:root {
  --bg: #0a0a0f;
  --surface: #12121a;
  --surface-2: #1a1a24;
  --surface-3: #242430;
  --accent: #7c3aed;
  --accent-2: #06b6d4;
  --accent-glow: rgba(124, 58, 237, 0.35);
  --text: #f5f5ff;
  --muted: #a0a0b0;
  --border: rgba(255, 255, 255, 0.08);
  --radius: 18px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
  --transition: 0.2s ease;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
  overflow-x: hidden;
}

.bg-glow {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(circle at 20% 10%, rgba(124, 58, 237, 0.18), transparent 35%),
    radial-gradient(circle at 80% 80%, rgba(6, 182, 212, 0.12), transparent 30%);
}

.container {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 60px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 24px;
  backdrop-filter: blur(16px);
  background: rgba(10, 10, 15, 0.75);
  border-bottom: 1px solid var(--border);
}

.logo {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.04em;
  color: var(--text);
}

.logo span {
  color: var(--accent-2);
}

.main-nav {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
}

.main-nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 999px;
  transition: var(--transition);
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--text);
  background: var(--surface-2);
  box-shadow: inset 0 0 0 1px var(--border);
}

.search-wrap input {
  width: 220px;
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 0.9rem;
  outline: none;
  transition: var(--transition);
}

.search-wrap input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.hero {
  text-align: center;
  padding: 64px 0 40px;
}

.hero h1 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2.2rem, 6vw, 4rem);
  font-weight: 700;
  margin: 0 0 12px;
  line-height: 1.05;
  background: linear-gradient(90deg, var(--text), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 520px;
  margin: 0 auto;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.tool-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  display: flex;
  flex-direction: column;
  gap: 14px;
  text-decoration: none;
  color: inherit;
}

.tool-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(124, 58, 237, 0.3);
  border-color: rgba(124, 58, 237, 0.35);
}

.tool-header {
  display: flex;
  align-items: center;
  gap: 12px;
}

.tool-icon {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.18), rgba(6, 182, 212, 0.12));
  font-size: 1.35rem;
  border: 1px solid var(--border);
}

.tool-title {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0;
}

.tool-desc {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0;
  flex-grow: 1;
}

.tool-category {
  display: inline-block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent-2);
  background: rgba(6, 182, 212, 0.1);
  padding: 3px 8px;
  border-radius: 999px;
  font-weight: 700;
}

.site-footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 40px 24px;
  color: var(--muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
}

@media (max-width: 720px) {
  .site-header {
    flex-direction: column;
    align-items: stretch;
  }
  .main-nav {
    justify-content: flex-start;
  }
  .search-wrap input {
    width: 100%;
  }
  .tools-grid {
    grid-template-columns: 1fr;
  }
}

.hidden {
  display: none !important;
}