/* ============================================================
   AI TOOLS HUB — MODERN REDESIGN
   Animated hero, glassmorphism, scroll reveal & micro-interactions
   Additive layer — loaded after the base styles so it can enhance.
   ============================================================ */

:root {
  --grad-1: #3b82f6;
  --grad-2: #7c3aed;
  --grad-3: #ec4899;
  --grad-4: #06b6d4;
  --brand-gradient: linear-gradient(120deg, #3b82f6, #7c3aed 45%, #ec4899 80%);
  --ring-soft: 0 10px 40px -12px rgba(59, 130, 246, 0.35);
}

/* ---------- Scroll progress bar ---------- */
#scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  z-index: 2000;
  background: linear-gradient(90deg, var(--grad-1), var(--grad-2), var(--grad-3));
  box-shadow: 0 0 12px rgba(124, 58, 237, 0.6);
  transition: width 0.1s linear;
}

/* ---------- Glassmorphism navigation ---------- */
.nav-glass {
  background: color-mix(in srgb, var(--nav-bg) 72%, transparent);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid color-mix(in srgb, var(--border-color) 60%, transparent);
  transition: background 0.35s ease, box-shadow 0.35s ease, height 0.35s ease;
}

.nav-glass.scrolled {
  background: color-mix(in srgb, var(--nav-bg) 92%, transparent);
  box-shadow: 0 10px 30px -12px rgba(0, 0, 0, 0.35);
}

.nav-glass .nav-link-underline {
  position: relative;
}

.nav-glass .nav-link-underline::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 100%;
  height: 2px;
  background: var(--brand-gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
  border-radius: 2px;
}

.nav-glass .nav-link-underline:hover::after {
  transform: scaleX(1);
}

.logo-badge {
  position: relative;
  overflow: hidden;
  box-shadow: 0 6px 20px -6px rgba(124, 58, 237, 0.6);
  animation: logoFloat 5s ease-in-out infinite;
}

.logo-badge::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 30%, rgba(255, 255, 255, 0.55) 50%, transparent 70%);
  transform: translateX(-120%);
  animation: logoShine 4.5s ease-in-out infinite;
}

@keyframes logoFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-3px); }
}

@keyframes logoShine {
  0%, 60% { transform: translateX(-120%); }
  100% { transform: translateX(120%); }
}

/* ============================================================
   HERO
   ============================================================ */
.hero-section {
  position: relative;
  isolation: isolate;
  padding: 2.75rem 0 2.75rem;
  background:
    radial-gradient(900px 400px at 15% -20%, rgba(59, 130, 246, 0.14), transparent 60%),
    radial-gradient(800px 380px at 90% 0%, rgba(124, 58, 237, 0.14), transparent 55%),
    linear-gradient(180deg, var(--bg-primary), var(--bg-secondary));
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: -2px;
  background-image:
    linear-gradient(to right, color-mix(in srgb, var(--text-tertiary) 12%, transparent) 1px, transparent 1px),
    linear-gradient(to bottom, color-mix(in srgb, var(--text-tertiary) 12%, transparent) 1px, transparent 1px);
  background-size: 46px 46px;
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 30%, transparent 75%);
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 30%, transparent 75%);
  opacity: 0.6;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.55;
  will-change: transform;
}

.orb-1 {
  width: 320px;
  height: 320px;
  background: radial-gradient(circle at 30% 30%, #3b82f6, transparent 70%);
  top: -100px;
  left: -80px;
  opacity: 0.4;
  animation: orbDrift1 18s ease-in-out infinite;
}

.orb-2 {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle at 30% 30%, #7c3aed, transparent 70%);
  bottom: -140px;
  right: -60px;
  opacity: 0.4;
  animation: orbDrift2 22s ease-in-out infinite;
}

.orb-3 {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle at 30% 30%, #ec4899, transparent 70%);
  top: 40%;
  left: 55%;
  animation: orbDrift3 26s ease-in-out infinite;
}

