/* Alex — Skylight Cyber showcase */

:root {
  --bg: #0c1017;
  --bg-elevated: #141a24;
  --border: #243044;
  --text: #e8edf5;
  --muted: #8b9bb8;
  --accent: #3dd6c6;
  --accent-dim: #2a9d8f;
  --warning: #f4a261;
  --font-sans: "DM Sans", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
  --radius: 10px;
  --max: 920px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(61, 214, 198, 0.12), transparent),
    radial-gradient(ellipse 60% 40% at 100% 0%, rgba(244, 162, 97, 0.06), transparent);
}

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

a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.skip {
  position: absolute;
  left: -9999px;
}

.skip:focus {
  left: 1rem;
  top: 1rem;
  z-index: 100;
  padding: 0.5rem 1rem;
  background: var(--accent);
  color: var(--bg);
}

.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(12, 16, 23, 0.85);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.logo {
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: var(--text);
}

.logo span {
  color: var(--accent);
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.25rem;
  align-items: center;
}

.nav a {
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
}

.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--accent);
  text-decoration: none;
}

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}

.hero {
  padding: 3rem 0 2.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2.5rem;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin: 0 0 1rem;
}

.hero .tagline {
  font-size: 1.15rem;
  color: var(--muted);
  max-width: 36ch;
  margin: 0 0 1.75rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.65rem 1.15rem;
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
}

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

.btn-primary {
  background: var(--accent);
  color: var(--bg);
}

.btn-primary:hover {
  background: var(--accent-dim);
}

.btn-ghost {
  border-color: var(--border);
  color: var(--text);
  background: transparent;
}

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

.cards {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

a.card {
  display: block;
  color: inherit;
  text-decoration: none;
}

a.card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  text-decoration: none;
}

.card h2 {
  font-size: 1.1rem;
  margin: 0 0 0.5rem;
  letter-spacing: -0.02em;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.card .meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.5rem;
}

.page-title {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  margin: 0 0 0.5rem;
  letter-spacing: -0.03em;
}

.page-intro {
  color: var(--muted);
  font-size: 1.1rem;
  margin: 0 0 2rem;
  max-width: 55ch;
}

.content-block {
  margin-bottom: 2rem;
}

.content-block h2 {
  font-size: 1.2rem;
  margin: 0 0 0.75rem;
  color: var(--text);
}

.content-block ul {
  margin: 0;
  padding-left: 1.25rem;
  color: var(--muted);
}

.content-block li {
  margin-bottom: 0.35rem;
}

.about-grid {
  display: grid;
  gap: 2rem;
  align-items: start;
}

@media (min-width: 720px) {
  .about-grid {
    grid-template-columns: 240px 1fr;
  }
}

.portrait {
  width: 100%;
  max-width: 260px;
  height: auto;
  object-fit: contain;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  display: block;
}

.about-bio h1 {
  margin-top: 0;
}

.site-footer {
  border-top: 1px solid var(--border);
  margin-top: auto;
  padding: 2rem 1.5rem;
  background: var(--bg-elevated);
}

.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 600px) {
  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }
}

.footer-brand {
  font-weight: 700;
}

.footer-brand span {
  color: var(--accent);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.footer-links a {
  color: var(--muted);
}

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

.mono {
  font-family: var(--font-mono);
  font-size: 0.9rem;
}