/* =============================================================
   GATechX — homepage stylesheet
   Direction: industrial instrumentation. Graphite plant floor,
   safety amber as the only accent, signage typography.
   ============================================================= */

:root {
  --graphite:  #17191C;
  --steel:     #23272C;
  --concrete:  #EFEDE8;
  --paper:     #FFFFFF;
  --amber:     #FFB300;
  --amber-ink: #1A1200;
  --text:      #14161A;
  --text-soft: #5B6570;
  --line:      #D6D2CA;
  --line-dark: #34383E;

  --f-display: "Archivo", system-ui, sans-serif;
  --f-body:    "Barlow", system-ui, sans-serif;
  --f-mono:    "JetBrains Mono", ui-monospace, monospace;

  --s-1:  clamp(0.78rem, 0.76rem + 0.1vw, 0.84rem);
  --s0:   clamp(1rem, 0.97rem + 0.15vw, 1.08rem);
  --s1:   clamp(1.15rem, 1.05rem + 0.4vw, 1.4rem);
  --s2:   clamp(1.5rem, 1.3rem + 0.9vw, 2.1rem);
  --s3:   clamp(2.1rem, 1.6rem + 2.3vw, 3.6rem);

  --shell: 1180px;
  --pad: clamp(1.1rem, 4vw, 2.5rem);
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--concrete);
  color: var(--text);
  font-family: var(--f-body);
  font-size: var(--s0);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }

h1, h2, h3 {
  font-family: var(--f-display);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.1;
  margin: 0;
}

.shell { width: min(100% - (var(--pad) * 2), var(--shell)); margin-inline: auto; }
.block { padding-block: clamp(2.75rem, 7vw, 5rem); }

.sr {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap;
}
.skip {
  position: absolute; top: -100%; left: 1rem; z-index: 50;
  background: var(--amber); color: var(--amber-ink);
  padding: 0.6rem 1rem; font-weight: 600; text-decoration: none;
}
.skip:focus { top: 0.5rem; }

:focus-visible { outline: 3px solid var(--amber); outline-offset: 2px; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

/* ---------- Masthead ---------------------------------------- */
.masthead {
  background: var(--graphite);
  color: var(--concrete);
  border-bottom: 3px solid var(--amber);
  position: sticky; top: 0; z-index: 30;
}
.masthead__inner {
  display: flex; align-items: center; gap: 1.5rem;
  min-height: 72px;
}
.masthead__end { margin-left: auto; display: flex; align-items: center; gap: 1rem; }

.logo {
  font-family: var(--f-display);
  font-weight: 700; font-size: 1.3rem; letter-spacing: 0.02em;
  text-decoration: none; color: var(--concrete);
  display: inline-flex;
}
.logo em {
  font-style: normal;
  background: var(--amber); color: var(--amber-ink);
  padding-inline: 0.28em; margin-inline: 0.1em;
}
.logo--light { color: var(--concrete); }

.mainnav { display: none; gap: 1.75rem; }
.mainnav a {
  font-family: var(--f-mono);
  font-size: 0.78rem; letter-spacing: 0.09em; text-transform: uppercase;
  text-decoration: none; color: #B9C0C8;
  padding-block: 0.5rem; border-bottom: 2px solid transparent;
}
.mainnav a:hover { color: var(--paper); border-bottom-color: var(--amber); }
@media (min-width: 860px) { .mainnav { display: flex; } }

.lang {
  font-size: 0.9rem; text-decoration: none; color: #B9C0C8;
  border: 1px solid var(--line-dark); padding: 0.25rem 0.7rem;
}
.lang:hover { color: var(--paper); border-color: var(--amber); }

.menu-btn {
  display: grid; gap: 5px; width: 40px; padding: 8px 6px;
  background: none; border: 1px solid var(--line-dark); cursor: pointer;
}
.menu-btn span:not(.sr) { display: block; height: 2px; background: var(--concrete); }
@media (min-width: 860px) { .menu-btn { display: none; } }

.mobilenav {
  display: grid; background: var(--steel);
  border-top: 1px solid var(--line-dark);
  padding: 0.5rem var(--pad) 1rem;
}
.mobilenav a {
  padding: 0.7rem 0; text-decoration: none; color: var(--concrete);
  border-bottom: 1px solid var(--line-dark);
  font-family: var(--f-mono); font-size: 0.85rem;
}
@media (min-width: 860px) { .mobilenav { display: none !important; } }

