/* IJYE — The Engineering Record
   Design tokens and shared components for the static GitHub Pages draft. */
:root {
  --navy: #071827;
  --navy-2: #0b2235;
  --blue: #168bfa;
  --orange: #ff792b;
  --teal: #0e897c;
  --paper: #f2f5f7;
  --white: #ffffff;
  --ink: #102033;
  --muted: #53677a;
  --line: rgba(16,32,51,.18);
  --line-light: rgba(220,239,255,.18);
  --font-display: "Space Grotesk", sans-serif;
  --font-body: "Inter", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;
  --content: 1440px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 90px; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--font-body); -webkit-font-smoothing: antialiased; }
a { color: inherit; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--orange); outline-offset: 4px; }
::selection { background: var(--blue); color: white; }
.skip-link { position: absolute; top: -100px; left: 1rem; z-index: 100; padding: .8rem 1rem; background: var(--orange); color: var(--navy); font-weight: 700; }
.skip-link:focus { top: 1rem; }
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(7,24,39,.97); color: var(--white); border-bottom: 1px solid rgba(22,139,250,.55); backdrop-filter: blur(14px); }
.header-inner { max-width: var(--content); min-height: 82px; padding: 0 5.2%; margin: auto; display: flex; align-items: center; justify-content: space-between; gap: 2rem; }
.brand { display: inline-flex; align-items: center; gap: 18px; text-decoration: none; flex-shrink: 0; }
.brand-mark { font: 700 2.25rem/.9 var(--font-display); letter-spacing: -.08em; }
.brand-slash { color: var(--orange); }
.brand-name { border-left: 1px solid rgba(255,255,255,.45); padding-left: 18px; font: 400 .65rem/1.65 var(--font-mono); letter-spacing: .13em; text-transform: uppercase; }
.site-nav { display: flex; align-items: center; gap: clamp(1rem, 2.3vw, 2.4rem); }
.site-nav a { text-decoration: none; font: 500 .68rem var(--font-mono); letter-spacing: .1em; text-transform: uppercase; color: #d2e0ed; padding: 1.9rem 0 1.65rem; border-bottom: 3px solid transparent; transition: color .18s, border-color .18s; }
.site-nav a:hover, .site-nav a.active { color: var(--blue); border-color: var(--blue); }
.site-nav .nav-submit { color: white; border: 1px solid var(--orange); padding: .75rem 1rem; }
.site-nav .nav-submit:hover { background: var(--orange); color: var(--navy); }
.header-tag { color: #71c5ff; font: .6rem var(--font-mono); letter-spacing: .14em; white-space: nowrap; }
.menu-toggle { display: none; background: none; border: 1px solid var(--line-light); padding: .6rem; }
.menu-toggle span { display: block; width: 22px; height: 2px; margin: 4px; background: white; }
.blueprint-grid { background-color: var(--navy); background-image: linear-gradient(rgba(22,139,250,.075) 1px, transparent 1px), linear-gradient(90deg, rgba(22,139,250,.075) 1px, transparent 1px); background-size: 32px 32px; }
.blueprint-grid-dark { background-color: var(--navy); background-image: linear-gradient(rgba(22,139,250,.11) 1px, transparent 1px), linear-gradient(90deg, rgba(22,139,250,.11) 1px, transparent 1px); background-size: 26px 26px; color: var(--white); }
.hero { display: grid; grid-template-columns: 1fr 1fr; min-height: 650px; color: white; overflow: hidden; }
.hero-copy { padding: clamp(3rem, 7vw, 7.5rem) 7% clamp(3rem, 6vw, 6rem) max(5.2%, calc((100vw - var(--content))/2)); display: flex; flex-direction: column; align-items: flex-start; justify-content: center; border-right: 1px solid var(--line-light); }
.eyebrow, .section-index, .track-kicker, .principle-num, .archive-count, .mono-label { font: 500 .68rem var(--font-mono); letter-spacing: .13em; text-transform: uppercase; }
