:root {
  --bg: #0b0b0b;
  --panel: #101820;
  --white: #ffffff;
  --sky: #00aaff;
  --grey: #bfc8d2;
  --muted: #9aa4b2;
  --radius: 8px;
  --container: 1100px;
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  font-family: "Inter", system-ui, sans-serif;
  background: var(--bg);
  color: var(--white);
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 24px;
}

a {
  color: var(--sky);
  text-decoration: none;
}

/* ===== Header ===== */
.site-header {
  border-bottom: 1px solid rgba(255,255,255,0.05);
  background: var(--bg);
  top: 0;
  z-index: 999;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

.brand {
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--sky);
  flex: 1 1 auto;
}

.nav-list {
  list-style: none;
  display: flex;
  gap: 16px;
  margin: 0;
  padding: 0;
}

.nav-list a {
  color: var(--grey);
  font-weight: 500;
}
.nav-list a:hover {
  color: var(--white);
}

/* Search & Menu */
.controls {
  display: flex;
  align-items: center;
  gap: 10px;
}

.search {
  padding: 8px 12px;
  border-radius: 6px;
  border: 1px solid rgba(255,255,255,0.1);
  background: transparent;
  color: var(--white);
}

.menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--white);
  padding: 8px 12px;
  border-radius: 6px;
  cursor: pointer;
}

/* ===== Hero ===== */
.hero {
  text-align: center;
  padding: 60px 20px;
}
.hero h1 {
  font-size: 2.2rem;
  margin-bottom: 10px;
}
.lead {
  color: var(--muted);
  font-size: 1.1rem;
  margin-bottom: 20px;
}
.btn {
  padding: 10px 18px;
  border-radius: 6px;
  font-weight: 600;
  display: inline-block;
}
.btn.primary {
  background: var(--sky);
  color: #000;
}

/* ===== Categories ===== */
.categories h2 {
  margin-bottom: 8px;
}
.pill-wrap {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.pill {
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.1);
  background: transparent;
  color: var(--grey);
  cursor: pointer;
}
.pill.active {
  background: rgba(0,170,255,0.15);
  color: var(--sky);
}

/* ===== Tools Grid ===== */
.tools-grid .grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}
.card {
  border: 1px solid rgba(255,255,255,0.08);
  padding: 20px;
  border-radius: var(--radius);
  background: var(--panel);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.2s ease;
}
.card:hover {
  transform: scale(1.02);
}
.card h3 {
  margin: 0 0 8px;
}
.card p {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 0.95rem;
}
.card-link {
  color: var(--sky);
  font-weight: 600;
}

.empty-state {
  text-align: center;
  color: var(--muted);
  padding: 24px;
}

/* ===== About & Footer ===== */
.about {
  text-align: center;
  padding: 50px 20px;
  color: var(--grey);
}

.site-footer {
  border-top: 1px solid rgba(255,255,255,0.05);
  padding: 20px 0;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}
.footer-links a {
  margin-left: 12px;
  color: var(--grey);
}
.muted {
  color: var(--muted);
}

/* ===== Responsive Fix ===== */
@media (max-width: 900px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .controls {
    width: 100%;
    display: flex;
    justify-content: space-between;
    margin-top: 10px;
  }

  .menu-toggle {
    display: block;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    width: 100%;
    margin-top: 10px;
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 10px;
  }

  .nav-list a {
    padding: 8px 0;
    display: block;
  }

  .search {
    width: 100%;
  }
}

@media (max-width: 600px) {
  .hero h1 {
    font-size: 1.8rem;
  }
  .lead {
    font-size: 1rem;
  }
  .pill-wrap {
    justify-content: center;
  }
}