/* ==========================================================
   Design tokens
   ========================================================== */
:root {
  --bg:          #0a1e15;
  --bg-alt:      #0f2a1d;
  --panel:       #123024;
  --rule:        rgba(238, 242, 234, 0.10);
  --rule-strong: rgba(238, 242, 234, 0.18);

  --ink:         #eef2ea;
  --ink-dim:     #9db3a4;
  --ink-faint:   #6f8a79;

  --green:       #4f9e6c;
  --green-bright:#8ee6a8;

  --font-display: 'Space Grotesk', sans-serif;
  --font-body:    'Inter', sans-serif;
  --font-mono:    'JetBrains Mono', monospace;

  --maxw: 72rem;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

body {
  margin: 0;
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-alt) 100%);
  background-attachment: fixed;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }
h1, h2, h3 { font-family: var(--font-display); margin: 0; }
p { margin: 0; }
dl, dt, dd, ol, ul { margin: 0; padding: 0; }
li { list-style: none; }

::selection { background: var(--green); color: var(--bg); }

:focus-visible {
  outline: 2px solid var(--green-bright);
  outline-offset: 3px;
  border-radius: 2px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.1rem clamp(1.25rem, 4vw, 3rem);
  background: rgba(10, 30, 21, 0.82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rule);
}

.prompt {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  white-space: nowrap;
}
.prompt-user   { color: var(--green-bright); }
.prompt-at,
.prompt-colon  { color: var(--ink-faint); }
.prompt-host   { color: var(--green); }
.prompt-path   { color: var(--ink-dim); margin-left: 2px; }
.prompt-cursor {
  display: inline-block;
  width: 8px; height: 1.05em;
  background: var(--green-bright);
  margin-left: 4px;
  vertical-align: -0.15em;
  animation: blink 1.1s steps(1) infinite;
}

.nav {
  display: flex;
  gap: clamp(1rem, 2.4vw, 2.2rem);
  font-family: var(--font-mono);
  font-size: 0.88rem;
}
.nav a {
  text-decoration: none;
  color: var(--ink-dim);
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: color .15s ease, border-color .15s ease;
}
.nav a:hover, .nav a:focus-visible { color: var(--ink); border-color: var(--green); }
.nav-cmd { color: var(--green-bright); margin-right: 0.35em; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle span { width: 22px; height: 2px; background: var(--ink); display: block; }

.section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(4rem, 9vw, 7rem) clamp(1.25rem, 4vw, 3rem);
}

.section-cmd {
  font-family: var(--font-mono);
  color: var(--green-bright);
  font-size: 0.85rem;
  margin-bottom: 0.6rem;
}
.section-cmd::before { content: "> "; color: var(--ink-faint); }

.section-title {
  font-size: clamp(1.6rem, 3.4vw, 2.3rem);
  font-weight: 700;
  margin-bottom: clamp(2rem, 5vw, 3.2rem);
  letter-spacing: -0.01em;
}

.hero { padding-top: clamp(3rem, 8vw, 5.5rem); }

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}

.terminal {
  background: var(--panel);
  border: 1px solid var(--rule-strong);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 30px 60px -25px rgba(0, 0, 0, 0.6);
}
.terminal-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 0.9rem;
  background: rgba(238, 242, 234, 0.04);
  border-bottom: 1px solid var(--rule);
}
.dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--ink-faint);
  opacity: 0.5;
}
.terminal-title {
  margin-left: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-faint);
}
.terminal-body {
  padding: clamp(1.3rem, 3vw, 2rem);
  font-family: var(--font-mono);
  font-size: clamp(0.92rem, 1.6vw, 1.05rem);
  min-height: 220px;
}
.tline { color: var(--ink); }
.tprompt { color: var(--green-bright); }
.tcursor {
  display: inline-block;
  width: 0.55em; height: 1em;
  background: var(--green-bright);
  vertical-align: -0.15em;
  animation: blink 1s steps(1) infinite;
}
.toutput {
  margin-top: 1rem;
  color: var(--ink-dim);
  white-space: pre-wrap;
}
.toutput strong { color: var(--ink); font-weight: 500; }

