/* ============================================================
   OUR ABC ACADEMY — Shared Stylesheet
   Design: Modern Institutional / Editorial
   Type: Newsreader · Inter Tight · JetBrains Mono
   Palettes: forest (default) · ink · oxblood
   ============================================================ */

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--sans);background:var(--paper);color:var(--ink);line-height:1.55;overflow-x:hidden;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-feature-settings:"ss01","cv11"}
img,svg{max-width:100%;display:block}
a{color:inherit;text-decoration:none;cursor:pointer}
button{font:inherit;cursor:pointer;border:none;background:none;color:inherit}
ul,ol{list-style:none}
::selection{background:var(--ink);color:var(--paper)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:2px}

/* Palettes */
:root,html[data-palette="forest"]{
  --ink:#0F2018;--ink-2:#1C3326;--ink-3:#3A5246;--ink-mute:#6B7C72;--ink-soft:#9AA59E;
  --paper:#F0ECDF;--paper-2:#E5DFCD;--paper-3:#D8D1BC;
  --rule:rgba(15,32,24,.10);--rule-strong:rgba(15,32,24,.22);
  --accent:#A8741A;--accent-2:#C68F2E;--accent-soft:rgba(168,116,26,.10);
  --on-ink:#F0ECDF;--on-ink-soft:rgba(240,236,223,.62);--on-ink-mute:rgba(240,236,223,.38);--on-ink-rule:rgba(240,236,223,.12);
}
html[data-palette="ink"]{
  --ink:#0E1219;--ink-2:#1C2230;--ink-3:#3A4150;--ink-mute:#6B7280;--ink-soft:#9AA0AD;
  --paper:#F2EEE5;--paper-2:#E8E2D4;--paper-3:#DDD5C2;
  --rule:rgba(14,18,25,.10);--rule-strong:rgba(14,18,25,.22);
  --accent:#8B6914;--accent-2:#B08A2E;--accent-soft:rgba(139,105,20,.10);
  --on-ink:#F2EEE5;--on-ink-soft:rgba(242,238,229,.62);--on-ink-mute:rgba(242,238,229,.38);--on-ink-rule:rgba(242,238,229,.12);
}
html[data-palette="oxblood"]{
  --ink:#2A1418;--ink-2:#3A1F25;--ink-3:#5A3A40;--ink-mute:#7E6266;--ink-soft:#A89498;
  --paper:#EFE9DC;--paper-2:#E2DAC8;--paper-3:#D3C9B2;
  --rule:rgba(42,20,24,.10);--rule-strong:rgba(42,20,24,.22);
  --accent:#9C7A3A;--accent-2:#B89856;--accent-soft:rgba(156,122,58,.10);
  --on-ink:#EFE9DC;--on-ink-soft:rgba(239,233,220,.64);--on-ink-mute:rgba(239,233,220,.38);--on-ink-rule:rgba(239,233,220,.12);
}

/* Tokens */
:root{
  --serif:'Newsreader','Source Serif 4',Georgia,serif;
  --sans:'Inter Tight','Inter',system-ui,-apple-system,sans-serif;
  --mono:'JetBrains Mono',ui-monospace,SFMono-Regular,monospace;
  --w:1320px;--w-tight:1080px;--gutter:clamp(20px,4.5vw,56px);
  --nav-h:72px;--bar-h:36px;
  --ease:cubic-bezier(0.22,1,0.36,1);--ease-2:cubic-bezier(0.4,0,0.2,1);
  --t-fast:180ms var(--ease-2);--t:320ms var(--ease);--t-slow:600ms var(--ease);
}

.container{width:100%;max-width:var(--w);margin:0 auto;padding:0 var(--gutter)}
.container--tight{max-width:var(--w-tight)}

