/* Room 23 — public class website (mralbin.com). Field Kit house style. */
:root{
  --ink:#15120B; --paper:#F4F1E9; --paper-alt:#EFEADD; --card:#FBF9F3;
  --signal:#FF3B1F; --muted:#5C574A; --faint:#8A8472;
  --hairline:#DAD4C6; --hairline-2:#C9C2B0; --edge:#E4DECF; --ink-line:#33301F;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{margin:0;background:var(--paper);color:var(--ink);font-family:'Lexend',sans-serif;-webkit-font-smoothing:antialiased;}
::selection{background:var(--signal);color:var(--paper);}
a{color:inherit;text-decoration:none;}
.sig{color:var(--signal);}
.wrap{max-width:1180px;margin:0 auto;padding:0 40px;}

/* ---------- Nav ---------- */
.nav{position:sticky;top:0;z-index:40;background:var(--paper);border-bottom:2px solid var(--ink);}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:18px 40px;flex-wrap:wrap;max-width:1180px;margin:0 auto;}
.brand{font-family:'Archivo Black',sans-serif;font-size:22px;letter-spacing:-0.01em;text-transform:uppercase;}
.nav-links{display:flex;align-items:center;gap:24px;font-family:'Archivo',sans-serif;font-weight:700;font-size:13px;letter-spacing:0.12em;text-transform:uppercase;flex-wrap:wrap;}
.nav-links a{color:var(--ink);transition:color .12s;}
.nav-links a:hover{color:var(--signal);}
.nav-links a.active{color:var(--signal);}
.nav-cta{background:var(--signal);color:var(--paper)!important;padding:9px 16px;transition:background .12s;}
.nav-cta:hover{background:var(--ink);}

/* ---------- Buttons ---------- */
.btn{display:inline-block;font-family:'Archivo',sans-serif;font-weight:700;font-size:14px;letter-spacing:0.06em;
  text-transform:uppercase;padding:15px 26px;border:2px solid var(--ink);transition:background .12s,color .12s;cursor:pointer;}
.btn-primary{background:var(--signal);border-color:var(--signal);color:var(--paper);}
.btn-primary:hover{background:var(--ink);border-color:var(--ink);}
.btn-ghost{background:transparent;color:var(--ink);}
.btn-ghost:hover{background:var(--ink);color:var(--paper);}

/* ---------- Sections ---------- */
.section{padding:56px 40px;border-top:2px solid var(--ink);}
.section .wrap{padding:0;}
.section--alt{background:var(--paper-alt);}
.section--ink{background:var(--ink);color:var(--paper);}
.eyebrow{font-family:'Archivo',sans-serif;font-weight:700;font-size:13px;letter-spacing:0.2em;text-transform:uppercase;color:var(--signal);margin-bottom:10px;}
.h2{font-family:'Archivo Black',sans-serif;font-size:clamp(32px,4.4vw,52px);line-height:0.92;letter-spacing:-0.02em;margin:0;text-transform:uppercase;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;flex-wrap:wrap;gap:10px;margin-bottom:30px;}
.section-aside{font-family:'Archivo',sans-serif;font-weight:700;font-size:14px;letter-spacing:0.06em;text-transform:uppercase;color:var(--muted);}
.seeall{font-family:'Archivo',sans-serif;font-weight:700;font-size:13px;letter-spacing:0.06em;text-transform:uppercase;color:var(--signal);}
.seeall:hover{color:var(--ink);}

