/* ── Nav ──────────────────────────────────────────── */
.nav {
  position: sticky; top: 0; z-index: 100; height: 64px;
  background: rgba(255,255,255,0.88);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--slate-100);
  display: flex; align-items: center; padding: 0 32px;
  transition: box-shadow 160ms ease;
}
.nav.scrolled { box-shadow: 0 1px 12px rgba(11,28,60,0.08); }
.nav-inner {
  max-width: 1280px; width: 100%; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.nav-logo { height: 36px; width: auto; }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-link {
  font-size: 14px; font-weight: 500; color: var(--fg-2);
  padding: 6px 12px; border-radius: var(--r-md); text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.nav-link:hover { background: var(--bg-muted); color: var(--fg-1); }
.nav-cta {
  font-size: 14px; font-weight: 600; color: #fff;
  padding: 8px 18px; border-radius: var(--r-md);
  background: var(--brand-gradient); text-decoration: none;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
  box-shadow: var(--shadow-brand);
}
.nav-cta:hover { opacity: 0.9; transform: translateY(-1px); }

/* ── Tool Breadcrumb ─────────────────────────────── */
.tool-breadcrumb {
  border-bottom: 1px solid var(--slate-100);
  background: var(--bg-canvas);
}
.tool-breadcrumb-inner {
  max-width: 1100px; margin: 0 auto;
  padding: 10px 32px;
  display: flex; align-items: center; gap: 8px;
  font-size: 13px;
}
.breadcrumb-back {
  color: var(--fg-3); text-decoration: none; font-weight: 500;
  display: flex; align-items: center; gap: 5px;
  transition: color var(--dur) var(--ease);
}
.breadcrumb-back:hover { color: var(--brand); }
.breadcrumb-sep { color: var(--fg-4); }
.breadcrumb-current { color: var(--fg-2); font-weight: 500; }
.tool-cat-badge {
  margin-left: auto;
  font-size: 11px; font-weight: 600; letter-spacing: 0.05em;
  color: var(--cobalt-600); background: var(--cobalt-50);
  border: 1px solid var(--cobalt-100);
  padding: 2px 10px; border-radius: var(--r-pill);
}

/* ── Hero ─────────────────────────────────────────── */
.hero {
  position: relative; overflow: hidden;
  padding: 96px 32px 80px; text-align: center; background: var(--bg-canvas);
}
.hero-bg { position: absolute; inset: 0; pointer-events: none; z-index: 0; }
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, rgba(11,92,217,0.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(11,92,217,0.045) 1px, transparent 1px);
  background-size: 48px 48px;
}
.hero-orb-a {
  position: absolute; top: -120px; left: 50%; transform: translateX(-20%);
  width: 600px; height: 600px; border-radius: 50%;
  background: radial-gradient(circle, rgba(11,92,217,0.10) 0%, transparent 70%);
}
.hero-orb-b {
  position: absolute; top: 60px; right: -80px;
  width: 320px; height: 320px; border-radius: 50%;
  background: radial-gradient(circle, rgba(37,210,255,0.12) 0%, transparent 70%);
}
.hero-inner { position: relative; z-index: 1; max-width: 760px; margin: 0 auto; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--cobalt-50); color: var(--cobalt-600);
  font-size: 12px; font-weight: 600; letter-spacing: 0.06em;
  padding: 5px 14px; border-radius: var(--r-pill);
  border: 1px solid var(--cobalt-100); margin-bottom: 28px;
}
.hero-badge-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--cobalt-500); animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}
.hero-h1 {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 800; line-height: 1.15; letter-spacing: -0.025em;
  color: var(--fg-1); margin-bottom: 8px;
}
.hero-h1-accent {
  background: var(--brand-gradient-text);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.hero-sub {
  font-size: 16px; color: var(--fg-3);
  line-height: 1.7; margin: 20px auto 0; max-width: 520px;
}

/* ── Toolbar ──────────────────────────────────────── */
.toolbar { padding: 48px 32px 0; max-width: 1280px; margin: 0 auto; }
.search-wrap { position: relative; max-width: 520px; margin: 0 auto 32px; }
.search-icon {
  position: absolute; left: 14px; top: 50%; transform: translateY(-50%);
  color: var(--fg-3); pointer-events: none;
}
.search-input {
  width: 100%; height: 44px; padding: 0 16px 0 42px;
  font-size: 15px; font-family: var(--font-sans); color: var(--fg-1);
  background: var(--bg-canvas);
  border: 1.5px solid var(--slate-200); border-radius: var(--r-pill);
  outline: none;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.search-input::placeholder { color: var(--fg-4); }
.search-input:focus {
  border-color: var(--cobalt-400);
  box-shadow: 0 0 0 3px rgba(59,123,243,0.15);
}
.filter-tabs { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.filter-tab {
  font-size: 13px; font-weight: 500;
  padding: 6px 16px; border-radius: var(--r-pill);
  border: 1.5px solid var(--slate-200); background: var(--bg-canvas);
  color: var(--fg-2); cursor: pointer;
  transition: all var(--dur) var(--ease);
}
.filter-tab:hover { border-color: var(--cobalt-200); color: var(--cobalt-600); background: var(--cobalt-50); }
.filter-tab.active {
  background: var(--brand-gradient); color: #fff; border-color: transparent;
  box-shadow: 0 2px 10px rgba(11,92,217,0.22);
}

/* ── Grid ─────────────────────────────────────────── */
.grid-section { max-width: 1280px; margin: 0 auto; padding: 40px 32px 96px; }
.grid-count {
  font-size: 13px; color: var(--fg-3); margin-bottom: 24px;
  font-weight: 500; letter-spacing: 0.02em;
  display: flex; align-items: center; gap: 12px;
}
.clear-filter {
  font-size: 12px; color: var(--cobalt-600);
  background: none; border: none; cursor: pointer; font-weight: 600; padding: 0;
}
.tool-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 960px) { .tool-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 580px) { .tool-grid { grid-template-columns: 1fr; } }

