/* =====================================================================
   Web Utility Suite — Hub / Landing page (hub.css)
   Extends base.css. Colors come ONLY from base.css CSS variables.
   ===================================================================== */

/* ---- Skip link ---- */
.skip-link {
  position: fixed; top: -60px; left: var(--space-4); z-index: 100;
  background: var(--surface-solid); color: var(--text);
  border: 1px solid var(--border-strong); border-radius: var(--radius-md);
  padding: 10px 16px; font-weight: 600; font-size: 14px;
  transition: top var(--dur-2) var(--ease); text-decoration: none;
}
.skip-link:focus { top: var(--space-4); }

/* ---- Topbar refinements ---- */
.topbar { backdrop-filter: blur(14px) saturate(140%); -webkit-backdrop-filter: blur(14px) saturate(140%); }
.topbar__inner {
  display: flex; align-items: center; gap: var(--space-3);
  padding: var(--space-2) var(--space-6);
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-md);
}
.brand { text-decoration: none; color: var(--text); }
.brand:hover { text-decoration: none; }
.brand__text { display: flex; flex-direction: column; line-height: 1.1; }
.brand .sub { margin-top: 2px; }

/* Theme icon swap (no JS needed — driven by [data-theme]) */
[data-theme-toggle] .i-moon { display: none; }
[data-theme="light"] [data-theme-toggle] .i-sun { display: none; }
[data-theme="light"] [data-theme-toggle] .i-moon { display: block; }

/* ===================== Hero ===================== */
.hero { position: relative; padding: var(--space-12) 0 var(--space-16); overflow: hidden; }
.hero__inner { display: flex; flex-direction: column; align-items: center; text-align: center; max-width: 820px; }
.hero__glow {
  position: absolute; inset: -10% 0 auto; height: 520px; z-index: -1; pointer-events: none;
  background:
    radial-gradient(40vw 30vw at 50% 0%, var(--bg-grad-1), transparent 65%),
    radial-gradient(28vw 24vw at 22% 18%, var(--bg-grad-3), transparent 60%),
    radial-gradient(30vw 24vw at 80% 14%, var(--bg-grad-2), transparent 60%);
  filter: blur(8px);
  animation: heroDrift 16s var(--ease) infinite alternate;
}
@keyframes heroDrift { from { transform: translateY(0) scale(1); opacity: .9; } to { transform: translateY(-14px) scale(1.04); opacity: 1; } }

.hero__eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 600; color: var(--text-secondary);
  background: var(--surface-2); border: 1px solid var(--border);
  padding: 6px 14px; border-radius: var(--radius-full);
  margin-bottom: var(--space-5);
}
.hero__eyebrow-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--gradient-brand); box-shadow: 0 0 10px var(--brand-500);
  animation: pulse 2.4s var(--ease) infinite;
}
@keyframes pulse { 0%,100% { opacity: 1; transform: scale(1); } 50% { opacity: .55; transform: scale(.8); } }

.hero__title { font-size: clamp(2.3rem, 1.4rem + 4.2vw, 4.1rem); margin-bottom: var(--space-5); }
.hero__lead { font-size: clamp(1rem, .96rem + .4vw, 1.18rem); color: var(--text-secondary); max-width: 640px; margin-bottom: var(--space-8); }

.hero__actions { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: var(--space-3); margin-bottom: var(--space-10); }
.hero__theme-chip {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 600; color: var(--text-secondary);
  background: var(--gradient-brand-soft); border: 1px solid var(--border);
  padding: 8px 14px; border-radius: var(--radius-full);
}
.hero__theme-chip svg { width: 15px; height: 15px; }

.hero__stats {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: center;
  gap: var(--space-5); list-style: none; margin: 0; padding: 0;
}
.hero__stat { display: flex; flex-direction: column; align-items: center; gap: 2px; }
.hero__stat strong {
  font-size: 1.4rem; font-weight: 800; letter-spacing: -.02em;
  background: var(--gradient-brand); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.hero__stat span { font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: .08em; color: var(--text-muted); }
.hero__stat-sep { width: 1px; height: 28px; background: var(--border-strong); }

/* ===================== Section heads ===================== */
.tools, .why { padding: var(--space-12) 0; }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: var(--space-6); flex-wrap: wrap; margin-bottom: var(--space-8); }
.section-head--center { justify-content: center; text-align: center; }
.section-kicker {
  font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .12em;
  color: var(--brand-400); margin-bottom: var(--space-2);
}
.section-head h2 { font-size: clamp(1.5rem, 1.2rem + 1.4vw, 2.1rem); margin-bottom: var(--space-2); }
.section-sub { max-width: 520px; margin: 0; font-size: .98rem; }

/* ---- Search ---- */
.tools__search { position: relative; flex: none; width: min(280px, 100%); }
.tools__search svg { position: absolute; left: 13px; top: 50%; transform: translateY(-50%); width: 17px; height: 17px; color: var(--text-muted); pointer-events: none; }
.tools__search input { padding-left: 40px; border-radius: var(--radius-full); }

/* ===================== Tools grid ===================== */
.tools__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-5);
}

