/* ---------- tokens ---------- */
:root {
  --color-bg: #0d1f14;
  --color-surface: #123a22;
  --color-text: #eaf2ea;
  --color-accent: #6fd694;
  --color-accent-700: #4e9a6b;
  --color-accent-ink: #4e9a6b;
  --color-divider: rgba(234, 242, 234, 0.25);

  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;

  --font-mono: 'Space Mono', ui-monospace, monospace;
}

/* light mode — everything except the terminal, which always stays a phosphor-green CRT */
:root[data-theme="light"] {
  --color-bg: #f3f2f2;
  --color-surface: #eae9e9;
  --color-text: #201f1d;
  --color-accent: #b68235;
  --color-accent-700: #b68235;
  --color-accent-ink: #7d5411;
  --color-divider: rgba(0, 0, 0, 0.16);
}

/* ---------- reset ---------- */
* { box-sizing: border-box; }
body { margin: 0; text-wrap: pretty; font-family: var(--font-mono); }
h1, h2, h3, p { margin: 0; }
img { max-width: 100%; display: block; }

/* ---------- base ---------- */
.page {
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 clamp(20px, 5vw, 72px);
}

.hr {
  margin: 0 0 var(--space-8);
  border: none;
  border-top: 2px solid var(--color-text);
  height: 0;
}

::selection {
  background: color-mix(in srgb, var(--color-accent) 30%, transparent);
}

a {
  color: var(--color-accent-ink);
  text-underline-offset: 3px;
}
a:hover { color: var(--color-accent); }

/* ---------- nav ---------- */
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) clamp(20px, 5vw, 72px);
  border-bottom: 2px solid var(--color-text);
  box-shadow: 0 4px 0 -3px var(--color-divider);
}

.nav-brand {
  font-weight: 700;
  letter-spacing: -0.02em;
  white-space: nowrap;
  flex-shrink: 0;
  margin-right: auto;
}

/* ---------- links & buttons ---------- */
.plain-link {
  text-decoration: none;
  color: var(--color-text);
  border: none;
  background: none;
  padding: 0;
  border-radius: 0;
  font-family: var(--font-mono);
  text-transform: uppercase;
  font-size: 12px;
}
.plain-link:hover { color: var(--color-accent-700); text-decoration: underline; }

.key-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  font-family: var(--font-mono);
  text-transform: uppercase;
  font-size: 12px;
  color: var(--color-text);
  background: var(--color-surface);
  border: 2px solid var(--color-text);
  border-radius: 3px;
  padding: 8px 14px;
  box-shadow:
    3px 3px 0 var(--color-text),
    inset 1px 1px 0 rgba(255, 255, 255, 0.3),
    inset -1px -1px 0 rgba(0, 0, 0, 0.3);
  transition: transform .05s, box-shadow .05s;
  cursor: pointer;
}
.key-btn:hover { color: var(--color-accent-700); }
.key-btn:active {
  transform: translate(3px, 3px);
  box-shadow:
    0 0 0 var(--color-text),
    inset -1px -1px 0 rgba(255, 255, 255, 0.15),
    inset 1px 1px 0 rgba(0, 0, 0, 0.3);
}
.key-btn:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }

.btn-row {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-top: var(--space-6);
}

/* ---------- shared text ---------- */
.eyebrow {
  display: block;
  font-size: 13px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent-700);
  margin: 0 0 var(--space-4);
}

.card-text {
  font-size: 13px;
  line-height: 1.8;
  color: color-mix(in srgb, var(--color-text) 78%, transparent);
}

.footnote {
  font-size: 12px;
  color: color-mix(in srgb, var(--color-text) 60%, transparent);
  margin: var(--space-4) 0 0;
}

/* ---------- hero ---------- */
.hero {
  padding: calc(3.2 * var(--space-6)) 0 calc(2 * var(--space-6));
}

.hero-title {
  font-weight: 700;
  font-size: clamp(26px, 3.2vw, 36px);
  line-height: 1.4;
}
.hero-title span { display: block; }

.lede {
  font-size: 14px;
  line-height: 1.8;
  max-width: 64ch;
  color: color-mix(in srgb, var(--color-text) 82%, transparent);
  margin: var(--space-6) 0 0;
}

/* ---------- terminal ---------- */
.terminal {
  border: 2px solid var(--color-text);
  padding: var(--space-3) var(--space-4);
  margin-top: var(--space-6);
  width: min(480px, 100%);
  background: #0d2b18;
  cursor: text;
}