@keyframes orbDrift1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(60px, 40px) scale(1.12); }
}

@keyframes orbDrift2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-50px, -30px) scale(1.15); }
}

@keyframes orbDrift3 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-40px, 30px) scale(0.9); }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 15px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: color-mix(in srgb, var(--card-bg) 70%, transparent);
  border: 1px solid color-mix(in srgb, var(--grad-1) 35%, transparent);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  box-shadow: var(--ring-soft);
  margin-bottom: 1.25rem;
}

.hero-badge .pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.7);
  animation: pulseDot 1.8s infinite;
}

@keyframes pulseDot {
  0% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.6); }
  70% { box-shadow: 0 0 0 10px rgba(34, 197, 94, 0); }
  100% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0); }
}

.hero-title {
  font-size: clamp(1.75rem, 3.6vw, 2.75rem);
  line-height: 1.1;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 0.85rem;
}

.hero-gradient-text {
  background: linear-gradient(120deg, #3b82f6, #7c3aed, #ec4899, #06b6d4, #3b82f6);
  background-size: 300% 300%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: gradientFlow 6s ease infinite;
}

@keyframes gradientFlow {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.hero-subtitle {
  font-size: clamp(0.9rem, 1.4vw, 1.02rem);
  color: var(--text-secondary);
  max-width: 34rem;
  margin: 0 auto 1.4rem;
  line-height: 1.55;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

.btn-primary-glow {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 0.75rem 1.6rem;
  border-radius: 12px;
  font-weight: 700;
  color: #fff;
  background: var(--brand-gradient);
  background-size: 200% 200%;
  box-shadow: 0 10px 30px -8px rgba(124, 58, 237, 0.6);
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.3s ease;
  overflow: hidden;
  animation: gradientFlow 6s ease infinite;
}

.btn-primary-glow i {
  transition: transform 0.3s ease;
}

.btn-primary-glow:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 18px 45px -10px rgba(124, 58, 237, 0.75);
}

.btn-primary-glow:hover i {
  transform: translateX(5px);
}

.btn-ghost-glass {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 0.75rem 1.6rem;
  border-radius: 12px;
  font-weight: 700;
  color: var(--text-primary);
  background: color-mix(in srgb, var(--card-bg) 60%, transparent);
  border: 1.5px solid color-mix(in srgb, var(--grad-2) 40%, transparent);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  transition: transform 0.3s ease, border-color 0.3s ease, background 0.3s ease;
}

.btn-ghost-glass:hover {
  transform: translateY(-3px);
  border-color: var(--grad-2);
  background: color-mix(in srgb, var(--grad-2) 12%, var(--card-bg));
}

/* Hero stats */
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2rem;
}

.hero-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 100px;
}

.stat-num {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}

.hero-stat span:last-child {
  margin-top: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

.hero-scroll-hint {
  position: absolute;
  bottom: 22px;
  left: 50%;
  transform: translateX(-50%);
  width: 26px;
  height: 42px;
  border: 2px solid color-mix(in srgb, var(--text-tertiary) 55%, transparent);
  border-radius: 14px;
  z-index: 1;
}

.hero-scroll-hint::before {
  content: "";
  position: absolute;
  top: 8px;
  left: 50%;
  width: 4px;
  height: 8px;
  border-radius: 2px;
  background: var(--grad-2);
  transform: translateX(-50%);
  animation: scrollWheel 1.8s ease-in-out infinite;
}

@keyframes scrollWheel {
  0% { opacity: 0; transform: translate(-50%, 0); }
  40% { opacity: 1; }
  100% { opacity: 0; transform: translate(-50%, 14px); }
}

