/*
Theme Name: 8Layer Academy
Theme URI: https://www.8layeracademy.com/
Author: 8Layer Academy Editorial
Description: Engineering blueprint schematic theme for a Philippine tech-skills editorial magazine.
Version: 1.0.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: eightlayeracademy
Tags: custom-menu, featured-images, translation-ready
*/

/* ---------- Fonts (self-hosted, variable) ---------- */
@font-face {
  font-family: 'Big Shoulders';
  src: url('assets/fonts/bigshoulders-var.woff2') format('woff2');
  font-weight: 100 900;
  font-display: swap;
}
@font-face {
  font-family: 'Overpass';
  src: url('assets/fonts/overpass-var.woff2') format('woff2');
  font-weight: 100 900;
  font-display: swap;
}
@font-face {
  font-family: 'Overpass Mono';
  src: url('assets/fonts/overpassmono-var.woff2') format('woff2');
  font-weight: 300 800;
  font-display: swap;
}

/* ---------- Tokens ---------- */
:root {
  --dwg-ground: #002b5c;
  --dwg-ground-deep: #00224a;
  --dwg-panel: #063568;
  --dwg-panel-raised: #0a3f78;
  --dwg-line: rgba(155, 214, 236, 0.38);
  --dwg-line-strong: rgba(155, 214, 236, 0.65);
  --dwg-line-faint: rgba(155, 214, 236, 0.16);
  --dwg-ink: #eef6fb;
  --dwg-ink-dim: #b8d2e4;
  --dwg-cyan: #46c8ea;
  --dwg-cyan-deep: #2aa5c8;
  --font-display: 'Big Shoulders', 'Arial Narrow', sans-serif;
  --font-body: 'Overpass', 'Segoe UI', sans-serif;
  --font-anno: 'Overpass Mono', 'Courier New', monospace;
  --frame-w: 1px;
  --sheet-max: 1180px;
  --trace-fast: 160ms;
  --trace-mid: 320ms;
  --trace-slow: 560ms;
}

/* ---------- Reset-ish ---------- */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  background-color: var(--dwg-ground);
  background-image: radial-gradient(rgba(155, 214, 236, 0.10) 1px, transparent 1px);
  background-size: 26px 26px;
  color: var(--dwg-ink);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.7;
  min-height: 100vh;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--dwg-cyan); }
::selection { background: var(--dwg-cyan); color: var(--dwg-ground-deep); }

/* ---------- Type scale ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.035em;
  line-height: 1.12;
  text-transform: uppercase;
  color: var(--dwg-ink);
}
h1 { font-size: clamp(2.3rem, 5.4vw, 3.9rem); }
h2 { font-size: clamp(1.55rem, 3.2vw, 2.2rem); margin: 2.4rem 0 0.9rem; }
h3 { font-size: clamp(1.2rem, 2.2vw, 1.5rem); margin: 1.8rem 0 0.7rem; }
p { margin: 0 0 1.15rem; }
.dwg-anno {
  font-family: var(--font-anno);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--dwg-cyan);
}
.dwg-anno--dim { color: var(--dwg-ink-dim); }

/* ---------- Sheet frame layout ---------- */
.dwg-sheet {
  max-width: var(--sheet-max);
  margin: 0 auto;
  border-left: var(--frame-w) solid var(--dwg-line);
  border-right: var(--frame-w) solid var(--dwg-line);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: linear-gradient(180deg, rgba(0, 34, 74, 0.35), rgba(0, 43, 92, 0) 320px);
}
.dwg-main { flex: 1 0 auto; }
.dwg-wrap { padding: 0 clamp(1.1rem, 4vw, 3.2rem); }

