/* TIMIRON — Steel Meets Silicon. Dark industrial terminal-operator system. */
:root {
  --bg-deep: #0b0f14;      /* near-black navy */
  --bg-panel: #121a24;
  --ink: #e8e4da;
  --ink-dim: #9aa4ae;
  --accent-amber: #f5a623;
  --line: #24303c;
  --font-serif: Georgia, "Times New Roman", serif;
  --font-mono: "Cascadia Code", Consolas, "SF Mono", monospace;
  --font-sans: system-ui, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { background: var(--bg-deep); }
body {
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--bg-deep);
  line-height: 1.65;
  margin: 0;
  -webkit-font-smoothing: antialiased;
  /* .hero uses a 100vw full-bleed breakout; 100vw includes the scrollbar
     gutter, so clip the few px of horizontal overflow it would create. */
  overflow-x: hidden;
}

/* ---------- Header / brand ---------- */
.brandbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 14px;
  padding: 18px 6vw 12px;
  border-bottom: 2px solid var(--accent-amber);
  background: var(--bg-deep);
}
.brandbar a { display: block; line-height: 0; }
/* Wordmark is black serif on a white JPG box: invert -> white-on-black,
   then screen-blend so the black box disappears into the dark header. */
.brandbar img { height: 34px; display: block; filter: invert(1); mix-blend-mode: screen; }
.brand-ai {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--accent-amber);
  letter-spacing: 2px;
  margin-right: auto;
  padding-left: 12px;
}

/* ---------- Nav (CSS-only hamburger under 720px) ---------- */
/* Desktop: burger hidden, so keep the checkbox out of the tab order entirely.
   Mobile (media query below) re-enables it visually-hidden but focusable. */
.nav-toggle { display: none; }
.nav-burger { display: none; }
.sitenav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 24px;
  padding: 10px 6vw;
  border-bottom: 1px solid var(--line);
  background: var(--bg-panel);
}
.sitenav a {
  color: var(--ink-dim);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
}
.sitenav a:hover { color: var(--ink); }
.sitenav a.active { color: var(--accent-amber); border-bottom-color: var(--accent-amber); }

@media (max-width: 720px) {
  .nav-burger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 34px;
    height: 30px;
    cursor: pointer;
    margin-left: 12px;
  }
  .nav-burger span {
    display: block;
    height: 2px;
    background: var(--accent-amber);
    transition: transform 0.2s ease, opacity 0.2s ease;
  }
  .nav-toggle:checked ~ .brandbar .nav-burger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle:checked ~ .brandbar .nav-burger span:nth-child(2) { opacity: 0; }
  .nav-toggle:checked ~ .brandbar .nav-burger span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .sitenav { display: none; flex-direction: column; gap: 0; padding: 0 6vw; }
  .sitenav a { padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 0.9rem; }
  .sitenav a.active { border-bottom-color: var(--line); }
  .nav-toggle:checked ~ .sitenav { display: flex; }
  /* Checkbox is visually hidden but keyboard-focusable; echo its focus ring
     onto the burger label so keyboard users can see where they are. */
  .nav-toggle { display: block; position: absolute; opacity: 0; }
  .nav-toggle:focus-visible ~ .brandbar .nav-burger {
    outline: 2px solid var(--accent-amber);
    outline-offset: 3px;
  }
}

/* Narrow phones (~390px): keep the brandbar on one line, wordmark legible. */
@media (max-width: 480px) {
  .brandbar { padding: 14px 5vw 10px; gap: 10px; }
  .brandbar img { height: 26px; }
  .brand-ai { font-size: 0.8rem; letter-spacing: 1.2px; padding-left: 6px; }
}
@media (max-width: 360px) {
  .brand-ai { display: none; }
}

/* ---------- Content ---------- */
main { max-width: 880px; margin: 0 auto; padding: 12px 6vw 72px; }

h1 {
  font-family: var(--font-serif);
  font-weight: normal;
  color: var(--ink);
  font-size: 2.5rem;
  line-height: 1.15;
  letter-spacing: 0.3px;
  margin: 42px 0 10px;
}
h2 {
  font-family: var(--font-serif);
  font-weight: normal;
  color: var(--ink);
  font-size: 1.55rem;
  margin: 40px 0 12px;
}
h2::after { content: ""; display: block; width: 48px; border-bottom: 2px solid var(--accent-amber); margin-top: 6px; }
h3 { font-family: var(--font-serif); font-weight: normal; color: var(--ink); margin: 0 0 6px; }

.deck { color: var(--ink-dim); font-style: italic; font-family: var(--font-serif); font-size: 1.08rem; }
a { color: var(--accent-amber); }
a:hover { color: var(--ink); }
strong { color: var(--ink); }
p { color: var(--ink); }
hr { border: 0; border-top: 1px solid var(--line); margin: 34px 0; }

/* Mono data treatment: numbers, readouts, inline code */
code, .data {
  font-family: var(--font-mono);
  color: var(--accent-amber);
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 1px 5px;
  font-size: 0.9em;
}
pre { background: var(--bg-panel); border: 1px solid var(--line); padding: 14px 16px; overflow-x: auto; }
pre code { border: 0; background: none; padding: 0; }

/* ---------- Panel cards ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; margin-top: 18px; }
.card {
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-top: 2px solid var(--accent-amber);
  padding: 14px 16px;
}
.card .expansion {
  font-family: var(--font-mono);
  color: var(--accent-amber);
  font-size: 0.72rem;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  margin-bottom: 6px;
}
.card p { color: var(--ink-dim); }