.eyebrow { display: flex; align-items: center; gap: .8rem; color: #b8ccdc; margin: 0 0 2rem; }
.eyebrow-line { display: inline-block; width: 36px; height: 2px; background: var(--orange); }
.eyebrow-year { color: var(--blue); }
h1, h2, h3, p { margin-top: 0; }
.hero h1 { font: 700 clamp(3.25rem, 6.1vw, 6.4rem)/.98 var(--font-display); letter-spacing: -.065em; margin: 0; max-width: 750px; }
.hero h1 span, .focus-heading h2 span, .submit-section h2 span, .archive-hero h1 span { color: var(--blue); }
.hero-lede { max-width: 580px; margin: 1.7rem 0 0; font-size: clamp(1rem, 1.45vw, 1.25rem); line-height: 1.75; color: #c4d6e5; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 2rem; }
.button { display: inline-flex; min-height: 50px; align-items: center; justify-content: center; gap: 1.5rem; padding: .9rem 1.25rem; text-decoration: none; font: 600 .72rem var(--font-mono); letter-spacing: .04em; text-transform: uppercase; border: 1px solid transparent; transition: transform .2s, background .2s, color .2s; }
.button:hover { transform: translateY(-2px); }
.button-orange { background: var(--orange); color: var(--navy); }
.button-orange:hover { background: #ff9a5f; }
.button-outline { border-color: #168bfa; color: white; }
.button-outline:hover { background: var(--blue); }
.hero-footnote { margin-top: 3rem; color: #89a5bb; font: .61rem var(--font-mono); letter-spacing: .12em; }
.status-dot { display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: var(--orange); box-shadow: 0 0 0 4px rgba(255,121,43,.13); margin-right: .55rem; }
.footnote-divider { padding: 0 .65rem; color: var(--orange); }
.hero-art { position: relative; min-height: 600px; background: radial-gradient(ellipse at 50% 50%, rgba(22,139,250,.13), transparent 55%); overflow: hidden; }
.robot-drawing { position: absolute; inset: 10% 4% 8%; width: 92%; height: 82%; }
.art-meta { position: absolute; left: 7%; right: 7%; display: flex; justify-content: space-between; gap: 1rem; color: #78bde9; font: .57rem var(--font-mono); letter-spacing: .12em; }
.art-meta span { color: #5c87a5; }
.art-meta-top { top: 6%; }
.art-meta-bottom { bottom: 4%; }
.art-side-note { position: absolute; right: 5%; top: 28%; color: var(--blue); font: .7rem/1.8 var(--font-mono); letter-spacing: .1em; }
.section-pad { padding: clamp(3.5rem, 7vw, 7rem) max(5.2%, calc((100vw - var(--content))/2)); }
.tracks-section { display: grid; grid-template-columns: .85fr 1fr 1fr; gap: 1.2rem; align-items: stretch; background: var(--paper); }
.section-index { color: var(--muted); margin-bottom: 1.7rem; }
.section-index span { color: var(--orange); }
.section-intro h2, .eligibility-copy h2 { font: 700 clamp(2.4rem, 4vw, 4rem)/1.04 var(--font-display); letter-spacing: -.055em; margin-bottom: 1rem; }
.section-intro > p:last-child { max-width: 340px; color: var(--muted); line-height: 1.8; }
.track-card { min-height: 260px; display: flex; gap: 1rem; position: relative; overflow: hidden; padding: 1.7rem; text-decoration: none; border: 1px solid #d2dde5; transition: transform .2s, box-shadow .2s; }
.track-card:hover { transform: translateY(-4px); box-shadow: 0 15px 32px rgba(7,24,39,.1); }
.software-card { background: #e2effa; border-left: 4px solid var(--blue); }
.hardware-card { background: #e0f1ed; border-left: 4px solid var(--teal); }
.track-icon { flex: 0 0 48px; height: 48px; display: grid; place-items: center; border: 1px solid currentColor; font: 600 1.1rem var(--font-mono); }
.code-icon { color: #0878db; }
.chip-icon { color: var(--teal); font-size: 1.7rem; }
.track-content { position: relative; z-index: 1; }