/* Typography scale */
.eyebrow{font-family:var(--mono);font-size:11px;font-weight:500;letter-spacing:.22em;text-transform:uppercase;color:var(--ink-mute)}
.eyebrow .num{color:var(--accent);font-weight:600;margin-right:8px}
.eyebrow.on-ink{color:var(--on-ink-mute)}
.eyebrow.on-ink .num{color:var(--accent-2)}
.display{font-family:var(--serif);font-weight:400;letter-spacing:-.022em;line-height:.98;color:var(--ink)}
.display em{font-style:italic;font-weight:400}
.display em.gold{color:var(--accent)}
.display.xxl{font-size:clamp(56px,9.2vw,132px)}
.display.xl{font-size:clamp(44px,6.2vw,88px)}
.display.lg{font-size:clamp(36px,4.6vw,64px);line-height:1.02}
.display.md{font-size:clamp(28px,3.4vw,44px);line-height:1.08}
.display.sm{font-size:clamp(22px,2.4vw,28px);line-height:1.15;letter-spacing:-.012em}
.lede{font-family:var(--serif);font-weight:400;font-size:clamp(18px,1.6vw,22px);line-height:1.55;color:var(--ink-2);max-width:56ch}
.lede.on-ink{color:var(--on-ink)}
.prose{font-size:15.5px;line-height:1.7;color:var(--ink-3)}
.prose.on-ink{color:var(--on-ink-soft)}
.rule{height:1px;background:var(--rule);border:0;margin:0}
.rule--strong{background:var(--rule-strong)}
.rule.on-ink{background:var(--on-ink-rule)}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:12px;font-family:var(--sans);font-weight:500;font-size:14.5px;letter-spacing:-.005em;padding:14px 22px;border-radius:2px;transition:var(--t-fast);white-space:nowrap;line-height:1}
.btn .arr{width:14px;height:10px;transition:transform var(--t-fast);flex-shrink:0}
.btn:hover .arr{transform:translateX(4px)}
.btn--primary{background:var(--ink);color:var(--on-ink)}
.btn--primary:hover{background:var(--ink-2)}
.btn--ghost{background:transparent;color:var(--ink);border:1px solid var(--rule-strong)}
.btn--ghost:hover{border-color:var(--ink);background:var(--accent-soft)}
.btn--ghost.on-ink{color:var(--on-ink);border-color:var(--on-ink-rule)}
.btn--ghost.on-ink:hover{border-color:var(--on-ink);background:rgba(255,255,255,.04)}
.btn--gold{background:var(--accent);color:var(--paper)}
.btn--gold:hover{background:var(--accent-2)}
.btn--link{padding:0;background:none;color:var(--ink);border-bottom:1px solid var(--ink);border-radius:0;padding-bottom:2px}
.btn--link.on-ink{color:var(--on-ink);border-color:var(--on-ink)}

/* Inline arrow link */
.ilink{display:inline-flex;align-items:center;gap:10px;font-family:var(--mono);font-size:11.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--ink);padding-bottom:4px;border-bottom:1px solid var(--rule-strong);transition:var(--t-fast)}
.ilink:hover{border-color:var(--accent);color:var(--accent)}
.ilink.on-ink{color:var(--on-ink);border-color:var(--on-ink-rule)}
.ilink.on-ink:hover{color:var(--accent-2);border-color:var(--accent-2)}

/* Tag/pill */
.tag{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:10.5px;font-weight:500;letter-spacing:.16em;text-transform:uppercase;padding:5px 10px;color:var(--ink);background:var(--paper-2);border:1px solid var(--rule)}
.tag .dot{width:6px;height:6px;border-radius:50%;background:var(--accent)}
.tag.on-ink{color:var(--on-ink-soft);background:rgba(255,255,255,.04);border-color:var(--on-ink-rule)}

/* Utility bar */
.utility{background:var(--ink);color:var(--on-ink);height:var(--bar-h);display:flex;align-items:center;font-family:var(--mono);font-size:11px;letter-spacing:.06em;overflow:hidden;position:sticky;top:0;z-index:90}
.utility-inner{display:flex;align-items:center;gap:32px;padding:0 var(--gutter);width:100%;max-width:var(--w);margin:0 auto;justify-content:space-between}
.utility-left{display:flex;align-items:center;gap:24px;flex:1;min-width:0}
.utility-marker{display:inline-flex;align-items:center;gap:8px;color:var(--accent-2);white-space:nowrap}
.utility-marker::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--accent-2);animation:dot-pulse 2.4s ease-in-out infinite}
@keyframes dot-pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.45;transform:scale(.8)}}
.utility-ticker{color:var(--on-ink-soft);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex:1}
.utility-ticker span+span::before{content:"·";margin:0 14px;color:var(--accent-2);opacity:.6}
.utility-right{display:flex;align-items:center;gap:22px;color:var(--on-ink-mute);white-space:nowrap}
.utility-right a{transition:color var(--t-fast)}
.utility-right a:hover{color:var(--on-ink)}

