:root {
  --bg: #050816;
  --bg-alt: #0b1020;
  --accent: #4f46e5;
  --accent-soft: rgba(79, 70, 229, 0.12);
  --text: #f9fafb;
  --muted: #9ca3af;
  --card-bg: #111827;
  --border: #1f2933;
  --radius-lg: 1.25rem;
  --radius-sm: 0.5rem;
  --shadow-soft: 0 18px 40px rgba(0, 0, 0, 0.35);
  --max-width: 760px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  background: radial-gradient(circle at top, #1f2937, #020617 55%);
  color: var(--text);
  line-height: 1.6;
}

/* Layout */

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */

.site-header {
  padding: 3.5rem 0 2rem;
  text-align: center;
}

.site-title {
  margin: 0;
  font-size: clamp(2.25rem, 4vw, 3rem);
  letter-spacing: 0.03em;
}

.site-subtitle {
  margin-top: 0.75rem;
  color: var(--muted);
  font-size: 0.95rem;
}

/* Navigation */

.site-nav {
  margin-top: 1.75rem;
  display: inline-flex;
  gap: 1.25rem;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(148, 163, 184, 0.25);
  backdrop-filter: blur(14px);
}

.site-nav a {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  text-decoration: none;
  padding: 0.25rem 0;
  position: relative;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.15rem;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.2s ease;
}

.site-nav a:hover {
  color: var(--text);
}

.site-nav a:hover::after {
  width: 100%;
}

/* Main sections */

main {
  padding-bottom: 3rem;
}

section {
  margin-bottom: 2.5rem;
  background: linear-gradient(135deg, var(--card-bg), #020617);
  border-radius: var(--radius-lg);
  padding: 1.75rem 1.5rem 1.5rem;
  border: 1px solid rgba(148, 163, 184, 0.12);
  box-shadow: var(--shadow-soft);
}

section h2 {
  margin-top: 0;
  margin-bottom: 0.75rem;
  font-size: 1.25rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}

/* Projects */

.project-card {
  background: var(--bg-alt);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.25rem 1rem;
  border: 1px solid rgba(148, 163, 184, 0.2);
  box-shadow: var(--shadow-soft);
}

.project-card h3 {
  margin-top: 0;
  margin-bottom: 0.25rem;
  font-size: 1.1rem;
}

.project-status {
  margin: 0 0 0.75rem;
  font-size: 0.85rem;
  color: var(--accent);
  background: var(--accent-soft);
  display: inline-block;
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
}

.project-card ul {
  margin: 0.75rem 0 0;
  padding-left: 1.1rem;
  font-size: 0.9rem;
  color: var(--muted);
}

/* Learning log */

.learning-list {
  margin: 0.75rem 0 0;
  padding-left: 1.1rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.learning-list li {
  margin-bottom: 0.4rem;
}

/* Links */

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

a:hover {
  text-decoration: underline;
}

/* Footer */

.site-footer {
  border-top: 1px solid rgba(148, 163, 184, 0.2);
  padding: 1.25rem 0 2rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
}

/* Small screens */

@media (max-width: 480px) {
  .site-nav {
    gap: 0.75rem;
    padding-inline: 0.75rem;
  }

  .site-nav a {
    font-size: 0.75rem;
  }
}