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

:root {
  --bg: #05070d;
  --bg-secondary: #0b1220;

  --card: #111827;
  --card-hover: #172033;

  --border: #374151;

  --text: #f3f4f6;
  --text-secondary: #cbd5e1;
  --muted: #9ca3af;

  --accent: #1e3a8a;
  --accent-hover: #2563eb;

  --shadow: rgba(0, 0, 0, 0.4);

  --radius: 18px;
  --transition: 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

html.light-theme {
  --bg: #f5f7fb;
  --bg-secondary: #ffffff;

  --card: #ffffff;
  --card-hover: #f1f5f9;

  --border: #e5e7eb;

  --text: #0f172a;
  --text-secondary: #334155;
  --muted: #64748b;

  --accent: #2563eb;
  --accent-hover: #1d4ed8;

  --shadow: rgba(0, 0, 0, 0.08);
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;

  font-family: Inter, system-ui, Arial, sans-serif;

  background:
    radial-gradient(
      circle at top,
      rgba(37, 99, 235, 0.1),
      transparent 45%
    ),
    linear-gradient(
      180deg,
      var(--bg) 0%,
      var(--bg-secondary) 100%
    );

  color: var(--text);
  line-height: 1.6;
}

body,
.project-card,
.category-btn,
.theme-toggle,
#search,
footer {
  transition:
    background-color var(--transition),
    color var(--transition),
    border-color var(--transition),
    box-shadow var(--transition);
}

.hero {
  position: relative;
  text-align: center;
  padding: 5rem 1.5rem 4rem;
}

.hero h1 {
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(4.8rem, 6vw, 5rem);
  font-weight: 800;

  background:
    linear-gradient(
      to right,
      #ffffff,
      #cbd5e1,
      #93c5fd
    );

  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

html.light-theme .hero h1 {
  background:
    linear-gradient(
      to right,
      #0f172a,
      #334155,
      #2563eb
    );

  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-tagline {
  color: var(--text-secondary);
  margin-top: 0.001rem;
  font-size: 0.6rem;
}

.hero-actions {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  display: flex;
  align-items: center;
}

.theme-toggle {
  width: 48px;
  height: 48px;

  border: 1px solid var(--border);
  border-radius: 999px;

  background: var(--card);
  color: var(--text);

  cursor: pointer;

  display: flex;
  align-items: center;
  justify-content: center;

  font-size: 1.1rem;

  transition: var(--transition);
}

.theme-toggle:hover {
  transform: translateY(-2px);

  border-color: var(--accent-hover);

  box-shadow:
    0 8px 20px
    rgba(37, 99, 235, 0.15);
}

.search-container {
  max-width: 650px;
  margin: 1.5rem auto 0;
}

#search {
  width: 100%;
  padding: 1rem 1.25rem;

  border: 1px solid var(--border);
  border-radius: 14px;

  background: var(--card);
  color: var(--text);

  outline: none;

  transition: var(--transition);
}

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

#search:focus {
  border-color: var(--accent-hover);

  box-shadow:
    0 0 0 4px
    rgba(37, 99, 235, 0.15);
}

main {
  max-width: 1300px;
  margin: 0 auto;
  padding: 0 1.25rem 3rem;
}

#categories {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;

  margin-bottom: 2rem;
}

.category-btn {
  padding: 0.65rem 1rem;

  border: 1px solid var(--border);
  border-radius: 999px;

  background: var(--card);
  color: var(--text-secondary);

  cursor: pointer;

  transition: var(--transition);
}

.category-btn:hover {
  transform: translateY(-2px);

  border-color: var(--accent-hover);

  color: var(--text);
}

.category-btn.active {
  background: var(--accent);
  border-color: var(--accent);

  color: #ffffff;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;

  margin-bottom: 1.25rem;
}

.section-header h2 {
  font-size: 1.7rem;
}

#project-count {
  color: var(--muted);
  font-size: 0.9rem;
}

.projects-grid {
  display: grid;

  grid-template-columns:
    repeat(
      auto-fill,
      minmax(290px, 1fr)
    );

  gap: 1.25rem;
}

.project-card {
  background:
    linear-gradient(
      145deg,
      var(--card),
      var(--bg-secondary)
    );

  border: 1px solid var(--border);
  border-radius: var(--radius);

  padding: 1.3rem;

  box-shadow:
    0 10px 25px
    var(--shadow);

  transition: var(--transition);
}

.project-card:hover {
  transform: translateY(-8px);

  border-color:
    var(--accent-hover);
}

.project-category {
  display: inline-block;

  padding: 0.3rem 0.7rem;
  margin-bottom: 0.9rem;

  border-radius: 999px;

  background:
    rgba(
      30,
      58,
      138,
      0.15
    );

  color: #93c5fd;

  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}

.project-title {
  font-size: 1.15rem;
  margin-bottom: 0.6rem;
}

.project-path {
  font-size: 0.88rem;
  color: var(--muted);

  word-break: break-word;
}

.project-link {
  display: inline-flex;

  margin-top: 1rem;

  color: #93c5fd;
  text-decoration: none;

  font-weight: 600;

  transition: var(--transition);
}

.project-link:hover {
  color: #dbeafe;
  transform: translateX(4px);
}

.projects-grid p {
  color: var(--muted);
}

footer {
  margin-top: 4rem;
  padding: 2rem 1rem;

  text-align: center;

  border-top:
    1px solid
    rgba(55, 65, 81, 0.3);

  color: var(--muted);
}

.footer-link {
  color: #93c5fd;
  text-decoration: none;
}

.footer-link:hover {
  color: #dbeafe;
}

::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: #374151;
  border-radius: 999px;
}

::-webkit-scrollbar-thumb:hover {
  background: #4b5563;
}

@media (max-width: 768px) {
  .hero {
    padding: 4rem 1rem 3rem;
  }

  .hero-actions {
    top: 1rem;
    right: 1rem;
  }

  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }

  .theme-toggle {
    width: 44px;
    height: 44px;
    font-size: 1rem;
  }
}