/* Nav */
.nav-wrap{position:sticky;top:var(--bar-h);z-index:80}
.nav{background:var(--paper);border-bottom:1px solid var(--rule);transition:var(--t-fast)}
.nav.scrolled{background:color-mix(in srgb,var(--paper) 88%,transparent);backdrop-filter:saturate(180%) blur(16px);-webkit-backdrop-filter:saturate(180%) blur(16px);box-shadow:0 1px 0 var(--rule-strong)}
.nav-inner{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:36px;height:var(--nav-h);padding:0 var(--gutter);max-width:var(--w);margin:0 auto}
.brand{display:flex;align-items:center;gap:14px}
.brand:hover .brand-mark{border-color:var(--accent)}
.brand:hover .brand-mark::after{border-color:var(--accent)}
.brand:hover .brand-mark span{color:var(--accent)}
.brand-mark{width:38px;height:38px;border:1px solid var(--ink);display:grid;place-items:center;position:relative;flex-shrink:0;transition:border-color var(--t-fast)}
.brand-mark::after{content:"";position:absolute;inset:3px;border:1px solid var(--ink);transition:border-color var(--t-fast)}
.brand-mark span{font-family:var(--serif);font-style:italic;font-weight:500;font-size:18px;color:var(--ink);position:relative;z-index:1;line-height:1;transition:color var(--t-fast)}
.brand-text{display:flex;flex-direction:column;line-height:1.05}
.brand-name{font-family:var(--serif);font-weight:500;font-size:21px;color:var(--ink);letter-spacing:-.01em;line-height:1}
.brand-sub{font-family:var(--mono);font-size:9.5px;font-weight:500;letter-spacing:.2em;color:var(--ink-mute);text-transform:uppercase;margin-top:5px}
.nav-links{display:flex;align-items:center;gap:2px;justify-content:center}
.nav-links>li{position:relative}
.nav-link{display:inline-flex;align-items:center;gap:6px;padding:10px 14px;font-size:14px;font-weight:500;color:var(--ink-2);transition:var(--t-fast);cursor:pointer}
.nav-link:hover,.nav-link[aria-expanded="true"],.nav-link[aria-current="page"]{color:var(--ink)}
.nav-link[aria-current="page"]{position:relative}
.nav-link[aria-current="page"]::after{content:"";position:absolute;left:14px;right:14px;bottom:-1px;height:1px;background:var(--accent)}
.nav-caret{width:9px;height:9px;transition:transform var(--t-fast);opacity:.5}
.nav-link[aria-expanded="true"] .nav-caret{transform:rotate(180deg)}
.mega{position:absolute;top:calc(100% + 1px);left:50%;transform:translateX(-50%) translateY(6px);background:var(--paper);border:1px solid var(--rule-strong);padding:28px;display:grid;gap:28px;min-width:460px;opacity:0;visibility:hidden;pointer-events:none;transition:opacity var(--t-fast),visibility var(--t-fast),transform var(--t-fast);box-shadow:0 24px 60px rgba(14,18,25,.08)}
.mega.cols-1{grid-template-columns:1fr;min-width:340px}
.mega.cols-2{grid-template-columns:1fr 1fr}
.mega.cols-3{grid-template-columns:1fr 1fr 1fr;min-width:680px}
.has-mega:hover .mega,.has-mega:focus-within .mega{opacity:1;visibility:visible;pointer-events:auto;transform:translateX(-50%) translateY(0)}
.mega-col h4{font-family:var(--mono);font-size:10px;font-weight:500;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-mute);padding-bottom:12px;margin-bottom:12px;border-bottom:1px solid var(--rule)}
.mega-col a{display:block;padding:9px 0;transition:var(--t-fast)}
.mega-col a:hover{padding-left:8px}
.mega-col a .mega-t{display:block;font-size:14px;font-weight:500;color:var(--ink)}
.mega-col a .mega-s{display:block;font-size:12px;color:var(--ink-mute);margin-top:2px;line-height:1.4}
.mega-col a:hover .mega-t{color:var(--accent)}
.nav-actions{display:flex;align-items:center;gap:14px;justify-self:end}
.nav-erp{font-size:13px;color:var(--ink-mute);display:flex;align-items:center;gap:6px;transition:color var(--t-fast)}
.nav-erp::before{content:"";width:6px;height:6px;border-radius:50%;background:#2EBB6F;animation:dot-pulse 2s ease-in-out infinite;flex-shrink:0}
.nav-erp:hover{color:var(--ink)}
.hamburger{display:none;flex-direction:column;gap:4px;padding:10px}
.hamburger span{width:20px;height:1.5px;background:var(--ink);transition:var(--t-fast)}
.hamburger[aria-expanded="true"] span:nth-child(1){transform:translateY(5.5px) rotate(45deg)}
.hamburger[aria-expanded="true"] span:nth-child(2){opacity:0}
.hamburger[aria-expanded="true"] span:nth-child(3){transform:translateY(-5.5px) rotate(-45deg)}
.mobile-nav{position:fixed;inset:var(--bar-h) 0 0 0;background:var(--paper);z-index:70;padding:calc(var(--nav-h) + 24px) var(--gutter) 32px;overflow-y:auto;transform:translateX(100%);transition:transform var(--t);display:flex;flex-direction:column;gap:4px}
.mobile-nav.open{transform:translateX(0)}
.m-sect{border-bottom:1px solid var(--rule);padding:4px 0}
.m-sect-tog{width:100%;display:flex;align-items:center;justify-content:space-between;padding:16px 0;font-size:17px;font-weight:500;color:var(--ink);text-align:left}
.m-sect-body{max-height:0;overflow:hidden;transition:max-height var(--t)}
.m-sect.open .m-sect-body{max-height:800px}
.m-sect.open .m-sect-tog .nav-caret{transform:rotate(180deg)}
.m-sect-body a{display:block;padding:10px 0 10px 16px;font-size:14.5px;color:var(--ink-mute);border-left:1px solid var(--rule)}
.m-sect-body a:hover{color:var(--accent);border-color:var(--accent)}