/* ---------- Hero -------------------------------------------- */
.hero {
  background: var(--graphite);
  color: var(--concrete);
  padding-block: clamp(3rem, 8vw, 6rem);
}
.hero__grid { display: grid; gap: clamp(2rem, 5vw, 4rem); }
@media (min-width: 940px) {
  .hero__grid { grid-template-columns: 1.55fr 1fr; align-items: start; }
}

.kicker {
  font-family: var(--f-mono);
  font-size: 0.74rem; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--amber); margin: 0 0 1rem;
}

.hero h1 {
  font-size: var(--s3);
  max-width: 17ch;
  margin-bottom: 1.25rem;
}
.lede {
  font-size: var(--s1); line-height: 1.5; color: #C3CAD2;
  max-width: 48ch; margin: 0;
}
.hero__actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 2rem; }

.btn {
  font-family: var(--f-display); font-weight: 600; font-size: 0.95rem;
  text-decoration: none; padding: 0.75rem 1.5rem;
  border: 2px solid transparent; display: inline-block;
}
.btn--solid { background: var(--amber); color: var(--amber-ink); }
.btn--solid:hover { background: var(--paper); }
.btn--ghost { border-color: #4A515A; color: var(--concrete); }
.btn--ghost:hover { border-color: var(--amber); color: var(--amber); }

/* Signature: HMI readout panel */
.panel { border: 1px solid var(--line-dark); background: var(--steel); }
.panel__bar {
  display: flex; align-items: center; gap: 0.6rem;
  background: var(--graphite); border-bottom: 1px solid var(--line-dark);
  padding: 0.55rem 1rem;
  font-family: var(--f-mono); font-size: 0.68rem;
  letter-spacing: 0.14em; color: #8D97A2;
}
.dot {
  width: 7px; height: 7px; background: var(--amber); border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(255,179,0,.16);
}
.panel__body { margin: 0; padding: 0.5rem 1rem; }
.readout {
  display: flex; align-items: baseline; gap: 0.75rem;
  padding-block: 0.7rem;
  border-bottom: 1px dashed var(--line-dark);
}
.readout:last-child { border-bottom: 0; }
.readout dt {
  font-family: var(--f-mono); font-size: 0.7rem;
  letter-spacing: 0.1em; text-transform: uppercase; color: #8D97A2;
  min-width: 8.5ch;
}
.readout dd {
  margin: 0; margin-left: auto; text-align: right;
  font-weight: 600; color: var(--concrete); font-size: 0.95rem;
}
.panel__foot {
  margin: 0; padding: 0.75rem 1rem;
  border-top: 1px solid var(--line-dark);
  font-size: 0.82rem; color: #8D97A2;
}

/* Hazard strip — used exactly once, as the seam between the two worlds */
.hazard {
  height: 10px;
  background: repeating-linear-gradient(
    -45deg,
    var(--amber) 0 14px,
    var(--graphite) 14px 28px
  );
}

/* ---------- Section titles ---------------------------------- */
.section-title {
  font-family: var(--f-mono); font-weight: 500;
  font-size: 0.76rem; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--text-soft);
  display: flex; align-items: center; gap: 1rem;
  margin-bottom: 1.75rem;
}
.section-title::after {
  content: ""; flex: 1; height: 1px; background: var(--line);
}

/* ---------- Tags -------------------------------------------- */
.tag {
  display: inline-block; margin: 0 0 0.6rem;
  font-family: var(--f-mono); font-size: 0.68rem;
  letter-spacing: 0.12em; text-transform: uppercase;
  padding: 0.2rem 0.55rem;
}
.tag--home   { background: var(--amber); color: var(--amber-ink); }
.tag--ind    { background: var(--graphite); color: var(--concrete); }
.tag--energy { background: transparent; color: var(--text); border: 1px solid var(--line); }

/* ---------- Lead story -------------------------------------- */
.lead {
  display: grid; gap: clamp(1.25rem, 3vw, 2.5rem);
  background: var(--paper);
  border: 1px solid var(--line);
  padding: clamp(1.25rem, 3vw, 2rem);
}
@media (min-width: 800px) {
  .lead { grid-template-columns: 1.1fr 1fr; align-items: center; }
}
.lead__media { display: block; overflow: hidden; background: var(--line); }
.lead__media img { aspect-ratio: 3 / 2; object-fit: cover; transition: transform .5s ease; }
.lead__media:hover img { transform: scale(1.03); }