/* ---------- Header ---------- */
.site-header {
  border-bottom: var(--frame-w) solid var(--dwg-line);
  position: relative;
  z-index: 30;
  background: var(--dwg-ground-deep);
}
.site-header__bar {
  display: flex;
  align-items: center;
  gap: 1.4rem;
  padding: 0.85rem clamp(1.1rem, 4vw, 3.2rem);
}
.site-header__brand {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  text-decoration: none;
  color: var(--dwg-ink);
  flex-shrink: 0;
}
.site-header__logo { width: 46px; height: 46px; }
.site-header__id { display: flex; flex-direction: column; line-height: 1.2; }
.site-header__name {
  font-family: var(--font-display);
  font-size: 1.28rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}
.site-header__no { font-size: 0.62rem; }
.site-nav { margin-left: auto; }
.site-nav ul { list-style: none; display: flex; gap: 0.2rem; flex-wrap: wrap; }
.site-nav a {
  font-family: var(--font-anno);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dwg-ink-dim);
  text-decoration: none;
  padding: 0.55rem 0.7rem;
  display: inline-block;
  position: relative;
}
.site-nav a::before { content: '['; margin-right: 0.35em; color: var(--dwg-line-strong); }
.site-nav a::after { content: ']'; margin-left: 0.35em; color: var(--dwg-line-strong); }
.site-nav a:hover, .site-nav .current-menu-item a { color: var(--dwg-cyan); }
.site-header__toggle { display: none; }

/* ---------- Dimension-underline link treatment (content links) ---------- */
.dwg-prose a, .dwg-dimlink {
  color: var(--dwg-cyan);
  text-decoration: none;
  background-image: linear-gradient(var(--dwg-cyan), var(--dwg-cyan));
  background-repeat: no-repeat;
  background-size: 0% 1px;
  background-position: 0 96%;
  padding-bottom: 1px;
  transition: background-size var(--trace-mid) linear, color var(--trace-fast) linear;
}
.dwg-prose a:hover, .dwg-dimlink:hover {
  background-size: 100% 1px;
  color: var(--dwg-ink);
}

/* ---------- Hero (cover photo behind H1, fade to ground) ---------- */
.dwg-hero {
  position: relative;
  border-bottom: var(--frame-w) solid var(--dwg-line);
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  min-height: clamp(340px, 52vh, 560px);
}
.dwg-hero--article { min-height: clamp(280px, 40vh, 440px); }
.dwg-hero__media {
  position: absolute;
  inset: 0;
  z-index: 1;
}
.dwg-hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.55) contrast(1.02) brightness(0.9);
}
.dwg-hero__media::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 2;
  background: rgba(0, 43, 92, 0.42);
  mix-blend-mode: multiply;
}
.dwg-hero__media::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 3;
  background:
    linear-gradient(180deg, rgba(0, 34, 74, 0.55) 0%, rgba(0, 43, 92, 0.18) 34%, rgba(0, 43, 92, 0.62) 72%, var(--dwg-ground) 99%),
    radial-gradient(rgba(155, 214, 236, 0.08) 1px, transparent 1px);
  background-size: 100% 100%, 26px 26px;
}
.dwg-hero__inner {
  position: relative;
  z-index: 4;
  width: 100%;
  padding: clamp(3.2rem, 8vw, 5.5rem) clamp(1.1rem, 4vw, 3.2rem) clamp(1.6rem, 4vw, 2.6rem);
}
.dwg-hero__kicker { display: block; margin-bottom: 0.8rem; }
.dwg-hero__title {
  max-width: 21ch;
  border-left: 3px solid var(--dwg-cyan);
  padding-left: clamp(0.8rem, 2vw, 1.3rem);
  text-shadow: 0 2px 18px rgba(0, 24, 52, 0.75);
}
.dwg-hero__lead {
  max-width: 62ch;
  margin-top: 1.1rem;
  color: var(--dwg-ink-dim);
  font-size: 1.08rem;
}
.dwg-hero__meta { margin-top: 1rem; display: flex; gap: 1.6rem; flex-wrap: wrap; }
.dwg-hero__credit {
  position: absolute;
  right: 0.8rem;
  bottom: 0.5rem;
  z-index: 5;
  font-family: var(--font-anno);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  color: rgba(184, 210, 228, 0.55);
}