/* Image slot placeholder */
.slot{position:relative;background:var(--paper-3);overflow:hidden}
.slot::before{content:"";position:absolute;inset:0;background-image:repeating-linear-gradient(135deg,transparent 0 22px,color-mix(in srgb,var(--ink) 6%,transparent) 22px 23px)}
.slot::after{content:attr(data-label);position:absolute;bottom:14px;left:14px;right:14px;font-family:var(--mono);font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-2);opacity:.55}
.slot .slot-cross{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:28px;height:28px;opacity:.25;pointer-events:none}
.slot .slot-cross::before,.slot .slot-cross::after{content:"";position:absolute;inset:0;background:var(--ink)}
.slot .slot-cross::before{width:1px;left:50%;transform:translateX(-50%)}
.slot .slot-cross::after{height:1px;top:50%;transform:translateY(-50%)}
.slot.tone-gold{background:var(--accent-soft)}

/* Reveal */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.visible{opacity:1;transform:translateY(0)}
.reveal-stagger>*{opacity:0;transform:translateY(16px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal-stagger.visible>*:nth-child(1){opacity:1;transform:translateY(0);transition-delay:.04s}
.reveal-stagger.visible>*:nth-child(2){opacity:1;transform:translateY(0);transition-delay:.12s}
.reveal-stagger.visible>*:nth-child(3){opacity:1;transform:translateY(0);transition-delay:.20s}
.reveal-stagger.visible>*:nth-child(4){opacity:1;transform:translateY(0);transition-delay:.28s}
.reveal-stagger.visible>*:nth-child(5){opacity:1;transform:translateY(0);transition-delay:.36s}
.reveal-stagger.visible>*:nth-child(6){opacity:1;transform:translateY(0);transition-delay:.44s}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}.reveal,.reveal-stagger>*{opacity:1;transform:none}}

