: #0f5132; }
+.sqd-badge--dispatcher { background: #cff4fc; color: #055160; }
+
+.sqd-process-meta { font-size: 12px; color: var(--muted); }
+.sqd-process-meta span + span::before { content: " · "; }
+.sqd-muted-text { color: var(--muted); font-size: 13px; }

app/assets/stylesheets/solid_queue_web/_06_buttons.css

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+.sqd-btn {
+  display: inline-flex;
+  align-items: center;
+  padding: 0.35rem 0.75rem;
+  border-radius: 5px;
+  font-size: 12px;
+  font-weight: 500;
+  text-decoration: none;
+  border: 1px solid transparent;
+  cursor: pointer;
+  transition: opacity 0.15s;
+}
+.sqd-btn:hover { opacity: 0.85; }
+.sqd-btn--primary { background: var(--primary); color: #fff; border-color: var(--primary); }
+.sqd-btn--danger  { background: var(--danger);  color: #fff; border-color: var(--danger);  }
+.sqd-btn--muted   { background: var(--surface); color: var(--text); border-color: var(--border); }
+.sqd-btn--sm      { padding: 0.2rem 0.55rem; font-size: 11px; }
+
+.sqd-row-actions { white-space: nowrap; text-align: right; width: 1%; }
+.sqd-row-actions form { display: inline; margin-left: 0.25rem; }
+
+.sqd-selection-bar {
+  display: flex;
+  align-items: center;
+  gap: 0.75rem;
+  padding: 0.5rem 1rem;
+  background: var(--bg);
+  border-bottom: 1px solid var(--border);
+  font-size: 13px;
+}
+
+table th input[type="checkbox"],
+table td input[type="checkbox"] {
+  width: 15px;
+  height: 15px;
+  cursor: pointer;
+  accent-color: var(--primary);
+}