/* ---------- Dimension-line divider (signature) ---------- */
.dwg-dim {
  border: 0;
  position: relative;
  height: 1.4rem;
  margin: 2.6rem 0;
  overflow: visible;
}
.dwg-dim::before {
  content: '';
  position: absolute;
  left: 0; right: 0; top: 50%;
  height: 1px;
  background: var(--dwg-line-strong);
}
.dwg-dim::after {
  content: '◄' ' ' attr(data-label) ' ' '►';
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background: var(--dwg-ground);
  padding: 0 0.9rem;
  font-family: var(--font-anno);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: var(--dwg-cyan);
  white-space: nowrap;
}

/* ---------- Panels / sheet cards ---------- */
.dwg-grid {
  display: grid;
  gap: 0;
  border: var(--frame-w) solid var(--dwg-line);
}
.dwg-grid--2 { grid-template-columns: repeat(2, 1fr); }
.dwg-grid--3 { grid-template-columns: repeat(3, 1fr); }
.dwg-cell {
  border: var(--frame-w) solid var(--dwg-line-faint);
  padding: 1.35rem 1.3rem 1.5rem;
  position: relative;
  background: transparent;
  transition: background-color var(--trace-mid) linear;
}
.dwg-cell:hover { background: rgba(10, 63, 120, 0.45); }
.dwg-cell__sheetno {
  display: block;
  margin-bottom: 0.75rem;
  color: var(--dwg-ink-dim);
  font-family: var(--font-anno);
  font-size: 0.62rem;
  letter-spacing: 0.18em;
}
.dwg-cell h3 { margin: 0 0 0.55rem; }
.dwg-cell h3 a { color: var(--dwg-ink); text-decoration: none; transition: color var(--trace-fast) linear; }
.dwg-cell h3 a:hover { color: var(--dwg-cyan); }
.dwg-cell p { color: var(--dwg-ink-dim); font-size: 0.95rem; margin-bottom: 0.9rem; }
.dwg-cell__tag {
  display: inline-block;
  border: 1px solid var(--dwg-line);
  padding: 0.18rem 0.55rem 0.12rem;
  font-family: var(--font-anno);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--dwg-ink-dim);
  text-decoration: none;
}
.dwg-cell__thumb { margin: -1.35rem -1.3rem 1rem; border-bottom: 1px solid var(--dwg-line-faint); }
.dwg-cell__thumb img { width: 100%; aspect-ratio: 16/9; height: auto; object-fit: cover; filter: saturate(0.6) brightness(0.92); }

/* ---------- Section shells ---------- */
.dwg-section { padding: clamp(2rem, 5vw, 3.4rem) 0; }
.dwg-section__head {
  display: flex;
  align-items: baseline;
  gap: 1.1rem;
  margin-bottom: 1.5rem;
}
.dwg-section__head h2 { margin: 0; }
.dwg-section__head::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--dwg-line);
  align-self: center;
}

/* ---------- Prose (article body) ---------- */
.dwg-prose { max-width: 74ch; }
.dwg-prose h2 {
  border-bottom: 1px solid var(--dwg-line);
  padding-bottom: 0.45rem;
}
.dwg-prose ul, .dwg-prose ol { margin: 0 0 1.2rem 1.4rem; }
.dwg-prose li { margin-bottom: 0.45rem; }
.dwg-prose blockquote {
  border-left: 3px solid var(--dwg-cyan);
  background: rgba(6, 53, 104, 0.55);
  padding: 1rem 1.3rem;
  margin: 1.5rem 0;
  color: var(--dwg-ink-dim);
}
.dwg-prose img { border: 1px solid var(--dwg-line); }
.dwg-prose figure { margin: 1.8rem 0; }
.dwg-prose figcaption {
  font-family: var(--font-anno);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dwg-ink-dim);
  padding-top: 0.5rem;
}
.dwg-prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.6rem 0;
  font-size: 0.95rem;
}
.dwg-prose th, .dwg-prose td {
  border: 1px solid var(--dwg-line-faint);
  padding: 0.55rem 0.75rem;
  text-align: left;
}
.dwg-prose th {
  font-family: var(--font-anno);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--dwg-cyan);
  background: rgba(0, 34, 74, 0.6);
}
.dwg-table-scroll { overflow-x: auto; }