/* ============================================================
   SCROLL REVEAL  (initial hidden state only applies once JS is ready,
   so content stays visible if animations.js fails to load)
   ============================================================ */
html.js-ready .reveal {
  opacity: 0;
  transform: translateY(38px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: opacity, transform;
}

html.js-ready .reveal.reveal-left { transform: translateX(-48px); }
html.js-ready .reveal.reveal-right { transform: translateX(48px); }
html.js-ready .reveal.reveal-zoom { transform: scale(0.9); }

html.js-ready .reveal.is-visible {
  opacity: 1;
  transform: translate(0, 0) scale(1);
}

/* Staggered children (hero elements) */
.hero-badge.reveal { transition-delay: 0.05s; }
.hero-title.reveal { transition-delay: 0.15s; }
.hero-subtitle.reveal { transition-delay: 0.3s; }
.hero-cta.reveal { transition-delay: 0.45s; }
.hero-stats.reveal { transition-delay: 0.6s; }

/* Section heading accent */
.section-eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 0.5rem;
}

.section-title-underline {
  position: relative;
  display: inline-block;
}

.section-title-underline::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -12px;
  transform: translateX(-50%);
  width: 64px;
  height: 4px;
  border-radius: 4px;
  background: var(--brand-gradient);
}

/* ============================================================
   TOOL CARDS — reveal + hover shine (enhances existing .card-hover)
   ============================================================ */
#main-content .card-hover {
  position: relative;
  overflow: hidden;
  transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.6s cubic-bezier(0.22, 1, 0.36, 1),
    box-shadow 0.35s ease, border-color 0.35s ease;
}

html.js-ready #main-content .card-hover {
  opacity: 0;
  transform: translateY(30px);
}

html.js-ready #main-content .card-hover.card-in {
  opacity: 1;
  transform: translateY(0);
}

#main-content .card-hover::before {
  content: "";
  position: absolute;
  top: 0;
  left: -75%;
  width: 50%;
  height: 100%;
  background: linear-gradient(120deg, transparent, rgba(255, 255, 255, 0.25), transparent);
  transform: skewX(-20deg);
  transition: left 0.7s ease;
  pointer-events: none;
  z-index: 1;
}

#main-content .card-hover:hover::before {
  left: 130%;
}

#main-content .card-hover:hover {
  transform: translateY(-8px) !important;
  border-color: transparent !important;
  box-shadow: 0 22px 50px -18px rgba(124, 58, 237, 0.45),
    0 0 0 1.5px color-mix(in srgb, var(--grad-2) 60%, transparent) !important;
}

/* Category header decoration */
#main-content [data-category] > .flex {
  position: relative;
}

/* ============================================================
   CATEGORY / CONTRIBUTOR SECTION POLISH
   ============================================================ */
#tool-search,
#category-select,
#contributors-search {
  transition: box-shadow 0.3s ease, border-color 0.3s ease, transform 0.2s ease;
}

#tool-search:focus,
#category-select:focus,
#contributors-search:focus {
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--grad-1) 22%, transparent);
  border-color: var(--grad-1) !important;
}

.contributor-card-modern:hover {
  box-shadow: 0 20px 40px -18px rgba(124, 58, 237, 0.5) !important;
}

/* Repository stat chips shimmer on hover */
#contributors .rounded-xl.border {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

#contributors .rounded-xl.border:hover {
  transform: translateY(-4px);
}

/* About cards lift */
#about .rounded-2xl {
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.4s ease;
}

#about .rounded-2xl:hover {
  transform: translateY(-6px);
  box-shadow: 0 26px 60px -24px rgba(124, 58, 237, 0.4);
}

/* Contribute CTA animated gradient */
#contributors .bg-gradient-to-r.from-blue-500 {
  background-size: 200% 200%;
  animation: gradientFlow 7s ease infinite;
}

/* ============================================================
   TOOL CARD FAVICON + CATEGORY COUNT PILL
   ============================================================ */
.tool-favicon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  object-fit: contain;
  background: color-mix(in srgb, var(--text-tertiary) 10%, transparent);
  padding: 3px;
  flex-shrink: 0;
}

