/* ── RunTK Root Page Styles ── */

.main {
  flex: 1;
  max-width: 960px;
  width: 100%;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

.hero {
  text-align: center;
  margin-bottom: 48px;
}

.hero h1 {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--text) 0%, var(--muted) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 16px;
  color: var(--muted);
  max-width: 440px;
  margin: 0 auto;
  line-height: 1.5;
}

/* Tools Grid */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

/* Tool Card */
.tool-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radiusLg);
  padding: 24px;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
  cursor: pointer;
  overflow: hidden;
}

.tool-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 0%, rgba(88,166,255,0.06) 0%, transparent 70%);
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}

.tool-card:hover {
  border-color: #484f58;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}

.tool-card:hover::before { opacity: 1; }

.tool-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radiusMd);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 22px;
  flex-shrink: 0;
}

.tool-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.tool-name {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.tool-arrow {
  color: var(--muted2);
  transition: transform 0.2s, color 0.2s;
  flex-shrink: 0;
  margin-top: 2px;
}

.tool-card:hover .tool-arrow {
  transform: translateX(3px);
  color: var(--accent);
}

.tool-desc {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.5;
  margin-bottom: 20px;
  flex: 1;
}

.tool-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tool-tag {
  font-size: 11px;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: 20px;
  background: rgba(31,111,235,0.15);
  color: var(--accent);
}

.tool-tag.green {
  background: rgba(63,185,80,0.12);
  color: var(--success);
}

.tool-tag.purple {
  background: rgba(163,113,247,0.12);
  color: var(--purple);
}

.tool-tag.yellow {
  background: rgba(210,153,34,0.12);
  color: var(--warn);
}

/* Icon color variants */
.icon-blue   { background: rgba(31,111,235,0.15); color: var(--accent); }
.icon-green  { background: rgba(63,185,80,0.12);  color: var(--success); }
.icon-purple { background: rgba(163,113,247,0.12); color: var(--purple); }
.icon-yellow { background: rgba(210,153,34,0.12); color: var(--warn); }
.icon-red    { background: rgba(248,81,73,0.12);  color: var(--danger); }

/* Placeholder card */
.tool-card.placeholder {
  border-style: dashed;
  opacity: 0.5;
  cursor: default;
}

.tool-card.placeholder:hover {
  transform: none;
  box-shadow: none;
  border-color: var(--border);
}

.tool-card.placeholder::before { display: none; }

/* GitHub link */
.gh-link {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  padding: 5px 12px;
  border-radius: var(--radiusMd);
  border: 1px solid var(--border);
  background: var(--btn);
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}

.gh-link:hover {
  color: var(--text);
  background: var(--btnHover);
  border-color: #8b949e;
}

/* Responsive */
@media (max-width: 600px) {
  .topbar { padding: 12px 16px; }
  .main { padding: 32px 16px 60px; }
  .hero h1 { font-size: 26px; }
  .hero p { font-size: 14px; }
  .tools-grid { grid-template-columns: 1fr; }
  .header-badge { display: none; }
}