/* ---------- Hero ---------- */
.hero{display:flex;gap:44px;padding:64px 40px 56px;align-items:center;flex-wrap:wrap;max-width:1180px;margin:0 auto;}
.hero-main{flex:1.1;min-width:300px;}
.hero h1{font-family:'Archivo Black',sans-serif;font-size:clamp(52px,7vw,86px);line-height:0.9;letter-spacing:-0.02em;margin:0;text-transform:uppercase;}
.hero p{font-size:19px;line-height:1.6;max-width:42ch;margin:28px 0 0;}
.hero-cta{display:flex;gap:14px;margin-top:32px;flex-wrap:wrap;}
.hero-media{flex:1;min-width:300px;position:relative;}
.hero-photo{aspect-ratio:4/3;background:repeating-linear-gradient(135deg,#ECE7DA 0 13px,#E4DECF 13px 26px);border:1px solid var(--hairline-2);display:flex;align-items:center;justify-content:center;}
.hero-photo span{font-family:'JetBrains Mono',ui-monospace,Menlo,monospace;font-size:13px;letter-spacing:0.04em;color:var(--faint);background:var(--paper);padding:7px 13px;border:1px solid var(--hairline-2);}
.hero-badge{position:absolute;top:-14px;left:-14px;display:flex;box-shadow:0 4px 14px rgba(0,0,0,0.16);background:var(--ink);color:var(--paper);padding:10px 13px;flex-direction:column;align-items:center;justify-content:center;}
.hero-badge .r{font-family:'Archivo',sans-serif;font-weight:700;font-size:8px;letter-spacing:0.18em;color:var(--signal);}
.hero-badge .n{font-family:'Archivo Black',sans-serif;font-size:24px;line-height:0.9;}

/* ---------- This Week cards ---------- */
.grid{display:grid;gap:18px;}
.grid--wk{grid-template-columns:repeat(auto-fit,minmax(320px,1fr));}
.wkcard{background:var(--card);border:1px solid var(--edge);overflow:hidden;}
.wkcard-head{display:flex;align-items:stretch;}
.wkcard-unit{background:var(--signal);color:var(--paper);display:flex;flex-direction:column;align-items:center;justify-content:center;padding:0 18px;}
.wkcard-unit .u{font-family:'Archivo',sans-serif;font-weight:700;font-size:9px;letter-spacing:0.16em;}
.wkcard-unit .n{font-family:'Archivo Black',sans-serif;font-size:30px;line-height:0.9;}
.wkcard-title{background:var(--ink);color:var(--paper);flex:1;display:flex;flex-direction:column;justify-content:center;padding:14px 18px;}
.wkcard-title .sub{font-family:'Archivo',sans-serif;font-weight:700;font-size:10px;letter-spacing:0.18em;color:var(--signal);}
.wkcard-title .ttl{font-family:'Archivo',sans-serif;font-weight:800;font-size:20px;}
.wkcard-body{padding:20px 22px;}
.label{font-family:'Archivo',sans-serif;font-weight:800;font-size:11px;letter-spacing:0.14em;text-transform:uppercase;color:var(--muted);margin-bottom:10px;}
.dotlist{display:flex;flex-direction:column;gap:8px;font-size:16px;}
.dotlist > div{display:flex;gap:11px;align-items:center;}
.dot{width:7px;height:7px;background:var(--signal);border-radius:50%;flex-shrink:0;}
.due{display:flex;align-items:center;gap:12px;margin-top:18px;border-top:1px solid var(--edge);padding-top:16px;}
.chip{font-family:'Archivo',sans-serif;font-weight:700;font-size:11px;letter-spacing:0.1em;text-transform:uppercase;background:var(--signal);color:var(--paper);padding:5px 10px;}

/* ---------- Units ---------- */
.subhead{font-family:'Archivo',sans-serif;font-weight:800;font-size:12px;letter-spacing:0.16em;text-transform:uppercase;color:var(--muted);margin-bottom:14px;}
.grid--units{grid-template-columns:repeat(auto-fit,minmax(210px,1fr));margin-bottom:30px;}
.unit{display:flex;align-items:stretch;border:1px solid var(--edge);overflow:hidden;background:var(--card);transition:border-color .12s;}
.unit:hover{border-color:var(--ink);}
.unit-n{background:var(--ink);color:var(--paper);display:flex;align-items:center;justify-content:center;padding:0 15px;font-family:'Archivo Black',sans-serif;font-size:22px;}
.unit-n.now{background:var(--signal);}
.unit-b{padding:11px 14px;}
.unit-b .t{font-family:'Archivo',sans-serif;font-weight:800;font-size:15px;}
.unit-b .s{font-size:12px;color:var(--muted);}

