/* ─────────────────────────────────────────
   AI TOOLS LIBRARY — styles.css
   Dark / Lightning Theme
───────────────────────────────────────── */

:root {
  --bg:           #04070d;
  --surface:      #090f18;
  --surface2:     #0e1622;
  --border:       #162030;
  --border-glow:  rgba(0,210,255,0.25);
  --accent:       #00d4ff;
  --accent2:      #ff3c6e;
  --accent3:      #7fff4f;
  --bolt:         #ffe659;
  --text:         #e4ecf5;
  --text-muted:   #607a92;
  --text-dim:     #2e455a;
  --card-hover:   #0d1a27;
  --glow:         rgba(0,212,255,0.12);
  --glow-strong:  rgba(0,212,255,0.25);
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: 'DM Mono', monospace;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ─── LIGHTNING CANVAS ─── */
#lightning-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.55;
}

/* ─── BG PARTICLES ─── */
.bg-particles {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.particle {
  position: absolute;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0;
  animation: floatUp var(--dur, 8s) var(--delay, 0s) ease-in infinite;
}

@keyframes floatUp {
  0%   { transform: translateY(100vh) scale(0); opacity: 0; }
  10%  { opacity: 0.4; }
  90%  { opacity: 0.1; }
  100% { transform: translateY(-10vh) scale(1.5); opacity: 0; }
}

/* ─── GRID OVERLAY ─── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,212,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,0.025) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  z-index: 0;
}

/* ─── MOBILE NAV ─── */
.mobile-nav {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  background: rgba(4,7,13,0.96);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 0 30px rgba(0,212,255,0.08);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-logo {
  font-size: 22px;
  filter: drop-shadow(0 0 8px var(--bolt));
  animation: boltFlicker 3s ease-in-out infinite;
}

@keyframes boltFlicker {
  0%, 100% { filter: drop-shadow(0 0 8px var(--bolt)); }
  50%       { filter: drop-shadow(0 0 20px var(--bolt)) brightness(1.4); }
}

.nav-title {
  font-family: 'Syne', sans-serif;
  font-size: 18px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.02em;
}

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

/* HAMBURGER */
.hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: 1px solid var(--border);
  padding: 8px 10px;
  border-radius: 4px;
  cursor: pointer;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.hamburger:hover {
  border-color: var(--accent);
  box-shadow: 0 0 12px var(--glow);
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-muted);
  border-radius: 2px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  transform-origin: center;
}

.hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
  background: var(--accent);
}
.hamburger.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
  background: var(--accent);
}

/* NAV MENU */
.nav-menu {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.3s;
  border-top: 0px solid var(--border);
}

.nav-menu.open {
  max-height: 500px;
  padding: 16px 20px 20px;
  border-top: 1px solid var(--border);
}

.nav-search-wrap {
  position: relative;
  margin-bottom: 14px;
}

.nav-search-wrap svg {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-dim);
}

#mobile-search {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 10px 12px 10px 38px;
  font-family: 'DM Mono', monospace;
  font-size: 13px;
  color: var(--text);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

#mobile-search:focus {
  border-color: var(--accent);
  box-shadow: 0 0 16px var(--glow);
}
#mobile-search::placeholder { color: var(--text-dim); }

.nav-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

/* ─── LIGHTNING BUTTON BASE ─── */
.filter-btn {
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  padding: 7px 13px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

/* Lightning sweep effect */
.filter-btn::after {
  content: '';
  position: absolute;
  top: -50%; left: -100%;
  width: 60%; height: 200%;
  background: linear-gradient(
    105deg,
    transparent 0%,
    rgba(0,212,255,0.15) 45%,
    rgba(255,230,89,0.2) 50%,
    rgba(0,212,255,0.15) 55%,
    transparent 100%
  );
  transform: skewX(-20deg);
  transition: left 0.5s ease;
  pointer-events: none;
}