.lead__text h3 { font-size: var(--s2); margin-bottom: 0.9rem; }
.lead__text h3 a { text-decoration: none; }
.lead__text h3 a:hover { text-decoration: underline; text-decoration-color: var(--amber); text-decoration-thickness: 3px; text-underline-offset: 4px; }
.lead__text p { color: var(--text-soft); margin: 0 0 0.9rem; }

.byline {
  font-family: var(--f-mono); font-size: var(--s-1);
  color: var(--text-soft); letter-spacing: 0.04em;
  margin: 0;
}

/* ---------- Two tracks -------------------------------------- */
.tracks { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); }
@media (min-width: 820px) { .tracks { grid-template-columns: 1fr 1fr; } }

.track { background: var(--paper); padding: clamp(1.25rem, 3vw, 2rem); }
.track__label { margin-bottom: 1.25rem; }

.feed { list-style: none; margin: 0; padding: 0; }
.feed li {
  display: flex; align-items: baseline; gap: 1rem;
  padding-block: 0.95rem;
  border-bottom: 1px solid var(--line);
}
.feed li:last-child { border-bottom: 0; padding-bottom: 0; }
.feed a {
  font-family: var(--f-display); font-weight: 600; font-size: var(--s1);
  letter-spacing: -0.015em; line-height: 1.25;
  text-decoration: none;
}
.feed a:hover { color: #000; text-decoration: underline; text-decoration-color: var(--amber); text-decoration-thickness: 3px; text-underline-offset: 3px; }
.feed .meta {
  margin-left: auto; white-space: nowrap;
  font-family: var(--f-mono); font-size: var(--s-1); color: var(--text-soft);
}

/* ---------- Cards ------------------------------------------- */
.cards { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); }
@media (min-width: 720px)  { .cards { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1000px) { .cards { grid-template-columns: repeat(3, 1fr); } }

.card {
  background: var(--paper);
  padding: clamp(1.25rem, 3vw, 1.75rem);
  display: flex; flex-direction: column;
}
.card h3 { font-size: var(--s1); margin-bottom: 0.6rem; }
.card h3 a { text-decoration: none; }
.card h3 a:hover { text-decoration: underline; text-decoration-color: var(--amber); text-decoration-thickness: 3px; text-underline-offset: 3px; }
.card p { color: var(--text-soft); margin: 0 0 1rem; font-size: 0.95rem; }
.card .byline { margin-top: auto; }

/* ---------- Newsletter -------------------------------------- */
.signup {
  background: var(--graphite); color: var(--concrete);
  border-top: 3px solid var(--amber);
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
}
.signup__inner { display: grid; gap: 2rem; }
@media (min-width: 900px) {
  .signup__inner { grid-template-columns: 1.2fr 1fr; align-items: center; }
}
.signup h2 { font-size: var(--s2); margin-bottom: 0.75rem; max-width: 22ch; }

.signup__form { display: flex; flex-wrap: wrap; gap: 0.6rem; }
.signup__form input {
  flex: 1 1 15rem; min-width: 0;
  background: var(--steel); border: 1px solid var(--line-dark);
  color: var(--concrete);
  font-family: var(--f-body); font-size: 1rem;
  padding: 0.75rem 1rem;
}
.signup__form input::placeholder { color: #79828C; }
.signup__form input:focus { border-color: var(--amber); }

/* ---------- Footer ------------------------------------------ */
.footer { background: var(--steel); color: #B9C0C8; padding-top: clamp(2.5rem, 6vw, 4rem); }
.footer__inner { display: grid; gap: 2rem; }
@media (min-width: 760px) {
  .footer__inner { grid-template-columns: 2fr 1fr 1fr 1fr; }
}
.footer__brand p { margin: 0.9rem 0 0; max-width: 30ch; font-size: 0.92rem; }

.footer__col { display: grid; align-content: start; gap: 0.55rem; }
.footer__col h3 {
  font-family: var(--f-mono); font-weight: 500;
  font-size: 0.7rem; letter-spacing: 0.16em; text-transform: uppercase;
  color: #79828C; margin-bottom: 0.35rem;
}
.footer__col a { text-decoration: none; font-size: 0.94rem; }
.footer__col a:hover { color: var(--amber); }

.footer__base {
  display: flex; flex-wrap: wrap; gap: 0.5rem 2rem;
  justify-content: space-between;
  margin-top: clamp(2rem, 5vw, 3rem);
  padding-block: 1.25rem;
  border-top: 1px solid var(--line-dark);
  font-family: var(--f-mono); font-size: 0.72rem; letter-spacing: 0.06em;
  color: #79828C;
}
.footer__base p { margin: 0; }