/* ── Nav ── */
.nav {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 1.25rem;
  height: 52px;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-logo {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  text-decoration: none;
  flex-shrink: 0;
}

.nav-logo span { color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
  flex: 1;
}

.nav-links a {
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
}

.nav-links a:hover,
.nav-links a.active {
  background: var(--accent-soft);
  color: var(--accent);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: auto;
}

.btn-icon {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.btn-icon:hover {
  background: var(--surface-2);
  color: var(--text);
}

/* ── Page shell ── */
.page-main {
  flex: 1;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
  padding: 1.5rem 1.25rem;
}

/* ── Footer ── */
.footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 1rem 1.25rem;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer a { color: var(--text-muted); }
.footer a:hover { color: var(--accent); }

/* ── Hub page ── */
.hero {
  text-align: center;
  padding: 3rem 1rem 2rem;
}

.hero h1 {
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
  background: linear-gradient(135deg, var(--accent) 0%, #7c3aed 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 520px;
  margin: 0 auto;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
  margin-top: 2rem;
}

.tool-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  text-decoration: none;
  color: var(--text);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transition: box-shadow 0.2s, border-color 0.2s, transform 0.15s;
  position: relative;
}

.tool-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
  transform: translateY(-2px);
  color: var(--text);
}

.tool-card .icon {
  font-size: 2rem;
  margin-bottom: 0.25rem;
}

.tool-card h2 {
  font-size: 1.1rem;
  font-weight: 700;
}

.tool-card p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.tool-card .badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.15rem 0.45rem;
  border-radius: 99px;
  background: var(--warning-soft);
  color: var(--warning);
}

.tool-card .badge.live {
  background: var(--success-soft);
  color: var(--success);
}

/* ── Placeholder pages ── */
.placeholder-page {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 5rem 1rem;
  text-align: center;
}

.placeholder-page .icon { font-size: 3.5rem; }
.placeholder-page h1 { font-size: 1.75rem; font-weight: 700; }
.placeholder-page p { color: var(--text-muted); max-width: 400px; }

/* ── Responsive ── */
@media (max-width: 640px) {
  .nav-inner { gap: 0.75rem; }
  .nav-links a { padding: 0.3rem 0.5rem; font-size: 0.8rem; }
  .hero h1 { font-size: 1.6rem; }
}