/* ── Card ─────────────────────────────────────────── */
.tool-card {
  background: var(--bg-surface);
  border: 1.5px solid var(--slate-200); border-radius: var(--r-xl);
  padding: 24px; display: flex; flex-direction: column;
  cursor: pointer; text-decoration: none;
  position: relative; overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: border-color var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease),
              transform var(--dur) var(--ease);
}
.tool-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--brand-gradient); opacity: 0;
  transition: opacity var(--dur) var(--ease);
}
.tool-card:hover {
  border-color: var(--cobalt-200);
  box-shadow: var(--shadow-lg); transform: translateY(-3px);
}
.tool-card:hover::before { opacity: 1; }
.tool-card[data-new="true"]::after {
  content: 'NEW'; position: absolute; top: 16px; right: 16px;
  font-size: 10px; font-weight: 700; letter-spacing: 0.1em;
  background: var(--brand-gradient); color: #fff;
  padding: 2px 8px; border-radius: var(--r-pill);
}
.tool-icon-wrap {
  width: 48px; height: 48px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px; flex-shrink: 0;
}
.tool-name {
  font-family: var(--font-display);
  font-size: 17px; font-weight: 800;
  color: var(--fg-1); margin-bottom: 8px;
  line-height: 1.25; letter-spacing: -0.01em;
}
.tool-name-en {
  font-size: 12px; color: var(--fg-4);
  margin-bottom: 6px; font-family: var(--font-mono);
  letter-spacing: 0.02em;
}
.tool-desc { font-size: 13.5px; line-height: 1.65; color: var(--fg-3); flex: 1; text-wrap: pretty; }
.tool-tag {
  display: inline-block;
  font-size: 11px; font-weight: 600; letter-spacing: 0.05em;
  color: var(--fg-3); background: var(--bg-muted);
  padding: 2px 8px; border-radius: var(--r-pill);
  margin-right: 4px; margin-bottom: 4px;
}
.tool-footer {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: 20px; padding-top: 16px;
  border-top: 1px solid var(--slate-100);
}
.tool-tags-row { display: flex; flex-wrap: wrap; gap: 4px; }
.tool-cta {
  font-size: 13px; font-weight: 600; color: var(--cobalt-600);
  display: flex; align-items: center; gap: 5px;
  transition: gap var(--dur) var(--ease), color var(--dur) var(--ease);
}
.tool-card:hover .tool-cta { gap: 9px; color: var(--cobalt-500); }
.tool-cta-arrow { display: inline-block; transition: transform var(--dur) var(--ease); }
.tool-card:hover .tool-cta-arrow { transform: translateX(3px); }

/* ── Tool detail page primitives ─────────────────── */
.tool-page-shell { max-width: 1100px; margin: 0 auto; padding: 48px 32px 96px; }
.tool-page-head {
  display: flex; align-items: center; gap: 16px; margin-bottom: 32px;
}
.tool-page-head .icon {
  width: 56px; height: 56px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  background: var(--cobalt-50); color: var(--cobalt-600);
}
.tool-page-head h1 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  font-weight: 800; letter-spacing: -0.02em;
}
.tool-page-head .subtitle {
  font-size: 14px; color: var(--fg-3); margin-top: 4px;
}
.tool-panel {
  background: var(--bg-surface);
  border: 1.5px solid var(--slate-200); border-radius: var(--r-xl);
  padding: 24px; box-shadow: var(--shadow-md);
}
.tool-panel + .tool-panel { margin-top: 20px; }

/* ── FAQ section ─────────────────────────────────── */
.faq-section { margin-top: 48px; }
.faq-section h2 {
  font-family: var(--font-display); font-size: 1.5rem; font-weight: 800;
  margin-bottom: 16px;
}
.faq-item { border-top: 1px solid var(--slate-100); padding: 16px 0; }
.faq-item:last-child { border-bottom: 1px solid var(--slate-100); }
.faq-q { font-weight: 600; color: var(--fg-1); margin-bottom: 8px; }
.faq-a { color: var(--fg-3); line-height: 1.6; }

/* ── Hidden AI section ───────────────────────────── */
.for-ai { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

/* ── No results state (Hub) ──────────────────────── */
.no-results { grid-column: 1/-1; text-align: center; padding: 80px 20px; color: var(--fg-3); }
.no-results-icon { margin-bottom: 12px; opacity: 0.4; display: inline-flex; }
.no-results h4 { font-size: 16px; font-weight: 600; color: var(--fg-2); margin-bottom: 6px; }
.no-results p { font-size: 13px; margin-top: 4px; }

/* ── Footer ──────────────────────────────────────── */
.footer {
  background: var(--slate-900); color: var(--slate-400);
  padding: 48px 32px; text-align: center; font-size: 13px;
}
.footer-brand { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 16px; }
.footer-brandname {
  font-family: var(--font-display); font-weight: 800; font-size: 16px;
  background: var(--brand-gradient-text);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.footer-tag { font-size: 13px; color: var(--slate-500); }
.footer-links { display: flex; gap: 24px; justify-content: center; margin-top: 12px; }
.footer-link { color: var(--slate-500); text-decoration: none; font-size: 13px; }
.footer-link:hover { color: var(--cyan-400); }
.footer-copy { margin-top: 24px; font-size: 12px; color: var(--slate-500); opacity: 0.7; }
.footer-stats { font-size: 12px; color: var(--slate-500); margin-top: 8px; }
.footer-stats strong { color: var(--cyan-400); font-family: var(--font-mono); font-feature-settings: 'tnum' 1; }