.filter-btn:hover::after,
.filter-btn.active::after {
  left: 150%;
}

.filter-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 14px var(--glow), inset 0 0 10px rgba(0,212,255,0.05);
}

.filter-btn.active {
  background: rgba(0,212,255,0.1);
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 20px var(--glow-strong), inset 0 0 12px rgba(0,212,255,0.08);
}

/* ─── HEADER ─── */
header {
  position: relative;
  z-index: 10;
  padding: 70px 40px 50px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(0,212,255,0.05) 0%, transparent 100%);
  overflow: hidden;
}

/* Electric arc decoration on header */
header::after {
  content: '';
  position: absolute;
  bottom: -1px; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg,
    transparent 0%,
    var(--accent) 20%,
    var(--bolt) 50%,
    var(--accent) 80%,
    transparent 100%);
  animation: arcScan 4s ease-in-out infinite;
}

@keyframes arcScan {
  0%, 100% { opacity: 0.4; filter: blur(1px); }
  50%       { opacity: 1;   filter: blur(0px) drop-shadow(0 0 6px var(--accent)); }
}

.header-inner { max-width: 1400px; margin: 0 auto; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(0,212,255,0.07);
  border: 1px solid rgba(0,212,255,0.2);
  padding: 5px 14px;
  border-radius: 2px;
  margin-bottom: 22px;
  box-shadow: 0 0 16px rgba(0,212,255,0.08);
}

.badge-dot {
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
  box-shadow: 0 0 6px var(--accent);
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); box-shadow: 0 0 6px var(--accent); }
  50%       { opacity: 0.4; transform: scale(0.6); box-shadow: none; }
}

h1 {
  font-family: 'Syne', sans-serif;
  font-size: clamp(38px, 6.5vw, 88px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 16px;
  text-shadow: 0 0 60px rgba(0,212,255,0.1);
}

h1 span {
  color: var(--accent);
  text-shadow: 0 0 40px rgba(0,212,255,0.4);
}

.subtitle {
  font-size: 13px;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  margin-bottom: 42px;
}

.stats-row { display: flex; gap: 36px; flex-wrap: wrap; }

.stat { display: flex; flex-direction: column; gap: 4px; }

.stat-num {
  font-family: 'Syne', sans-serif;
  font-size: 30px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  text-shadow: 0 0 20px rgba(0,212,255,0.5);
}

.stat-label {
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
}

/* ─── DESKTOP CONTROLS ─── */
.controls {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(4,7,13,0.96);
  backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border);
  padding: 14px 40px;
  box-shadow: 0 4px 32px rgba(0,0,0,0.5), 0 1px 0 rgba(0,212,255,0.08);
}

.controls-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  gap: 14px;
  align-items: center;
  flex-wrap: wrap;
}

.search-wrap {
  position: relative;
  flex: 1;
  min-width: 240px;
}

.search-wrap svg {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-dim);
}

#search {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 10px 14px 10px 44px;
  font-family: 'DM Mono', monospace;
  font-size: 13px;
  color: var(--text);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

#search:focus {
  border-color: var(--accent);
  box-shadow: 0 0 20px var(--glow);
}
#search::placeholder { color: var(--text-dim); }

.filters { display: flex; gap: 7px; flex-wrap: wrap; }

/* ─── MAIN ─── */
main {
  position: relative;
  z-index: 1;
  max-width: 1400px;
  margin: 0 auto;
  padding: 44px 40px 90px;
}

/* ─── SECTION ─── */
.section {
  margin-bottom: 60px;
  animation: fadeUp 0.45s ease both;
}

.section:nth-child(2) { animation-delay: 0.05s; }
.section:nth-child(3) { animation-delay: 0.1s; }
.section:nth-child(4) { animation-delay: 0.15s; }
.section:nth-child(5) { animation-delay: 0.2s; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

.section-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 22px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
  position: relative;
}

