/* ─── Variables ─────────────────────────────────────────────────── */
:root {
  --bg:          #0a0c0a;
  --bg-panel:    #0f120f;
  --bg-hover:    #141a14;
  --green:       #39ff84;
  --green-dim:   #1a8040;
  --green-dark:  #0d3d20;
  --cyan:        #00e5cc;
  --amber:       #ffcc00;
  --text:        #c8e6c9;
  --text-dim:    #5a7a5e;
  --border:      #1e3a22;
  --border-bright: #2d5e34;
  --font:        'Courier New', Courier, monospace;
  --glow-green:  0 0 8px rgba(57, 255, 132, 0.4);
  --glow-cyan:   0 0 8px rgba(0, 229, 204, 0.4);
}

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

html { scroll-behavior: smooth; }

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  /* CRT scanline overlay */
  background-image: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.08) 2px,
    rgba(0, 0, 0, 0.08) 4px
  );
}

a { color: var(--cyan); text-decoration: none; }
a:hover { color: var(--green); text-shadow: var(--glow-green); }

main { flex: 1; }

/* ─── Layout ─────────────────────────────────────────────────────── */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ─── Header / Banner ────────────────────────────────────────────── */
.site-header {
  border-bottom: 1px solid var(--border);
  padding: 1rem 0 0;
  background: var(--bg-panel);
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding-bottom: 0.75rem;
}

.site-title {
  font-size: 1rem;
  color: var(--green);
  text-shadow: var(--glow-green);
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
.site-title:hover { color: var(--green); }

.site-nav {
  display: flex;
  gap: 0;
}

.nav-link {
  color: var(--text-dim);
  padding: 0.25rem 0.75rem;
  border: 1px solid transparent;
  transition: color 0.15s, border-color 0.15s, text-shadow 0.15s;
  font-size: 0.85rem;
}
.nav-link:hover,
.nav-link.active {
  color: var(--green);
  border-color: var(--border-bright);
  background: var(--green-dark);
  text-shadow: var(--glow-green);
}
.nav-link.active { color: var(--cyan); }

/* ASCII art network bar */
.header-ascii {
  font-size: 0.7rem;
  line-height: 1.2;
  color: var(--green-dim);
  padding: 0.4rem 0;
  white-space: pre;
  overflow: hidden;
  border-top: 1px solid var(--border);
  user-select: none;
}

/* ─── Footer ─────────────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 1rem 0;
  background: var(--bg-panel);
  margin-top: 3rem;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.footer-left { color: var(--text-dim); font-size: 0.8rem; }

.footer-links {
  display: flex;
  gap: 1.5rem;
  font-size: 0.85rem;
}

.footer-links a {
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 0.3rem;
}
.footer-links a:hover { color: var(--green); }
.footer-links .link-bracket { color: var(--green-dim); }

/* ─── Prompt / Terminal elements ─────────────────────────────────── */
.prompt       { color: var(--green-dim); }
.prompt-cmd   { color: var(--green); }
.prompt-out   { color: var(--text); }
.comment      { color: var(--text-dim); }
.label        { color: var(--cyan); }
.label-amber  { color: var(--amber); }

/* ─── Blinking cursor ────────────────────────────────────────────── */
.cursor {
  display: inline-block;
  width: 0.55em;
  height: 1em;
  background: var(--green);
  vertical-align: text-bottom;
  animation: blink 1s step-end infinite;
  margin-left: 2px;
}
@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

/* ─── Section layout ─────────────────────────────────────────────── */
.section { padding: 2.5rem 0; }
.section + .section { border-top: 1px solid var(--border); }

.section-header {
  margin-bottom: 1.5rem;
}
.section-header .cmd-line {
  margin-bottom: 0.25rem;
}

.cmd-line {
  display: flex;
  gap: 0.5rem;
  align-items: baseline;
  margin-bottom: 0.5rem;
}

/* ─── Home: boot / typewriter ────────────────────────────────────── */
.boot-block {
  padding: 2.5rem 0 1rem;
  min-height: 200px;
}

#typewriter-output {
  white-space: pre-wrap;
  line-height: 1.8;
}

/* ─── Cards (generic panel) ──────────────────────────────────────── */
.card {
  border: 1px solid var(--border);
  background: var(--bg-panel);
  padding: 1.25rem 1.5rem;
  margin-bottom: 1rem;
  transition: border-color 0.15s, background 0.15s;
}
.card:hover {
  border-color: var(--border-bright);
  background: var(--bg-hover);
}

.card-title {
  color: var(--green);
  font-size: 0.95rem;
  margin-bottom: 0.4rem;
  text-shadow: var(--glow-green);
}

.card-meta {
  color: var(--text-dim);
  font-size: 0.78rem;
  margin-bottom: 0.75rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.card-abstract {
  font-size: 0.85rem;
  color: var(--text);
  line-height: 1.65;
  border-left: 2px solid var(--green-dark);
  padding-left: 0.75rem;
  margin-bottom: 0.75rem;
}

.card-footer {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: center;
  font-size: 0.8rem;
}

.tag {
  background: var(--green-dark);
  color: var(--green-dim);
  border: 1px solid var(--border);
  padding: 0.1rem 0.5rem;
  font-size: 0.72rem;
}

.badge {
  padding: 0.1rem 0.5rem;
  font-size: 0.72rem;
  border: 1px solid;
}
.badge-first { color: var(--cyan); border-color: var(--cyan); }
.badge-co    { color: var(--amber); border-color: var(--amber); }

/* ─── Skills / Info grid ─────────────────────────────────────────── */
.info-grid {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.3rem 1.5rem;
  font-size: 0.88rem;
}
.info-key  { color: var(--cyan); }
.info-val  { color: var(--text); }

/* ─── Divider ────────────────────────────────────────────────────── */
.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0;
}

/* ─── Network canvas background ──────────────────────────────────── */
#net-canvas {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.18;
}
body > * { position: relative; z-index: 1; }

/* ─── Placeholder page ───────────────────────────────────────────── */
.placeholder-block {
  padding: 3rem 0;
  text-align: center;
  color: var(--text-dim);
}
.placeholder-block .ascii-art {
  font-size: 0.75rem;
  line-height: 1.3;
  color: var(--green-dark);
  margin-bottom: 1.5rem;
}

/* ─── Responsive ─────────────────────────────────────────────────── */
@media (max-width: 600px) {
  .header-top { flex-direction: column; align-items: flex-start; }
  .site-nav   { flex-wrap: wrap; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
  .info-grid  { grid-template-columns: 1fr; gap: 0.1rem; }
  .info-key::after { content: ':'; }
}