:root {
  color-scheme: dark;
  --bg: #0b0f14;
  --bg-elevated: #121820;
  --text: #e6edf3;
  --muted: #9aa7b2;
  --accent: #4bc0c8;
  --accent-warm: #f2b705;
  --border: #1f2a36;
  --shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
  --transition: 150ms ease;
}

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

body {
  font-family: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.2;
  pointer-events: none;
  z-index: 0;
}

main {
  position: relative;
  z-index: 1;
  padding-top: 96px;
}

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

a:hover,
a:focus {
  color: var(--accent);
}

.container {
  width: min(1100px, 90vw);
  margin: 0 auto;
}

.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 10;
  background: rgba(11, 15, 20, 0.9);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
}

.logo {
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.9rem;
  color: var(--text);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
}

.nav-links li {
  position: relative;
}

.nav-links button,
.nav-links a {
  background: none;
  border: none;
  color: var(--text);
  font-size: 0.95rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
}

.dropdown {
  position: absolute;
  top: 120%;
  left: 0;
  min-width: 200px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 0;
  opacity: 0;
  transform: translateY(-8px);
  pointer-events: none;
  transition: opacity var(--transition), transform var(--transition);
  box-shadow: var(--shadow);
}

.dropdown a {
  display: block;
  padding: 8px 18px;
  color: var(--text);
}

.dropdown a:hover,
.dropdown a:focus {
  color: var(--accent);
  background: rgba(75, 192, 200, 0.08);
}

.nav-item.open .dropdown,
.nav-item:focus-within .dropdown,
.nav-item:hover .dropdown {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.nav-toggle {
  display: none;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  padding: 8px 12px;
  border-radius: 6px;
  cursor: pointer;
}

.hero {
  padding: 80px 0 60px;
}

.hero-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
  align-items: center;
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.2;
}

.hero p {
  color: var(--muted);
  margin-top: 16px;
}

.hero-visual {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  padding: 16px;
  border-radius: 16px;
  box-shadow: var(--shadow);
}

.visual-placeholder {
  width: 100%;
  height: 240px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background:
    radial-gradient(circle at center, rgba(75, 192, 200, 0.4), transparent 55%),
    repeating-linear-gradient(
      90deg,
      rgba(255, 255, 255, 0.06) 0,
      rgba(255, 255, 255, 0.06) 1px,
      transparent 1px,
      transparent 28px
    ),
    repeating-linear-gradient(
      0deg,
      rgba(255, 255, 255, 0.06) 0,
      rgba(255, 255, 255, 0.06) 1px,
      transparent 1px,
      transparent 28px
    );
}

.visual-placeholder.warm {
  background:
    radial-gradient(circle at center, rgba(242, 183, 5, 0.4), transparent 55%),
    repeating-linear-gradient(
      90deg,
      rgba(255, 255, 255, 0.06) 0,
      rgba(255, 255, 255, 0.06) 1px,
      transparent 1px,
      transparent 28px
    ),
    repeating-linear-gradient(
      0deg,
      rgba(255, 255, 255, 0.06) 0,
      rgba(255, 255, 255, 0.06) 1px,
      transparent 1px,
      transparent 28px
    );
}

.caption {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 12px;
}

.section {
  padding: 60px 0;
}

.section h2 {
  font-size: 1.8rem;
  margin-bottom: 16px;
}

.section p {
  color: var(--muted);
  margin-bottom: 16px;
}

.card-grid {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.project-card {
  background: var(--bg-elevated);
  border-radius: 16px;
  padding: 24px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: border-color var(--transition), transform var(--transition);
}

.project-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}

.project-card h3 {
  margin-top: 16px;
  margin-bottom: 12px;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--muted);
}

.form-card {
  background: var(--bg-elevated);
  padding: 32px;
  border-radius: 16px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

form {
  display: grid;
  gap: 16px;
}

label {
  font-size: 0.9rem;
  color: var(--muted);
}

input,
textarea {
  background: #0d131b;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 12px;
  border-radius: 8px;
  font-family: inherit;
}

button.primary {
  background: var(--accent);
  color: #021014;
  border: none;
  padding: 12px 18px;
  border-radius: 999px;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
}

button.primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(75, 192, 200, 0.25);
}

footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
  color: var(--muted);
  font-size: 0.85rem;
}

@media (max-width: 900px) {
  .nav-links {
    position: absolute;
    top: 100%;
    right: 0;
    background: rgba(11, 15, 20, 0.98);
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    padding: 20px;
    border: 1px solid var(--border);
    border-radius: 12px;
    width: min(280px, 90vw);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity var(--transition), transform var(--transition);
  }

  .nav-links.open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .nav-item.open .dropdown,
  .nav-item:hover .dropdown {
    position: static;
    transform: none;
    opacity: 1;
    pointer-events: auto;
    box-shadow: none;
    margin-top: 8px;
  }

  .nav-toggle {
    display: inline-flex;
  }
}