:root {
  --bg: linear-gradient(120deg, #dbeafe 0%, #f0f4ff 100%);
  --fg: #fff;
  --text: #213045;
  --accent: #2548ae;
  --shadow: #acbcf0cc;
  --card-bg: #e5edff;
  --card-hover: #bdd4fd;
  --desc: #4461a8;
  --footer: #b4bad6;
}
body.dark {
  --bg: linear-gradient(120deg, #202f4b 0%, #141b28 100%);
  --fg: #151c27;
  --text: #e2e8f0;
  --accent: #76aaff;
  --shadow: #0d1729cc;
  --card-bg: #22335c;
  --card-hover: #2c4878;
  --desc: #9dc6ff;
  --footer: #435470;
}
body {
  background: var(--bg);
  font-family: 'Segoe UI', Arial, sans-serif;
  margin: 0;
  color: var(--text);
  transition: background 0.4s;
}
.container {
  max-width: 700px;
  margin: 40px auto;
  background: var(--fg);
  border-radius: 24px;
  box-shadow: 0 6px 30px 0 var(--shadow);
  padding: 32px 24px 20px 24px;
  min-height: 80vh;
  display: flex;
  flex-direction: column;
}
header {
  margin-bottom: 32px;
  position: relative;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.5rem;
  font-weight: bold;
  margin-bottom: 4px;
}
.logo-circle {
  width: 40px;
  height: 40px;
  display: inline-flex;
  background: var(--accent);
  color: #fff;
  border-radius: 50%;
  justify-content: center;
  align-items: center;
  font-size: 1.4em;
  font-family: 'Segoe UI', Arial, sans-serif;
  font-weight: bold;
  box-shadow: 0 1px 8px #bdd4fd40;
  letter-spacing: 1px;
}
.logo-title { letter-spacing: 1.2px; }
#theme-toggle {
  position: absolute;
  top: 2px; right: 2px;
  background: none;
  border: none;
  font-size: 1.35em;
  cursor: pointer;
  transition: color 0.2s;
  color: var(--accent);
}
#theme-toggle:hover { color: #2d4ec9; }
.subtitle {
  color: var(--desc);
  font-size: 1.1rem;
  margin: 6px 0 12px 0;
}
.about {
  background: var(--card-bg);
  color: var(--accent);
  border-radius: 14px;
  padding: 11px 18px;
  font-size: 0.97em;
  margin-bottom: 6px;
  margin-top: 3px;
  box-shadow: 0 1px 6px #bdd4fd23;
}
main h2 { font-size: 1.3em; margin-bottom: 12px;}
.categories {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-top: 18px;
}
.cat-card {
  background: var(--card-bg);
  border-radius: 18px;
  padding: 22px 28px 16px 28px;
  font-size: 1.09rem;
  color: var(--text);
  text-decoration: none;
  box-shadow: 0 2px 14px #bdd4fd23;
  transition: 0.15s;
  display: flex;
  flex-direction: column;
  gap: 8px;
  border: 1.5px solid transparent;
}
.cat-card:hover {
  background: var(--card-hover);
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-2px) scale(1.025);
}
.cat-title {
  font-weight: 600;
  font-size: 1.09em;
}
.cat-desc {
  font-size: 0.96em;
  color: var(--desc);
}
footer {
  margin-top: auto;
  text-align: center;
  color: var(--footer);
  font-size: 0.98rem;
  padding-top: 18px;
}
footer a { color: var(--footer); text-decoration: underline dotted;}
@media (max-width: 600px) {
  .container { padding: 13px 1vw 9px 1vw; }
  .cat-card { padding: 13px 7px 11px 11px; font-size: 0.99rem;}
  .logo { font-size: 1.11rem;}
  .logo-circle { width: 32px; height: 32px; font-size: 1.07em;}
}
.version-badge {
  background: var(--accent);
  color: #fff;
  border-radius: 10px;
  padding: 2px 10px 2px 9px;
  font-size: 0.83em;
  font-weight: 600;
  margin-left: 9px;
  letter-spacing: 0.02em;
  box-shadow: 0 1px 4px #bdd4fd33;
  display: flex;
  align-items: center;
  gap: 5px;
}
.beta {
  background: #ffd41b;
  color: #213045;
  border-radius: 6px;
  padding: 1px 7px;
  font-size: 0.79em;
  font-weight: 700;
  margin-left: 5px;
  letter-spacing: 0.04em;
}
@media (max-width: 700px) {
  html, body {
    background: var(--fg);
        height: 100%;
  }
  .container {
    max-width: 100vw;
    border-radius: 0 !important;
    margin: 0 !important;
    box-shadow: none !important;
    padding: 0 0 24px 0 !important;
    background: var(--fg) !important;
    min-height: 0;
  }
  header {
    margin-bottom: 18px !important;
    padding: 18px 12px 0 12px !important;
    background: none;
    box-shadow: none;
  }
  .logo {
    font-size: 1.1em;
    gap: 7px;
    line-height: 1.12;
    flex-wrap: wrap;
    margin-bottom: 2px;
  }
  .logo-circle {
    width: 28px;
    height: 28px;
    font-size: 1em;
    box-shadow: none;
    border-radius: 7px;
    background: var(--accent);
    color: #fff;
  }
  .version-badge, .beta {
    font-size: 0.80em;
    margin-left: 4px;
    padding: 1.5px 6px 1.5px 6px;
    gap: 2px;
    border-radius: 5px;
    box-shadow: none;
    background: none;
    color: #fff; 
  }
  .subtitle {
    font-size: 1em;
    margin: 2px 0 7px 0;
    color: var(--desc);
  }
  .about {
    font-size: 0.95em;
    padding: 8px 10px;
    border-radius: 6px;
    margin-top: 5px;
    margin-bottom: 7px;
    background: var(--card-bg);
    box-shadow: none;
    color: var(--accent);
  }
  main {
    padding: 0 12px;
  }
  main h2 {
    font-size: 1.13em;
    margin-bottom: 9px;
    margin-top: 10px;
    color: var(--text);
  }
  #search {
    font-size: 1em !important;
    padding: 7px 10px !important;
    margin-top: 8px !important;
    width: 100% !important;
    border-radius: 7px !important;
    box-sizing: border-box;
    background: var(--card-bg);
    border: 1.5px solid var(--card-hover);
    color: var(--text);
  }
  .categories {
    gap: 8px;
    margin-top: 10px;
  }
  .cat-card {
    background: var(--card-bg);
    border-radius: 7px;
    padding: 12px 10px 9px 12px;
    font-size: 1em;
    box-shadow: none;
    border: 1px solid var(--card-hover);
    gap: 3px;
    margin-bottom: 0;
    transition: background 0.13s, border 0.13s;
    color: var(--text);
  }
  .cat-card:hover {
    background: var(--card-hover);
    color: var(--accent);
    border-color: var(--accent);
    transform: none;
  }
  .cat-title {
    font-weight: 600;
    font-size: 1em;
    margin-bottom: 1px;
    color: var(--accent);
  }
  .cat-desc {
    font-size: 0.96em;
    color: var(--desc);
  }
  footer {
    font-size: 0.98em;
    margin: 0 0 0 0;
    background: none;
    border-radius: 0;
    padding: 18px 0 7px 0;
    color: var(--footer);
    text-align: center;
    width: 100vw;
  }
}