.terminal-output {
  max-height: 170px;
  overflow-y: auto;
  font-size: 13px;
  line-height: 1.7;
}

.terminal-line {
  white-space: pre-wrap;
  word-break: break-word;
}

.terminal-input-row {
  display: flex;
  align-items: center;
  font-size: 13px;
  color: #6fd694;
  margin-top: 4px;
}

.terminal-hidden-input {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.c64-cursor {
  width: 9px;
  height: 17px;
  background: #6fd694;
  box-shadow: 0 0 6px rgba(111, 214, 148, 0.85);
  display: inline-block;
  margin-left: 2px;
  animation: caret-blink 1s steps(1) infinite;
}

@keyframes caret-blink {
  0%, 45% { opacity: 1; }
  50%, 95% { opacity: 0; }
  100% { opacity: 1; }
}

/* ---------- off the clock / skills sections ---------- */
.section {
  padding: var(--space-6) 0 calc(2 * var(--space-6));
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

.card-title {
  font-weight: 700;
  font-size: 16px;
  text-transform: uppercase;
  margin: 0 0 var(--space-2);
  letter-spacing: 0.02em;
}

/* ---------- about ---------- */
.about-section {
  padding: calc(1.5 * var(--space-6)) 0 calc(2.5 * var(--space-6));
}

.section-title {
  font-weight: 700;
  font-size: 18px;
  margin: 0 0 var(--space-3);
  line-height: 1.4;
}

.about-text { max-width: 50ch; }

/* ---------- skills ---------- */
.skills-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  font-size: 13px;
  line-height: 1.8;
  max-width: 70ch;
}

.skills-label {
  display: inline-block;
  min-width: 110px;
  color: var(--color-accent-700);
}

/* ---------- tagline ---------- */
.tagline-section { text-align: center; }

.tagline {
  font-weight: 700;
  font-size: 18px;
}

.tagline-accent { color: var(--color-accent-700); }

/* ---------- contact ---------- */
.contact-title {
  font-weight: 700;
  font-size: 18px;
  text-transform: uppercase;
}

.contact-text { margin-top: var(--space-2); max-width: 56ch; }

/* ---------- footer ---------- */
.footer {
  padding: var(--space-6) 0 calc(2 * var(--space-6));
  border-top: 2px solid var(--color-text);
}

.footer-cursor {
  display: inline-block;
  width: 8px;
  height: 13px;
  vertical-align: -2px;
  background: currentColor;
  margin-left: 6px;
  animation: caret-blink 1.1s steps(1) infinite;
}

/* ---------- tux easter egg (desktop only, fixed to the viewport) ---------- */
/* base pose is static; js (initTux) drives random walk targets + idle states */
.tux-walker {
  display: none;
  pointer-events: none;
}

.tux-body {
  display: block;
  width: 100%;
  height: 100%;
  overflow: visible;
  transform: none;
}

.tux-eye-cover, .tux-zzz, .tux-wave-arm { display: none; }

.tux-walker.is-sleeping .tux-eye-cover,
.tux-walker.is-sleeping .tux-zzz { display: block; }

.tux-walker.is-waving .tux-wave-arm {
  display: block;
  transform-box: fill-box;
  transform-origin: bottom center;
}

@media (min-width: 721px) {
  .tux-walker {
    display: block;
    position: fixed;
    left: 12px;
    bottom: 10px;
    z-index: 5;
    width: 40px;
    height: 56px;
    transition: left linear;
  }
}

@media (min-width: 721px) and (prefers-reduced-motion: no-preference) {
  .tux-walker.is-walking .tux-body { animation: tux-waddle .5s steps(2) infinite; }
  .tux-walker.is-waving .tux-wave-arm { animation: tux-wave .6s ease-in-out infinite alternate; }
  .tux-walker.is-sleeping .tux-zzz { animation: tux-zzz-float 2.4s ease-in infinite; }
}

@keyframes tux-waddle {
  0% { transform: rotate(-6deg); }
  100% { transform: rotate(6deg); }
}

@keyframes tux-wave {
  0% { transform: rotate(-25deg); }
  100% { transform: rotate(20deg); }
}

@keyframes tux-zzz-float {
  0% { opacity: 0; transform: translate(0, 0); }
  20% { opacity: 1; }
  100% { opacity: 0; transform: translate(3px, -6px); }
}

/* ---------- responsive ---------- */
@media (max-width: 720px) {
  .grid-3 { grid-template-columns: 1fr; gap: var(--space-6); }
  .nav { flex-wrap: wrap; }
}