:root {
  --bg: #0d1117;
  --bg-raised: #131820;
  --border: #21262d;
  --text: #c9d1d9;
  --text-dim: #8b949e;
  --heading: #e6edf3;
  --accent: #3ecf8e;
  --accent-dim: #2e9d6d;
  --mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, Roboto, Helvetica, Arial, sans-serif;
  --max-width: 780px;
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: 6rem;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  position: relative;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}

body::before {
  background:
    radial-gradient(circle at 15% 20%, rgba(62, 207, 142, 0.10), transparent 40%),
    radial-gradient(circle at 85% 10%, rgba(62, 207, 142, 0.07), transparent 38%),
    radial-gradient(circle at 50% 90%, rgba(62, 207, 142, 0.06), transparent 45%);
  background-size: 160% 160%;
  animation: drift 28s ease-in-out infinite alternate;
}

body::after {
  background-image:
    linear-gradient(rgba(230, 237, 243, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(230, 237, 243, 0.025) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(circle at 50% 20%, black, transparent 75%);
  -webkit-mask-image: radial-gradient(circle at 50% 20%, black, transparent 75%);
}

@keyframes drift {
  0% { background-position: 0% 0%; }
  100% { background-position: 100% 100%; }
}

@media (prefers-reduced-motion: reduce) {
  body::before { animation: none; }
}

h1, h2, h3, h4, .logo, .eyebrow, .tag-label, .tags, .btn, .badge {
  font-family: var(--mono);
}

h1, h2, h3, h4 {
  color: var(--heading);
  font-weight: 700;
  margin: 0 0 var(--space-2);
}

p {
  margin: 0 0 var(--space-2);
  max-width: 65ch;
}

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

a:hover, a:focus-visible {
  text-decoration: underline;
}

.cursor {
  color: var(--accent);
  animation: blink 1.1s steps(1) infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .cursor { animation: none; }
}

/* Topbar */

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) var(--space-3);
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--border);
}

.logo {
  color: var(--heading);
  font-weight: 700;
  font-size: 0.95rem;
}

.logo:hover {
  text-decoration: none;
}

.topbar-cta {
  font-size: 0.85rem;
  color: var(--text-dim);
  border: 1px solid var(--border);
  padding: 0.35rem 0.85rem;
  border-radius: 6px;
}

.topbar-cta:hover {
  color: var(--accent);
  border-color: var(--accent-dim);
  text-decoration: none;
}

/* Layout */

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

.section {
  padding: var(--space-5) 0;
  border-top: 1px solid var(--border);
}

.tag-label {
  color: var(--text-dim);
  font-size: 0.85rem;
  margin-right: var(--space-1);
}

/* Hero */

.hero {
  padding: var(--space-6) 0 var(--space-5);
}

.eyebrow {
  color: var(--accent);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: var(--space-2);
}

.hero h1 {
  font-size: clamp(2rem, 6vw, 3rem);
  margin-bottom: var(--space-2);
}

.hero-tagline {
  color: var(--text-dim);
  font-size: 1.15rem;
  max-width: 46ch;
  margin-bottom: var(--space-4);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
}

.hero-links {
  display: flex;
  gap: var(--space-3);
  font-size: 0.95rem;
}

.hero-links a {
  color: var(--text-dim);
}

.hero-links a:hover {
  color: var(--accent);
}

/* Buttons */

.btn {
  display: inline-block;
  padding: 0.7rem 1.4rem;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
}

.btn-primary {
  background: var(--accent);
  color: #06120c;
}

.btn-primary:hover {
  background: var(--accent-dim);
  text-decoration: none;
}

.btn-secondary {
  background: transparent;
  color: var(--accent);
  border-color: var(--border);
  margin-top: var(--space-2);
}

.btn[hidden] {
  display: none;
}

.btn-secondary:hover {
  border-color: var(--accent-dim);
}

/* Work cards */

.work-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

.card {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: var(--space-3);
}

.card-featured {
  border-color: var(--accent-dim);
}

.card-secondary {
  background: transparent;
}

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.card-head h3 {
  margin: 0;
  font-size: 1.1rem;
}

.card-sub {
  color: var(--text-dim);
  font-size: 0.9rem;
  margin: 0.2rem 0 var(--space-2);
}

.badge {
  font-size: 0.7rem;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-dim);
  white-space: nowrap;
}

.badge-accent {
  color: var(--accent);
  border-color: var(--accent-dim);
}

.tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0;
  margin: var(--space-2) 0 0;
}

.tags li {
  font-size: 0.72rem;
  color: var(--text-dim);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.2rem 0.5rem;
}

.card-link {
  display: inline-block;
  margin-top: var(--space-2);
  font-size: 0.85rem;
}

/* Skills */

.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}

.skill-group h4 {
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 0.35rem;
}

.skill-group p {
  color: var(--text-dim);
  font-size: 0.92rem;
  margin: 0;
}

/* Contact */

.contact-intro {
  color: var(--text-dim);
}

.contact-form {
  max-width: 480px;
  margin: var(--space-3) 0 var(--space-4);
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-bottom: var(--space-2);
}

.form-row label {
  font-size: 0.8rem;
  color: var(--text-dim);
  font-family: var(--mono);
}

.form-row input,
.form-row textarea {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.6rem 0.75rem;
  color: var(--heading);
  font-family: var(--sans);
  font-size: 0.95rem;
  resize: vertical;
}

.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--accent-dim);
}

.form-status {
  margin-top: var(--space-2);
  font-size: 0.85rem;
  color: var(--accent);
  min-height: 1.2em;
}

.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-size: 0.9rem;
}

/* Footer */

.footer {
  border-top: 1px solid var(--border);
  padding: var(--space-3);
  text-align: center;
  color: var(--text-dim);
  font-size: 0.8rem;
}

/* Responsive */

@media (min-width: 640px) {
  .work-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .card-featured {
    grid-column: 1 / -1;
  }
}

@media (max-width: 480px) {
  .skills-grid {
    grid-template-columns: 1fr;
  }
  .hero-actions {
    align-items: flex-start;
    flex-direction: column;
  }
}