.tool-card {
  position: relative; display: flex; flex-direction: column;
  padding: var(--space-6); border-radius: var(--radius-xl);
  background: var(--surface); border: 1px solid var(--border);
  box-shadow: var(--shadow-md); color: var(--text); text-decoration: none;
  overflow: hidden; isolation: isolate;
  transition: transform var(--dur-2) var(--ease), border-color var(--dur-2), box-shadow var(--dur-2), background var(--dur-2);
}
.tool-card::before {
  content: ""; position: absolute; inset: 0; z-index: -1; opacity: 0;
  background: var(--gradient-brand-soft);
  transition: opacity var(--dur-2) var(--ease);
}
.tool-card::after {
  content: ""; position: absolute; left: 0; right: 0; top: 0; height: 2px;
  background: var(--gradient-brand); opacity: 0; transition: opacity var(--dur-2);
}
.tool-card:hover, .tool-card:focus-visible {
  transform: translateY(-5px); text-decoration: none;
  border-color: var(--border-strong);
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(99,102,241,.25), 0 18px 50px -18px rgba(99,102,241,.5);
  outline: none;
}
.tool-card:hover::before, .tool-card:focus-visible::before { opacity: 1; }
.tool-card:hover::after, .tool-card:focus-visible::after { opacity: 1; }

.tool-card__icon {
  width: 46px; height: 46px; flex: none; border-radius: var(--radius-md);
  display: grid; place-items: center; margin-bottom: var(--space-4);
  border: 1px solid var(--border);
  transition: transform var(--dur-2) var(--ease), box-shadow var(--dur-2);
}
.tool-card__icon svg { width: 22px; height: 22px; }
.tool-card:hover .tool-card__icon, .tool-card:focus-visible .tool-card__icon { transform: scale(1.06) rotate(-3deg); }

/* Distinct accent tints, all derived from brand variables */
.tool-card__icon[data-accent="indigo"] { color: var(--brand-400); background: rgba(99,102,241,.14); box-shadow: 0 0 0 3px rgba(99,102,241,.06); }
.tool-card__icon[data-accent="violet"] { color: var(--accent-500); background: rgba(139,92,246,.14); box-shadow: 0 0 0 3px rgba(139,92,246,.06); }
.tool-card__icon[data-accent="cyan"]   { color: var(--accent-cyan); background: rgba(34,211,238,.14); box-shadow: 0 0 0 3px rgba(34,211,238,.06); }
.tool-card__icon[data-accent="pink"]   { color: var(--accent-pink); background: rgba(217,70,239,.14); box-shadow: 0 0 0 3px rgba(217,70,239,.06); }

.tool-card__title { font-size: 1.08rem; margin-bottom: var(--space-2); }
.tool-card__desc { font-size: .92rem; color: var(--text-secondary); margin-bottom: var(--space-4); flex: 1; line-height: 1.5; }
.tool-card__tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: var(--space-5); }
.tool-card__go {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13px; font-weight: 700; color: var(--brand-400);
  margin-top: auto;
}
.tool-card__go svg { width: 15px; height: 15px; transition: transform var(--dur-2) var(--ease); }
.tool-card:hover .tool-card__go svg, .tool-card:focus-visible .tool-card__go svg { transform: translateX(4px); }

/* Filtered-out state */
.tool-card[hidden] { display: none; }
.tools__empty { text-align: center; color: var(--text-muted); padding: var(--space-10) 0; font-size: .95rem; }
.tools__empty strong { color: var(--text-secondary); }

/* ===================== Why this suite ===================== */
.why__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-5);
}
.why-card { padding: var(--space-6); display: flex; flex-direction: column; transition: transform var(--dur-2) var(--ease), border-color var(--dur-2); }
.why-card:hover { transform: translateY(-3px); border-color: var(--border-strong); }
.why-card__icon {
  width: 44px; height: 44px; flex: none; border-radius: var(--radius-md);
  display: grid; place-items: center; margin-bottom: var(--space-4);
  color: #fff; background: var(--gradient-brand); box-shadow: var(--shadow-glow);
}
.why-card__icon svg { width: 22px; height: 22px; }
.why-card h3 { font-size: 1.05rem; margin-bottom: var(--space-2); }
.why-card p { font-size: .92rem; margin: 0; line-height: 1.55; }

/* ===================== Footer ===================== */
.app-footer p { margin: 0 0 var(--space-2); }
.footer-links a { color: var(--text-secondary); }
.footer-tagline { margin-top: var(--space-3); font-size: 12px; }

/* ===================== Entrance stagger ===================== */
.rise, .fade-in { animation-delay: calc(var(--d, 0) * .07s); }

@media (prefers-reduced-motion: reduce) {
  .rise, .fade-in { animation-delay: 0s !important; }
  .hero__glow, .hero__eyebrow-dot { animation: none !important; }
}

/* ===================== Responsive ===================== */
@media (max-width: 760px) {
  .topbar__inner { border-radius: var(--radius-xl); padding: var(--space-2) var(--space-4); }
  .section-head { align-items: flex-start; }
  .tools__search { width: 100%; }
  .hero { padding-top: var(--space-10); }
}
@media (max-width: 460px) {
  .hero__stats { gap: var(--space-3); }
  .hero__stat-sep { display: none; }
  .hero__actions .btn { flex: 1 1 100%; }
}