.manpage {
  background: var(--panel);
  border: 1px solid var(--rule-strong);
  border-radius: 10px;
  padding: clamp(1.5rem, 3vw, 2rem);
}
.manpage-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-faint);
  letter-spacing: 0.08em;
  margin: 0 0 1.3rem;
  padding-bottom: 0.9rem;
  border-bottom: 1px solid var(--rule);
}
.manpage dt {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--green);
  margin-top: 1.1rem;
}
.manpage dt:first-child { margin-top: 0; }
.manpage dd {
  margin: 0.3rem 0 0;
  font-size: 0.98rem;
  color: var(--ink);
}
.manpage dd em { color: var(--ink-dim); font-style: normal; }

.filelines {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--rule);
}
.filelines li {
  display: grid;
  grid-template-columns: 3rem 1fr;
  gap: clamp(1rem, 3vw, 2rem);
  padding: clamp(1.4rem, 3vw, 2rem) 0;
  border-bottom: 1px solid var(--rule);
}
.lineno {
  font-family: var(--font-mono);
  color: var(--ink-faint);
  font-size: 0.85rem;
  padding-top: 0.2rem;
}
.linecontent h3 {
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  margin-bottom: 0.5rem;
}
.linecontent p {
  color: var(--ink-dim);
  max-width: 42rem;
}

.ls-table {
  display: flex;
  flex-direction: column;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  border-top: 1px solid var(--rule);
}
.ls-row {
  display: grid;
  grid-template-columns: 8.5rem 4.5rem 6rem 1fr;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--rule);
  align-items: start;
}
.ls-head {
  color: var(--ink-faint);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  padding-bottom: 0.8rem;
}
.ls-perm { color: var(--green); }
.ls-size, .ls-date { color: var(--ink-faint); }
.ls-name { font-family: var(--font-body); color: var(--ink); }
.ls-name strong { font-family: var(--font-mono); color: var(--ink); display: block; margin-bottom: 0.3rem; }
.ls-desc { display: block; color: var(--ink-dim); font-size: 0.92rem; margin-top: 0.2rem; max-width: 40rem; }

.footer {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(3rem, 7vw, 5rem) clamp(1.25rem, 4vw, 3rem) clamp(2.5rem, 5vw, 4rem);
  border-top: 1px solid var(--rule);
}
.contact-grid {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(1rem, 3vw, 2.5rem);
  margin: 1.5rem 0 2.5rem;
}
.contact-link {
  font-family: var(--font-mono);
  text-decoration: none;
  font-size: 1rem;
  color: var(--ink);
  border-bottom: 1px solid var(--rule-strong);
  padding-bottom: 3px;
  transition: color .15s ease, border-color .15s ease;
}
.contact-link:hover, .contact-link:focus-visible { color: var(--green-bright); border-color: var(--green-bright); }

.footer-fine {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-faint);
}
.footer-note { color: var(--ink-faint); }

@keyframes blink {
  0%, 49%   { opacity: 1; }
  50%, 100% { opacity: 0; }
}

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; }
  .ls-row { grid-template-columns: 1fr; gap: 0.3rem; }
  .ls-head { display: none; }
  .ls-perm, .ls-size, .ls-date { display: inline-block; margin-right: 0.8rem; }
}

@media (max-width: 720px) {
  .nav {
    position: absolute;
    top: 100%; left: 0; right: 0;
    flex-direction: column;
    background: var(--bg-alt);
    border-bottom: 1px solid var(--rule);
    padding: 1rem clamp(1.25rem, 4vw, 3rem) 1.5rem;
    display: none;
  }
  .nav.is-open { display: flex; }
  .nav-toggle { display: flex; }
  .prompt { font-size: 0.8rem; }
}