/* ---------- Homework ---------- */
.hwrow{display:flex;gap:18px;align-items:center;padding:16px 0;border-bottom:1px solid var(--ink-line);flex-wrap:wrap;}
.hwrow:last-child{border-bottom:none;}
.hw-date{width:118px;font-family:'Archivo',sans-serif;font-weight:800;font-size:13px;letter-spacing:0.06em;text-transform:uppercase;color:var(--signal);}
.hw-tag{font-family:'Archivo',sans-serif;font-weight:700;font-size:10px;letter-spacing:0.14em;text-transform:uppercase;border:1px solid var(--muted);color:#C9C4B4;padding:4px 9px;}
.hw-task{flex:1;min-width:200px;font-size:16px;}
.section--ink .hw-tag{color:#C9C4B4;}

/* ---------- Resources ---------- */
.grid--res{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;}
.rescard{background:var(--card);border:1px solid var(--edge);padding:22px;transition:border-color .12s;display:block;}
.rescard:hover{border-color:var(--ink);}
.rescard .kind{display:flex;align-items:center;gap:9px;margin-bottom:12px;font-family:'Archivo',sans-serif;font-weight:800;font-size:11px;letter-spacing:0.12em;text-transform:uppercase;color:var(--muted);}
.rescard .kind .dot{width:9px;height:9px;}
.rescard .rt{font-family:'Archivo',sans-serif;font-weight:800;font-size:18px;margin-bottom:8px;}
.rescard .go{font-family:'Archivo',sans-serif;font-weight:700;font-size:13px;letter-spacing:0.06em;text-transform:uppercase;color:var(--signal);}

/* ---------- Contact ---------- */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:28px;margin-top:26px;}
.contact-card{background:var(--card);border:1px solid var(--edge);padding:26px;}
.contact-card .label{margin-bottom:12px;}
.contact-card .big{font-family:'Archivo',sans-serif;font-weight:800;font-size:20px;}
.contact-card a.big:hover{color:var(--signal);}
.contact-card p{font-size:16px;line-height:1.6;color:var(--muted);margin:6px 0 0;}

/* ---------- Footer ---------- */
.foot{padding:52px 40px 40px;border-top:2px solid var(--ink);background:var(--paper-alt);}
.foot-top{display:flex;gap:40px;justify-content:space-between;flex-wrap:wrap;max-width:1180px;margin:0 auto;}
.foot-brand{font-family:'Archivo Black',sans-serif;font-size:34px;letter-spacing:-0.01em;text-transform:uppercase;}
.foot-blurb{font-size:15px;line-height:1.55;color:var(--muted);margin:12px 0 0;max-width:34ch;}
.foot-cols{display:flex;gap:48px;flex-wrap:wrap;}
.foot-col .label{margin-bottom:14px;}
.foot-col .links{font-size:15px;line-height:2;}
.foot-col .links a:hover{color:var(--signal);}
.foot-bar{display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--hairline);margin:36px auto 0;padding-top:18px;flex-wrap:wrap;gap:10px;max-width:1180px;
  font-family:'Archivo',sans-serif;font-weight:700;font-size:12px;letter-spacing:0.06em;text-transform:uppercase;color:var(--muted);}
.foot-bar a:hover{color:var(--signal);}

/* ---------- FAQ ---------- */
.faq-list{max-width:820px;}
.faq-item{border:1px solid var(--edge);background:var(--card);margin-bottom:12px;}
.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px;font-family:'Archivo',sans-serif;font-weight:800;font-size:18px;}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-q{flex:1;}
.faq-mark{width:16px;height:16px;flex-shrink:0;position:relative;}
.faq-mark::before,.faq-mark::after{content:"";position:absolute;background:var(--signal);transition:transform .15s;}
.faq-mark::before{top:7px;left:0;width:16px;height:2px;}
.faq-mark::after{left:7px;top:0;width:2px;height:16px;}
.faq-item[open] .faq-mark::after{transform:scaleY(0);}
.faq-a{padding:0 22px 22px;font-size:16px;line-height:1.6;color:var(--muted);max-width:64ch;}