.track-kicker { color: var(--muted); font-size: .59rem; margin: .2rem 0 .8rem; }
.track-card h3 { font: 700 2rem var(--font-display); margin: 0 0 .65rem; }
.track-card p:not(.track-kicker) { font-size: .88rem; line-height: 1.65; color: #40586c; }
.track-link { display: inline-flex; gap: 1rem; margin-top: .5rem; font: 600 .67rem var(--font-mono); text-transform: uppercase; letter-spacing: .08em; }
.track-number { position: absolute; right: -.1rem; bottom: -2.4rem; font: 700 10rem/.9 var(--font-display); color: rgba(22,139,250,.06); }
.hardware-card .track-number { color: rgba(14,137,124,.07); }
.focus-section { padding: clamp(3.5rem, 7vw, 6rem) max(5.2%, calc((100vw - var(--content))/2)); display: grid; grid-template-columns: .85fr 1.5fr; gap: 5rem; position: relative; overflow: hidden; }
.focus-heading h2, .submit-section h2 { font: 700 clamp(2.5rem, 4.5vw, 4.5rem)/1.02 var(--font-display); letter-spacing: -.06em; margin-bottom: 1.5rem; }
.focus-heading > p:last-child, .submit-section > div:first-child > p:last-child { max-width: 470px; color: #a9bfd0; line-height: 1.8; }
.light-index { color: #9bb2c5; }
.principles { display: grid; grid-template-columns: repeat(2, 1fr); }
.principle { padding: 1.5rem 1.6rem 2rem; border-left: 1px solid rgba(22,139,250,.55); border-bottom: 1px solid var(--line-light); }
.principle:nth-child(3), .principle:nth-child(4) { border-bottom: 0; }
.principle-icon { color: var(--blue); font-size: 2rem; line-height: 1; }
.principle-num { color: #7894aa; font-size: .58rem; margin: 1.6rem 0 .8rem; }
.principle h3 { font: 600 1.3rem var(--font-display); margin-bottom: .6rem; }
.principle p:last-child { color: #a9bfd0; font-size: .88rem; line-height: 1.7; margin-bottom: 0; }
.eligibility-section { display: grid; grid-template-columns: .78fr 1fr; gap: clamp(3rem, 8vw, 8rem); }
.eligibility-stamp { background: var(--blue); color: white; padding: 2.2rem; min-height: 410px; display: flex; flex-direction: column; align-items: flex-start; justify-content: space-between; background-image: linear-gradient(rgba(255,255,255,.08) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.08) 1px, transparent 1px); background-size: 24px 24px; }
.eligibility-stamp .section-index { color: rgba(255,255,255,.8); }
.stamp-mark { font: 700 2.5rem var(--font-display); letter-spacing: -.08em; }
.stamp-mark span { color: var(--orange); }
.eligibility-stamp h2 { font: 700 clamp(2.7rem, 4.2vw, 4.3rem)/.98 var(--font-display); letter-spacing: -.06em; margin: 1rem 0; }
.eligibility-stamp > p:last-child { font: .62rem var(--font-mono); letter-spacing: .15em; margin: 0; }
.eligibility-copy h2 { margin-bottom: 1.2rem; }
.eligibility-lede { color: var(--muted); font-size: 1.05rem; line-height: 1.8; max-width: 650px; }
.steps { list-style: none; padding: 0; margin: 2.5rem 0 0; border-top: 1px solid var(--line); }
.steps li { display: grid; grid-template-columns: 42px 1fr; gap: 1rem; padding: 1.5rem 0; border-bottom: 1px solid var(--line); }
.step-num { color: var(--orange); font: .7rem var(--font-mono); padding-top: .25rem; }
.steps h3 { font: 600 1.1rem var(--font-display); margin-bottom: .4rem; }
.steps p { margin: 0; color: var(--muted); line-height: 1.7; font-size: .9rem; }
.small-note { font-size: .77rem; line-height: 1.7; color: #6b7e8e; margin-top: 1.5rem; }
.submit-section { padding: clamp(3.5rem, 7vw, 7rem) max(5.2%, calc((100vw - var(--content))/2)); display: grid; grid-template-columns: 1.3fr .7fr; align-items: end; gap: 4rem; }
.submit-section h2 { margin-bottom: 1.4rem; }
.submit-actions { display: flex; flex-direction: column; align-items: flex-start; gap: 1.2rem; padding-bottom: .5rem; }