/* ---------- Spec plate (site-specific callout, no stock label) ---------- */
.dwg-plate {
  border: 1px solid var(--dwg-line-strong);
  outline: 1px solid var(--dwg-line-faint);
  outline-offset: 4px;
  padding: 1.05rem 1.25rem 0.9rem;
  margin: 1.8rem 0;
  position: relative;
  background: var(--dwg-ground-deep);
}
.dwg-plate::before {
  content: 'DETAIL ' counter(dwg-plate, upper-alpha);
  counter-increment: dwg-plate;
  position: absolute;
  top: -0.62rem;
  left: 0.9rem;
  background: var(--dwg-ground-deep);
  padding: 0 0.5rem;
  font-family: var(--font-anno);
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--dwg-cyan);
}
body { counter-reset: dwg-plate; }
.dwg-plate p:last-child { margin-bottom: 0; }

/* ---------- FAQ (details accordion, revision-triangle toggle) ---------- */
.dwg-faq details {
  border: 1px solid var(--dwg-line-faint);
  border-left: 3px solid var(--dwg-line-strong);
  margin-bottom: 0.7rem;
  background: rgba(0, 34, 74, 0.4);
}
.dwg-faq summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.9rem 1.1rem;
}
.dwg-faq summary::-webkit-details-marker { display: none; }
.dwg-faq summary::before {
  content: '';
  flex-shrink: 0;
  width: 0; height: 0;
  border-left: 7px solid transparent;
  border-right: 7px solid transparent;
  border-bottom: 11px solid var(--dwg-cyan);
  transition: transform var(--trace-mid) linear;
}
.dwg-faq details[open] summary::before { transform: rotate(180deg); }
.dwg-faq summary h3 {
  margin: 0;
  font-size: 1.02rem;
  letter-spacing: 0.05em;
  display: inline;
}
.dwg-faq details > div { padding: 0 1.1rem 1rem 2.9rem; color: var(--dwg-ink-dim); }

/* ---------- Buttons ---------- */
.dwg-btn {
  display: inline-block;
  border: 1px solid var(--dwg-cyan);
  color: var(--dwg-cyan);
  font-family: var(--font-anno);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 0.75rem 1.4rem;
  background: transparent;
  transition: background-color var(--trace-mid) linear, color var(--trace-mid) linear;
}
.dwg-btn:hover { background: var(--dwg-cyan); color: var(--dwg-ground-deep); }

/* ---------- Article lists ---------- */
.dwg-list { list-style: none; }
.dwg-list li {
  display: flex;
  gap: 1.1rem;
  align-items: baseline;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--dwg-line-faint);
}
.dwg-list time { flex-shrink: 0; }
.dwg-list a {
  color: var(--dwg-ink);
  font-weight: 600;
  text-decoration: none;
  transition: color var(--trace-fast) linear;
}
.dwg-list a:hover { color: var(--dwg-cyan); }

/* ---------- Footer title block ---------- */
.site-footer {
  border-top: var(--frame-w) solid var(--dwg-line);
  background: var(--dwg-ground-deep);
  margin-top: 3rem;
}
.site-footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  border-bottom: 1px solid var(--dwg-line-faint);
}
.site-footer__col {
  padding: 1.6rem 1.4rem;
  border-right: 1px solid var(--dwg-line-faint);
}
.site-footer__col:last-child { border-right: 0; }
.site-footer__col h4 { font-size: 0.95rem; margin-bottom: 0.8rem; letter-spacing: 0.12em; }
.site-footer__col p { font-size: 0.86rem; color: var(--dwg-ink-dim); }
.site-footer__col ul { list-style: none; }
.site-footer__col li { padding: 0.25rem 0; display: flex; justify-content: space-between; gap: 0.8rem; }
.site-footer__col li a {
  color: var(--dwg-ink-dim);
  text-decoration: none;
  font-size: 0.88rem;
  transition: color var(--trace-fast) linear;
}
.site-footer__col li a:hover { color: var(--dwg-cyan); }
.site-footer__col li .dwg-anno--dim { font-size: 0.6rem; }
.site-footer__legal {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 0.85rem clamp(1.1rem, 4vw, 3.2rem);
  font-family: var(--font-anno);
  font-size: 0.64rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dwg-ink-dim);
}

