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

/* ── Dark theme (default) ────────────────── */
:root {
  --bg:         #13151f;
  --header-bg:  rgba(18, 20, 30, 0.9);
  --input-bg:   #1c1e2a;
  --card-bg:    #1c1e2c;
  --border:     #242736;
  --text:       #e2e8f0;
  --text-muted: #64748b;
  --card-muted: #64748b;
  --accent:     #6366f1;
  --shadow-sm:  0 1px 4px rgba(0,0,0,0.4);
  --shadow-md:  0 6px 24px rgba(0,0,0,0.5);
  --toast-bg:   #1e2132;
  --radius:     12px;
  --header-h:   72px;
}

/* ── Light theme ─────────────────────────── */
[data-theme="light"] {
  --bg:         #f0f2f8;
  --header-bg:  rgba(250, 251, 255, 0.92);
  --input-bg:   #ffffff;
  --card-bg:    #ffffff;
  --border:     #dce1ee;
  --text:       #1e293b;
  --text-muted: #64748b;
  --card-muted: #64748b;
  --shadow-sm:  0 1px 4px rgba(0,0,0,0.07);
  --shadow-md:  0 6px 24px rgba(0,0,0,0.10);
  --toast-bg:   #1e293b;
}

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

/* ── Header ─────────────────────────────── */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: var(--header-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  max-width: 1600px;
  margin: 0 auto;
  height: 100%;
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 14px;
}

/* ── Logo ────────────────────────────────── */
.logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.logo img,
.logo svg {
  width: 34px;
  height: 34px;
  display: block;
}

/* ── Search ──────────────────────────────── */
.search-wrap {
  flex: 1;
  min-width: 0;
  position: relative;
}

.search-wrap svg {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

#search {
  width: 100%;
  padding: 10px 12px 10px 38px;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  font-size: 0.9rem;
  color: var(--text);
  background: var(--input-bg);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

#search:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.2);
}

#search::placeholder { color: var(--text-muted); }

/* ── Count badge ─────────────────────────── */
.count-badge {
  white-space: nowrap;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--input-bg);
  border: 1.5px solid var(--border);
  border-radius: 8px;
  padding: 6px 12px;
}

.count-badge strong {
  color: var(--accent);
  font-size: 0.95rem;
}

/* ── Theme toggle button ─────────────────── */
.theme-btn {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  background: var(--input-bg);
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.15s, border-color 0.15s;
}

.theme-btn:hover {
  color: var(--text);
  border-color: var(--accent);
}

/* ── PNG Toggle ──────────────────────────── */
.toggle-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  user-select: none;
}

.toggle-wrap:hover { color: var(--text); }

.toggle-wrap input[type="checkbox"] { display: none; }

.toggle-track {
  width: 40px;
  height: 22px;
  background: var(--border);
  border-radius: 11px;
  position: relative;
  transition: background 0.2s;
  flex-shrink: 0;
}

.toggle-track::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #fff;
  top: 3px;
  left: 3px;
  transition: transform 0.2s;
  box-shadow: 0 1px 3px rgba(0,0,0,0.4);
}

.toggle-wrap input:checked + .toggle-track { background: var(--accent); }

.toggle-wrap input:checked + .toggle-track::after { transform: translateX(18px); }

/* ── Main / Grid ─────────────────────────── */
main {
  max-width: 1600px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

#grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 12px;
}

/* ── Card ────────────────────────────────── */
.card {
  background: var(--card-bg);
  border: 1.5px solid transparent;
  border-radius: var(--radius);
  padding: 16px 10px 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s, border-color 0.15s;
  -webkit-tap-highlight-color: transparent;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
}

.card:active { transform: translateY(-1px); }

.card-img {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-img img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.card-name {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--card-muted);
  text-align: center;
  word-break: break-word;
  line-height: 1.3;
  max-width: 100%;
}

/* ── Skeleton ────────────────────────────── */
.skeleton {
  background: var(--input-bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 10px 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.skeleton-img {
  width: 56px;
  height: 56px;
  border-radius: 8px;
  background: linear-gradient(90deg, var(--border) 25%, var(--input-bg) 50%, var(--border) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite;
}

.skeleton-name {
  width: 65%;
  height: 10px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--border) 25%, var(--input-bg) 50%, var(--border) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite;
}

@keyframes shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ── Empty state ─────────────────────────── */
#empty {
  display: none;
  grid-column: 1 / -1;
  text-align: center;
  padding: 80px 20px;
  color: var(--text-muted);
}

#empty svg { margin-bottom: 12px; opacity: 0.25; }
#empty p   { font-size: 1rem; }

/* ── Sentinel ────────────────────────────── */
#sentinel {
  grid-column: 1 / -1;
  height: 1px;
}

/* ── Toast ───────────────────────────────── */
#toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--toast-bg);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 10px 20px;
  border-radius: 10px;
  font-size: 0.85rem;
  font-weight: 500;
  box-shadow: var(--shadow-md);
  transition: transform 0.3s cubic-bezier(0.34,1.56,0.64,1);
  white-space: nowrap;
  z-index: 200;
  pointer-events: none;
}

#toast.show { transform: translateX(-50%) translateY(0); }

/* ── Responsive ──────────────────────────── */
@media (max-width: 600px) {
  :root { --header-h: auto; }

  .header-inner {
    flex-wrap: wrap;
    padding: 12px 16px;
    gap: 10px;
  }

  .search-wrap  { order: 4; flex-basis: 100%; }
  .count-badge  { order: 1; margin-left: auto; }
  .theme-btn    { order: 2; }
  .toggle-wrap  { order: 3; }

  #grid { grid-template-columns: repeat(auto-fill, minmax(100px, 1fr)); gap: 8px; }

  main { padding: 16px 12px 60px; }

  .card         { padding: 12px 8px 10px; }
  .card-img     { width: 44px; height: 44px; }
  .skeleton-img { width: 44px; height: 44px; }
}

@media (min-width: 601px) and (max-width: 900px) {
  #grid { grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); }
}