.text-link-light { color: #b9d8ec; text-decoration: none; font: .7rem var(--font-mono); text-transform: uppercase; letter-spacing: .08em; }
.text-link-light:hover { color: var(--orange); }
.light-note { color: #7f9caf; max-width: 370px; margin: 0; }
.site-footer { background: #04111d; color: white; padding: 2.5rem max(5.2%, calc((100vw - var(--content))/2)) 1.2rem; border-top: 1px solid rgba(22,139,250,.35); }
.footer-main { display: flex; align-items: center; justify-content: space-between; padding-bottom: 2.2rem; }
.footer-brand .brand-mark { font-size: 1.9rem; }
.footer-brand .brand-name { font-size: .55rem; }
.footer-motto { color: #71c5ff; font: .68rem/1.7 var(--font-mono); letter-spacing: .15em; text-align: right; margin: 0; }
.footer-bottom { border-top: 1px solid var(--line-light); padding-top: 1.2rem; display: flex; justify-content: space-between; gap: 1rem; color: #7790a3; font: .58rem var(--font-mono); letter-spacing: .08em; }
.footer-bottom i { display: inline-block; width: 5px; height: 5px; background: var(--orange); border-radius: 50%; vertical-align: middle; margin: 0 .5rem; }
/* Journal archive */
.archive-hero { padding: clamp(4rem, 9vw, 8rem) max(5.2%, calc((100vw - var(--content))/2)); }
.archive-hero h1 { font: 700 clamp(3rem, 7vw, 6.5rem)/.98 var(--font-display); letter-spacing: -.065em; margin: 2rem 0 1.5rem; }
.archive-hero > p:not(.section-index) { color: #b8ccdc; max-width: 650px; line-height: 1.8; font-size: 1.1rem; }
.archive-status { margin-top: 3rem; color: #8da9bd; font: .65rem var(--font-mono); letter-spacing: .1em; }
.archive-content { padding-top: 3.5rem; }
.archive-topline { display: flex; align-items: center; justify-content: space-between; gap: 1rem; border-bottom: 1px solid var(--line); }
.archive-topline .section-index { margin-bottom: 1rem; }
.mono-label { color: #738696; font-size: .6rem; }
.mono-label span { color: var(--orange); padding: 0 .5rem; }
.archive-notice { margin: 2rem 0 4rem; padding: 1.3rem 1.5rem; border-left: 3px solid var(--orange); background: #e6edf2; max-width: 850px; }
.archive-notice strong { font: 600 .8rem var(--font-mono); text-transform: uppercase; }
.archive-notice p { margin: .5rem 0 0; color: var(--muted); line-height: 1.7; font-size: .9rem; }
.archive-track { margin: 0 0 4rem; scroll-margin-top: 100px; }
.archive-track-head { display: flex; align-items: center; gap: 1rem; border-bottom: 1px solid var(--ink); padding-bottom: 1.2rem; }
.track-letter { width: 52px; height: 52px; display: grid; place-items: center; font: 600 1.1rem var(--font-mono); }
.letter-h { background: #dcecf9; color: #0878db; }
.letter-f { background: #dcefe9; color: var(--teal); }
.archive-track-head .track-kicker { margin-bottom: .25rem; }
.archive-track-head h2 { margin: 0; font: 700 2.5rem var(--font-display); }
.archive-count { margin-left: auto; color: #6f8291; font-size: .6rem; }
.archive-description { max-width: 760px; margin: 1.2rem 0 1.8rem; color: var(--muted); line-height: 1.8; }
.empty-state { display: flex; align-items: flex-start; gap: 1rem; padding: 1.7rem; border: 1px dashed #aebfcb; background: rgba(255,255,255,.4); }
.empty-cross { color: var(--orange); font: 2rem var(--font-mono); }
.empty-state h3 { font: 600 1.1rem var(--font-display); margin-bottom: .5rem; }
.empty-state p { margin: 0; color: var(--muted); line-height: 1.7; font-size: .9rem; }
.archive-bottom-cta { margin-top: 5rem; border-top: 1px solid var(--line); padding-top: 2rem; display: flex; align-items: center; justify-content: space-between; gap: 2rem; }
.archive-bottom-cta .section-index { margin-bottom: .8rem; }
.archive-bottom-cta h2 { font: 700 2rem var(--font-display); margin: 0; }