/* ---------- Plot-fill reveal (signature; JS adds .dwg-plotted) ---------- */
@media (prefers-reduced-motion: no-preference) {
  .dwg-plot {
    opacity: 0;
    box-shadow: inset 0 0 0 1px var(--dwg-cyan);
    transition: opacity var(--trace-slow) linear, box-shadow 700ms linear 120ms;
  }
  .dwg-plot.dwg-plotted {
    opacity: 1;
    box-shadow: inset 0 0 0 1px rgba(70, 200, 234, 0);
  }
  html.no-js .dwg-plot { opacity: 1; box-shadow: none; }
}

/* ---------- Breadcrumb ---------- */
.dwg-crumb {
  padding: 0.7rem 0;
  font-family: var(--font-anno);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dwg-ink-dim);
}
.dwg-crumb a { color: var(--dwg-ink-dim); text-decoration: none; }
.dwg-crumb a:hover { color: var(--dwg-cyan); }
.dwg-crumb .sep { margin: 0 0.45rem; color: var(--dwg-line-strong); }

/* ---------- Pagination / misc ---------- */
.dwg-pagination { display: flex; gap: 0.5rem; margin: 2rem 0; flex-wrap: wrap; }
.dwg-pagination .page-numbers {
  border: 1px solid var(--dwg-line);
  padding: 0.4rem 0.85rem;
  font-family: var(--font-anno);
  font-size: 0.78rem;
  color: var(--dwg-ink-dim);
  text-decoration: none;
}
.dwg-pagination .page-numbers.current { color: var(--dwg-ground-deep); background: var(--dwg-cyan); border-color: var(--dwg-cyan); }
.screen-reader-text {
  clip: rect(1px, 1px, 1px, 1px);
  position: absolute !important;
  height: 1px; width: 1px;
  overflow: hidden;
}
.dwg-search-form { display: flex; gap: 0.6rem; margin: 1.4rem 0; }
.dwg-search-form input[type="search"] {
  flex: 1;
  background: var(--dwg-ground-deep);
  border: 1px solid var(--dwg-line);
  color: var(--dwg-ink);
  font-family: var(--font-anno);
  padding: 0.7rem 0.9rem;
  font-size: 0.9rem;
}
.dwg-search-form input[type="search"]:focus { outline: 1px solid var(--dwg-cyan); }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .dwg-grid--3 { grid-template-columns: repeat(2, 1fr); }
  .site-footer__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .dwg-grid--2, .dwg-grid--3 { grid-template-columns: 1fr; }
  .site-footer__grid { grid-template-columns: 1fr; }
  .site-footer__col { border-right: 0; border-bottom: 1px solid var(--dwg-line-faint); }
  .site-header__bar { flex-wrap: wrap; }
  .site-header__toggle {
    display: inline-flex;
    margin-left: auto;
    background: none;
    border: 1px solid var(--dwg-line);
    color: var(--dwg-cyan);
    font-family: var(--font-anno);
    font-size: 0.7rem;
    letter-spacing: 0.14em;
    padding: 0.5rem 0.8rem;
    cursor: pointer;
  }
  .site-nav { display: none; width: 100%; margin: 0; }
  .site-nav.is-open { display: block; }
  .site-nav ul { flex-direction: column; gap: 0; border-top: 1px solid var(--dwg-line-faint); padding-top: 0.4rem; }
  html.no-js .site-nav { display: block; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}