.category-count-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 30px;
  height: 26px;
  padding: 0 10px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 700;
  color: #fff;
  background: var(--brand-gradient);
  box-shadow: 0 4px 12px -4px rgba(124, 58, 237, 0.6);
}

/* ============================================================
   CATEGORY QUICK-FILTER CHIPS
   ============================================================ */
.category-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin-top: 1.25rem;
}

.category-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 15px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--text-secondary);
  background: var(--card-bg);
  border: 1.5px solid var(--border-color);
  transition: transform 0.2s ease, border-color 0.25s ease,
    background 0.25s ease, color 0.25s ease, box-shadow 0.25s ease;
  white-space: nowrap;
}

.category-chip:hover {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--grad-1) 55%, transparent);
  color: var(--text-primary);
}

.category-chip.active {
  color: #fff;
  background: var(--brand-gradient);
  border-color: transparent;
  box-shadow: 0 8px 20px -8px rgba(124, 58, 237, 0.7);
}

.category-chip .chip-count {
  font-size: 0.72rem;
  opacity: 0.75;
}

/* ============================================================
   RESULTS COUNT + EMPTY STATE
   ============================================================ */
.results-count {
  text-align: center;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-tertiary);
  margin-bottom: 1.5rem;
  letter-spacing: 0.02em;
}

.empty-state {
  text-align: center;
  padding: 3.5rem 1rem;
  color: var(--text-secondary);
}

.empty-state i {
  font-size: 2.75rem;
  color: var(--text-tertiary);
  opacity: 0.5;
  margin-bottom: 1rem;
}

.empty-state p {
  font-size: 1rem;
  font-weight: 500;
}

.empty-state .empty-hint {
  font-size: 0.85rem;
  color: var(--text-tertiary);
  margin-top: 0.4rem;
}

/* ============================================================
   LOADING SKELETONS
   ============================================================ */
.skeleton-grid {
  display: grid;
  grid-template-columns: repeat(1, minmax(0, 1fr));
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .skeleton-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
  .skeleton-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

.skeleton-card {
  border-radius: 0.75rem;
  padding: 1.5rem;
  background: var(--card-bg);
  border: 2px solid var(--card-border);
}

.skeleton-line {
  height: 14px;
  border-radius: 6px;
  background: linear-gradient(
    90deg,
    color-mix(in srgb, var(--text-tertiary) 12%, transparent) 25%,
    color-mix(in srgb, var(--text-tertiary) 22%, transparent) 37%,
    color-mix(in srgb, var(--text-tertiary) 12%, transparent) 63%
  );
  background-size: 400% 100%;
  animation: skeletonShimmer 1.4s ease infinite;
}

.skeleton-line.title { height: 20px; width: 55%; margin-bottom: 1rem; }
.skeleton-line.short { width: 40%; margin-top: 1rem; }
.skeleton-line + .skeleton-line { margin-top: 0.6rem; }

@keyframes skeletonShimmer {
  0% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@media (prefers-reduced-motion: reduce) {
  .skeleton-line { animation: none; }
}

/* ============================================================
   FANCY SCROLLBAR (dark-aware)
   ============================================================ */
[data-theme="dark"] ::-webkit-scrollbar-track { background: #0f172a; }
[data-theme="dark"] ::-webkit-scrollbar-thumb { background: #334155; }
[data-theme="dark"] ::-webkit-scrollbar-thumb:hover { background: #475569; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 640px) {
  .hero-section { padding: 5rem 0 4rem; }
  .hero-stats { gap: 1.5rem; }
  .hero-scroll-hint { display: none; }
}

/* ============================================================
   REDUCED MOTION
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  .hero-orb,
  .logo-badge,
  .logo-badge::after,
  .hero-gradient-text,
  .btn-primary-glow,
  .hero-scroll-hint::before,
  #contributors .bg-gradient-to-r.from-blue-500 {
    animation: none !important;
  }

  .reveal,
  #main-content .card-hover {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }

  #scroll-progress { display: none; }
}