/* Glowing line under section header */
.section-header::after {
  content: '';
  position: absolute;
  bottom: -1px; left: 0;
  width: 60px; height: 2px;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
}

.section-icon {
  width: 38px; height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,212,255,0.07);
  border: 1px solid rgba(0,212,255,0.18);
  border-radius: 5px;
  font-size: 17px;
  box-shadow: 0 0 12px rgba(0,212,255,0.08);
  flex-shrink: 0;
}

.section-title {
  font-family: 'Syne', sans-serif;
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.02em;
}

.section-count {
  font-size: 11px;
  color: var(--text-dim);
  background: var(--surface2);
  border: 1px solid var(--border);
  padding: 2px 10px;
  border-radius: 20px;
  margin-left: auto;
}

/* ─── CARD GRID ─── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 12px;
}

/* ─── TOOL CARD ─── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 18px 20px;
  transition: all 0.28s;
  position: relative;
  overflow: hidden;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 10px;
  text-decoration: none;
  color: inherit;
}

/* Top accent line */
.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--bolt), transparent);
  opacity: 0;
  transition: opacity 0.28s;
}

/* Lightning sweep on hover */
.card::after {
  content: '';
  position: absolute;
  top: 0; left: -120%;
  width: 80%; height: 100%;
  background: linear-gradient(
    105deg,
    transparent,
    rgba(0,212,255,0.04) 40%,
    rgba(255,230,89,0.06) 50%,
    rgba(0,212,255,0.04) 60%,
    transparent
  );
  transition: left 0.6s ease;
  pointer-events: none;
}

.card:hover::after { left: 120%; }

.card:hover {
  background: var(--card-hover);
  border-color: rgba(0,212,255,0.3);
  transform: translateY(-3px);
  box-shadow:
    0 12px 40px rgba(0,0,0,0.5),
    0 0 0 1px rgba(0,212,255,0.1),
    0 0 30px rgba(0,212,255,0.06);
}

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

.card-num {
  font-size: 10px;
  color: var(--text-dim);
  letter-spacing: 0.1em;
}

.card-name {
  font-family: 'Syne', sans-serif;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
  line-height: 1.2;
}

.card-name svg {
  width: 11px; height: 11px;
  color: var(--text-dim);
  flex-shrink: 0;
  transition: color 0.2s, transform 0.2s;
}

.card:hover .card-name svg {
  color: var(--accent);
  transform: translate(2px, -2px);
}

.card-desc {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.65;
  flex: 1;
}

.card-url {
  font-size: 10px;
  color: var(--text-dim);
  letter-spacing: 0.03em;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  padding-top: 8px;
  border-top: 1px solid var(--border);
  transition: color 0.2s;
}

.card:hover .card-url { color: var(--accent); }

/* ─── NO RESULTS ─── */
#no-results {
  display: none;
  text-align: center;
  padding: 90px 20px;
  color: var(--text-dim);
  font-size: 14px;
}

#no-results span {
  display: block;
  font-size: 52px;
  margin-bottom: 18px;
}

/* ─── FOOTER ─── */
footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 28px 32px;
  border-top: 1px solid var(--border);
  font-size: 11px;
  color: var(--text-dim);
  letter-spacing: 0.09em;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.footer-bolt {
  font-size: 16px;
  filter: drop-shadow(0 0 6px var(--bolt));
  animation: boltFlicker 2.5s ease-in-out infinite;
}

/* ─── SCROLLBAR ─── */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-dim); }

/* ─── RESPONSIVE ─── */
@media (max-width: 900px) {
  .mobile-nav { display: block; }
  .controls { display: none; }
  header { padding: 90px 20px 40px; }
  main { padding: 28px 16px 70px; }
  h1 { font-size: 38px; }
  .card-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
}

@media (max-width: 560px) {
  .card-grid { grid-template-columns: 1fr; }
  h1 { font-size: 32px; }
  .stats-row { gap: 20px; }
}