/* ==========================================================
   PORTFOLIO — Main Stylesheet
   Theme: Nordic Terminal (dark, monospace accents, sharp)
   ========================================================== */

/* --- Design Tokens --- */
:root {
  --bg:          #0d0f11;
  --bg-surface:  #141618;
  --bg-card:     #1a1d20;
  --border:      #2a2d32;
  --accent:      #7ee8a2;   /* soft terminal green */
  --accent-dim:  #3d7a55;
  --text-primary: #e8eaed;
  --text-secondary: #8b9099;
  --text-muted:  #4a5060;
  --font-mono:   'IBM Plex Mono', monospace;
  --font-serif:  'Fraunces', Georgia, serif;
  --radius:      6px;
  --transition:  200ms ease;
  --max-width:   960px;
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; transition: opacity var(--transition); }
a:hover { opacity: 0.75; }

/* --- Nav --- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  height: 56px;
  background: transparent;
  transition: background var(--transition), border-bottom var(--transition);
  border-bottom: 1px solid transparent;
}
.nav--scrolled {
  background: rgba(13, 15, 17, 0.92);
  backdrop-filter: blur(12px);
  border-bottom-color: var(--border);
}
.nav-logo {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.05em;
}
.nav-links {
  list-style: none;
  display: flex;
  gap: 2rem;
}
.nav-links a {
  font-size: 0.8rem;
  color: var(--text-secondary);
  letter-spacing: 0.06em;
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--text-primary); opacity: 1; }

/* --- Section wrapper shared styles --- */
.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 6rem 2rem;
}
.section-label {
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

/* --- Hero --- */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
#hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 70% 50%, rgba(126,232,162,0.04) 0%, transparent 70%);
  pointer-events: none;
}
.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
  animation: fadeUp 0.8s ease both;
}
.hero-greeting {
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.25rem;
}
.hero-name {
  font-family: var(--font-serif);
  font-size: clamp(2.8rem, 8vw, 5.5rem);
  font-weight: 600;
  line-height: 1.05;
  color: var(--text-primary);
  margin-bottom: 1rem;
}
.hero-sub {
  font-size: 0.95rem;
  color: var(--text-secondary);
  max-width: 480px;
  line-height: 1.8;
  margin-bottom: 2.5rem;
}
.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  transition: background var(--transition), color var(--transition);
}
.hero-cta:hover {
  background: var(--accent);
  color: var(--bg);
  opacity: 1;
}
.hero-scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  animation: bounce 2s infinite;
}

/* --- About --- */
#about { border-bottom: 1px solid var(--border); }
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}
@media (max-width: 640px) { .about-grid { grid-template-columns: 1fr; gap: 2rem; } }
.about-heading {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 300;
  font-style: italic;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  line-height: 1.2;
}
.about-bio p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-size: 0.9rem;
}
.skills-label {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}
.skills-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.chip {
  font-size: 0.75rem;
  padding: 0.3rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 99px;
  color: var(--text-secondary);
  background: var(--bg-card);
  letter-spacing: 0.04em;
}

/* --- Projects --- */
#projects { border-bottom: 1px solid var(--border); }
.projects-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}
.projects-heading {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 300;
  font-style: italic;
}
.projects-github-link {
  font-size: 0.78rem;
  color: var(--text-secondary);
  letter-spacing: 0.06em;
  border-bottom: 1px solid var(--border);
  padding-bottom: 1px;
}
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}
.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: border-color var(--transition), transform var(--transition);
  cursor: pointer;
}
.project-card:hover {
  border-color: var(--accent-dim);
  transform: translateY(-2px);
}
.project-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.02em;
}
.project-desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.6;
  flex: 1;
}
.project-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.72rem;
  color: var(--text-muted);
}
.project-lang::before {
  content: '◆ ';
  color: var(--accent-dim);
}
.project-stars::before { content: '★ '; }
.projects-loading, .projects-error {
  font-size: 0.85rem;
  color: var(--text-muted);
  padding: 2rem 0;
}
.projects-error { color: #e07070; }

/* --- Contact --- */
#contact { }
.contact-heading {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 300;
  font-style: italic;
  margin-bottom: 1rem;
}
.contact-sub {
  color: var(--text-secondary);
  font-size: 0.88rem;
  max-width: 480px;
  margin-bottom: 2rem;
}
.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}
.contact-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border: 1px solid var(--border);
  padding: 0.65rem 1.2rem;
  border-radius: var(--radius);
  font-size: 0.82rem;
  color: var(--text-secondary);
  letter-spacing: 0.04em;
  transition: border-color var(--transition), color var(--transition);
}
.contact-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  opacity: 1;
}

/* --- Footer --- */
.footer {
  display: flex;
  justify-content: space-between;
  padding: 1.5rem 2rem;
  border-top: 1px solid var(--border);
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
}

/* --- Animations --- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(6px); }
}