/* Footer */
.footer{background:var(--ink);color:var(--on-ink);padding:clamp(72px,8vw,120px) 0 0;position:relative;overflow:hidden}
.footer::before{content:"";position:absolute;bottom:-40%;left:-10%;width:800px;height:800px;border-radius:50%;background:radial-gradient(circle,rgba(168,116,26,.05),transparent 60%);pointer-events:none}
.footer-top{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr 1fr;gap:clamp(28px,4vw,56px);padding-bottom:clamp(48px,6vw,80px);position:relative;z-index:1}
.footer-brand .brand-name,.footer-brand .brand-mark span{color:var(--on-ink)}
.footer-brand .brand-mark,.footer-brand .brand-mark::after{border-color:var(--on-ink-rule)}
.footer-brand .brand-sub{color:var(--on-ink-mute)}
.footer-motto{margin-top:28px;max-width:320px;font-family:var(--serif);font-style:italic;font-size:19px;line-height:1.45;color:var(--on-ink)}
.footer-motto-en{display:block;font-family:var(--sans);font-style:normal;font-size:12.5px;color:var(--on-ink-soft);margin-top:10px;letter-spacing:-.005em}
.footer-affil{margin-top:32px;font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--on-ink-mute);line-height:1.7}
.footer-affil strong{color:var(--accent-2);font-weight:500}
.footer-col h4{font-family:var(--mono);font-size:10px;font-weight:500;letter-spacing:.22em;text-transform:uppercase;color:var(--on-ink-mute);margin-bottom:18px}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{font-size:13.5px;color:var(--on-ink-soft);transition:var(--t-fast)}
.footer-col ul li a:hover{color:var(--accent-2)}
.footer-rule{height:1px;background:var(--on-ink-rule);margin:0 var(--gutter);max-width:var(--w);margin-left:auto;margin-right:auto;position:relative;z-index:1}
.footer-bottom{padding:28px 0;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px;font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--on-ink-mute);position:relative;z-index:1}
.footer-bottom span:last-child{display:flex;gap:20px}
.footer-bottom a{transition:color var(--t-fast)}
.footer-bottom a:hover{color:var(--accent-2)}

/* Palette switcher */
.palette-switcher{position:fixed;bottom:24px;right:24px;z-index:200;display:flex;flex-direction:column;align-items:flex-end;gap:8px}
.palette-swatches{display:flex;gap:6px;background:var(--paper);border:1px solid var(--rule-strong);padding:8px;box-shadow:0 8px 32px rgba(14,18,25,.12)}
.palette-sw{width:20px;height:20px;border-radius:50%;cursor:pointer;border:2px solid transparent;transition:var(--t-fast)}
.palette-sw.active,.palette-sw:hover{transform:scale(1.2)}
.palette-sw[data-p="forest"]{background:linear-gradient(135deg,#0F2018 50%,#A8741A 50%)}
.palette-sw[data-p="ink"]{background:linear-gradient(135deg,#0E1219 50%,#8B6914 50%)}
.palette-sw[data-p="oxblood"]{background:linear-gradient(135deg,#2A1418 50%,#9C7A3A 50%)}
.palette-sw.active{border-color:var(--ink)}
.palette-label{font-family:var(--mono);font-size:9px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-mute)}

/* Tweaks panel */
.tweaks-panel{position:fixed;top:0;right:0;bottom:0;width:280px;background:var(--paper);border-left:1px solid var(--rule-strong);z-index:300;transform:translateX(100%);transition:transform var(--t);overflow-y:auto;padding:24px}
.tweaks-panel.open{transform:translateX(0)}
.tweaks-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px;padding-bottom:16px;border-bottom:1px solid var(--rule)}
.tweaks-head h3{font-family:var(--mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-mute)}
.tweaks-close{width:28px;height:28px;display:grid;place-items:center;color:var(--ink-mute)}
.tweaks-body{display:flex;flex-direction:column;gap:24px}
.tweak-group label{display:block;font-family:var(--mono);font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-mute);margin-bottom:12px}
.tweak-swatches{display:flex;gap:8px}
.swatch{display:flex;gap:2px;padding:4px;border:1px solid var(--rule);cursor:pointer;transition:var(--t-fast)}
.swatch.active{border-color:var(--accent)}
.swatch-a,.swatch-b,.swatch-c{width:16px;height:16px}
.swatch-name{font-family:var(--mono);font-size:9px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-mute);text-align:center;margin-top:4px}
.tweak-radio{display:flex;gap:4px}
.tweak-radio button{font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;padding:7px 12px;border:1px solid var(--rule);color:var(--ink-mute);transition:var(--t-fast)}
.tweak-radio button.active{background:var(--ink);color:var(--on-ink);border-color:var(--ink)}

/* Responsive */
@media(max-width:1100px){
  .nav-links,.nav-actions .btn--primary,.nav-actions .btn--ghost{display:none}
  .hamburger{display:flex}
  .footer-top{grid-template-columns:1fr 1fr 1fr;gap:2rem}
}
@media(max-width:640px){
  .footer-top{grid-template-columns:1fr}
  .palette-switcher{bottom:16px;right:16px}
}