@media (max-width: 1100px) {
  .header-tag { display: none; }
  .tracks-section { grid-template-columns: 1fr 1fr; }
  .section-intro { grid-column: 1 / -1; }
  .section-intro h2 br { display: none; }
  .hero-copy { padding-left: 5%; }
  .hero-art { min-height: 550px; }
  .focus-section { gap: 2.5rem; }
}
@media (max-width: 760px) {
  .header-inner { min-height: 72px; padding: 0 5%; flex-wrap: wrap; }
  .brand { gap: 10px; }
  .brand-mark { font-size: 1.9rem; }
  .brand-name { font-size: .49rem; padding-left: 10px; }
  .menu-toggle { display: block; margin-left: auto; }
  .site-nav { display: none; flex-basis: 100%; flex-direction: column; align-items: stretch; gap: 0; padding: 0 0 1rem; }
  .site-nav.is-open { display: flex; }
  .site-nav a, .site-nav .nav-submit { padding: .9rem .2rem; border: 0; border-bottom: 1px solid var(--line-light); }
  .site-nav .nav-submit { margin-top: .5rem; padding-left: .8rem; }
  .hero { grid-template-columns: 1fr; }
  .hero-copy { padding: 4rem 6% 3rem; border-right: 0; }
  .hero h1 { font-size: clamp(3.2rem, 14vw, 5.5rem); }
  .hero-lede { font-size: 1rem; }
  .hero-art { min-height: 390px; border-top: 1px solid var(--line-light); }
  .robot-drawing { inset: 8% 4%; height: 84%; }
  .art-side-note { right: 3%; font-size: .55rem; }
  .section-pad { padding: 3.5rem 6%; }
  .tracks-section { grid-template-columns: 1fr; gap: 1rem; }
  .section-intro { grid-column: auto; }
  .track-card { min-height: 220px; padding: 1.3rem; }
  .focus-section { padding: 3.5rem 6%; grid-template-columns: 1fr; gap: 2rem; }
  .principles { grid-template-columns: 1fr 1fr; }
  .principle { padding: 1.2rem; }
  .eligibility-section { grid-template-columns: 1fr; gap: 3rem; }
  .eligibility-stamp { min-height: 330px; }
  .submit-section { padding: 3.5rem 6%; grid-template-columns: 1fr; gap: 2rem; }
  .footer-main { align-items: flex-start; }
  .footer-bottom { flex-direction: column; line-height: 1.8; }
  .archive-hero { padding: 4rem 6%; }
  .archive-content { padding: 3rem 6%; }
  .archive-topline { align-items: flex-start; flex-direction: column; gap: .2rem; }
  .archive-count { font-size: .5rem; }
  .archive-bottom-cta { align-items: flex-start; flex-direction: column; }
}
@media (max-width: 420px) {
  .brand-name { display: none; }
  .hero-actions { width: 100%; }
  .button { width: 100%; justify-content: space-between; }
  .principles { grid-template-columns: 1fr; }
  .principle:nth-child(3) { border-bottom: 1px solid var(--line-light); }
  .footer-motto { font-size: .55rem; }
  .archive-track-head h2 { font-size: 2rem; }
  .archive-count { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
}


/* Submission pathways */
.pathways-section { grid-template-columns: .85fr 1fr 1fr; }
.pathway-card { min-height: 255px; }
.hackclub-card { background: #e2effa; border-left-color: var(--blue); }
.soti-card { background: #e0f1ed; border-left-color: var(--teal); }
.soti-icon { color: var(--teal); font: 700 1.2rem var(--font-display); }
.pathway-disclaimer { grid-column: 2 / -1; margin: -.2rem 0 0; color: #6b7e8e; font-size: .75rem; line-height: 1.7; }
.hero-art .robot-drawing { object-fit: contain; object-position: center; inset: 0; width: 100%; height: 100%; padding: 1.5rem; mix-blend-mode: screen; }
@media (max-width: 1100px) {
  .pathways-section { grid-template-columns: 1fr 1fr; }
  .pathways-section .section-intro { grid-column: 1 / -1; }
  .pathway-disclaimer { grid-column: 1 / -1; }
}
@media (max-width: 760px) {
  .pathways-section { grid-template-columns: 1fr; }
  .pathways-section .section-intro { grid-column: auto; }
  .pathway-disclaimer { grid-column: auto; }
}