/* ---------- Article lists ---------- */
.article-list { list-style: none; padding: 0; }
.article-list li {
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent-amber);
  padding: 12px 16px;
  margin: 12px 0;
}
.article-list .date { font-family: var(--font-mono); color: var(--ink-dim); font-size: 0.8rem; margin-left: 10px; }

/* ---------- CTA buttons ---------- */
.btn, a.btn {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--bg-deep);
  background: var(--accent-amber);
  border: 1px solid var(--accent-amber);
  padding: 11px 22px;
  margin-top: 8px;
}
.btn:hover, a.btn:hover { background: transparent; color: var(--accent-amber); }

/* ---------- Imagery ---------- */
img.photo { max-width: 100%; height: auto; border: 1px solid var(--line); }
.hero {
  position: relative;
  /* True full-bleed out of the centered 880px main column. */
  width: 100vw;
  margin: 0 calc(50% - 50vw) 20px;
  overflow: hidden;
}
.hero img { display: block; width: 100%; height: auto; max-height: 46vh; object-fit: cover; border: 0; }
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11, 15, 20, 0.15) 0%, rgba(11, 15, 20, 0.55) 70%, var(--bg-deep) 100%);
  pointer-events: none;
}

/* ---------- Footer ---------- */
.foot {
  border-top: 2px solid var(--accent-amber);
  padding: 16px 6vw 48px;
  color: var(--ink-dim);
  font-size: 0.85rem;
  font-family: var(--font-mono);
  letter-spacing: 0.4px;
  background: var(--bg-panel);
}
.foot b { color: var(--ink); }
.foot a { color: var(--accent-amber); }

/* --- Resources: CSS-only radio tabs (no JS) ------------------------------ */
/* .sr-radio: visually hidden but stays in normal focus order — NEVER
   display:none, which would remove the radios from keyboard/AT access. */
.sr-radio { position: absolute; opacity: 0; }
/* Keyboard focus on a hidden radio echoes an amber ring on its tab label. */
.tabs > .tab-radio:nth-of-type(1):focus-visible ~ .tab-labels > label:nth-of-type(1),
.tabs > .tab-radio:nth-of-type(2):focus-visible ~ .tab-labels > label:nth-of-type(2),
.tabs > .tab-radio:nth-of-type(3):focus-visible ~ .tab-labels > label:nth-of-type(3),
.tabs > .tab-radio:nth-of-type(4):focus-visible ~ .tab-labels > label:nth-of-type(4),
.tabs > .tab-radio:nth-of-type(5):focus-visible ~ .tab-labels > label:nth-of-type(5),
.tabs > .tab-radio:nth-of-type(6):focus-visible ~ .tab-labels > label:nth-of-type(6) {
  outline: 2px solid var(--accent-amber);
  outline-offset: 2px;
}
.tab-labels {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  border-bottom: 1px solid var(--line);
  margin: 1.5rem 0 0;
}
.tab-labels label {
  cursor: pointer;
  padding: 0.5rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.5px;
  color: var(--ink-dim);
  border: 1px solid var(--line);
  border-bottom: none;
  border-radius: 4px 4px 0 0;
  background: var(--bg-panel);
}
.tab-panels > .tab-panel { display: none; padding: 1.25rem 0; }
.tabs > .tab-radio:nth-of-type(1):checked ~ .tab-panels > .tab-panel:nth-of-type(1),
.tabs > .tab-radio:nth-of-type(2):checked ~ .tab-panels > .tab-panel:nth-of-type(2),
.tabs > .tab-radio:nth-of-type(3):checked ~ .tab-panels > .tab-panel:nth-of-type(3),
.tabs > .tab-radio:nth-of-type(4):checked ~ .tab-panels > .tab-panel:nth-of-type(4),
.tabs > .tab-radio:nth-of-type(5):checked ~ .tab-panels > .tab-panel:nth-of-type(5),
.tabs > .tab-radio:nth-of-type(6):checked ~ .tab-panels > .tab-panel:nth-of-type(6) { display: block; }
.tabs > .tab-radio:nth-of-type(1):checked ~ .tab-labels > label:nth-of-type(1),
.tabs > .tab-radio:nth-of-type(2):checked ~ .tab-labels > label:nth-of-type(2),
.tabs > .tab-radio:nth-of-type(3):checked ~ .tab-labels > label:nth-of-type(3),
.tabs > .tab-radio:nth-of-type(4):checked ~ .tab-labels > label:nth-of-type(4),
.tabs > .tab-radio:nth-of-type(5):checked ~ .tab-labels > label:nth-of-type(5),
.tabs > .tab-radio:nth-of-type(6):checked ~ .tab-labels > label:nth-of-type(6) {
  color: var(--accent-amber);
  border-color: var(--accent-amber);
  background: var(--bg-deep);
}
.res-list { list-style: none; margin: 0; padding: 0; }
.res-entry {
  display: flex;
  gap: 1rem;
  align-items: baseline;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--line);
}
.res-ref {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-amber);
  white-space: nowrap;
  min-width: 9.5rem;
}
.res-body b { color: var(--ink); font-family: var(--font-serif); }
.res-body p { margin: 0.25rem 0 0; color: var(--ink-dim); }
.res-note { color: var(--ink-dim); font-size: 0.85rem; margin-top: 1.5rem; }
@media (max-width: 720px) {
  .res-entry { flex-direction: column; gap: 0.25rem; }
  .res-ref { min-width: 0; }
}