/* ---------- Unit detail ---------- */
.u-tab{display:inline-flex;align-items:center;gap:12px;margin-bottom:18px;}
.u-tab-n{font-family:'Archivo',sans-serif;font-weight:800;font-size:13px;letter-spacing:0.16em;text-transform:uppercase;
  background:var(--signal);color:var(--paper);padding:6px 12px;}
.u-tab-s{font-family:'Archivo',sans-serif;font-weight:700;font-size:13px;letter-spacing:0.12em;text-transform:uppercase;color:var(--muted);}
.vocab-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px;}
.vocab{background:var(--card);border:1px solid var(--edge);border-left:3px solid var(--signal);padding:16px 18px;}
.vocab .term{font-family:'Archivo',sans-serif;font-weight:800;font-size:18px;margin-bottom:6px;}
.vocab .def{font-size:15px;line-height:1.5;color:var(--muted);}

/* ---------- Self-check quiz ---------- */
.quiz{max-width:760px;display:flex;flex-direction:column;gap:18px;}
.q{background:var(--card);border:1px solid var(--edge);padding:22px 24px;}
.q-tag{font-family:'Archivo',sans-serif;font-weight:800;font-size:11px;letter-spacing:0.14em;text-transform:uppercase;color:var(--muted);margin-bottom:10px;}
.q-text{font-family:'Archivo',sans-serif;font-weight:800;font-size:22px;margin-bottom:16px;}
.choices{display:flex;flex-direction:column;gap:10px;}
.choice{text-align:left;font-family:'Lexend',sans-serif;font-size:16px;background:var(--paper);border:2px solid var(--hairline);
  padding:12px 16px;cursor:pointer;transition:border-color .12s,background .12s;color:var(--ink);}
.choice:hover:not(:disabled){border-color:var(--ink);}
.choice:disabled{cursor:default;}
.choice.is-correct{border-color:#00936B;background:#E7F2EC;}
.choice.is-wrong{border-color:var(--signal);background:#FBE7E1;}
.q-feedback{margin-top:14px;font-size:15px;line-height:1.5;padding:12px 14px;border-left:3px solid var(--hairline-2);}
.q-feedback.ok{border-left-color:#00936B;}
.q-feedback.no{border-left-color:var(--signal);}
.quiz-result{display:flex;align-items:center;gap:18px;flex-wrap:wrap;background:var(--ink);color:var(--paper);padding:22px 24px;}
.quiz-score{font-family:'Archivo Black',sans-serif;font-size:40px;color:var(--signal);line-height:1;}
.quiz-msg{flex:1;min-width:180px;font-size:16px;}

/* ---------- Flashcards ---------- */
.fc-filters{display:flex;gap:10px;margin-bottom:22px;}
.fc-filter{font-family:'Archivo',sans-serif;font-weight:700;font-size:12px;letter-spacing:0.1em;text-transform:uppercase;
  background:transparent;border:2px solid var(--hairline);padding:8px 16px;cursor:pointer;color:var(--ink);transition:all .12s;}
.fc-filter:hover{border-color:var(--ink);}
.fc-filter.is-on{background:var(--signal);border-color:var(--signal);color:var(--paper);}
.fc-stage{perspective:1600px;max-width:640px;}
.fc-card{position:relative;width:100%;aspect-ratio:16/10;cursor:pointer;transform-style:preserve-3d;transition:transform .4s;}
.fc-card.flipped{transform:rotateY(180deg);}
.fc-face{position:absolute;inset:0;backface-visibility:hidden;display:flex;flex-direction:column;align-items:center;
  justify-content:center;padding:40px;text-align:center;border:1px solid var(--hairline-2);}
.fc-front{background:var(--card);}
.fc-back{background:var(--ink);color:var(--paper);transform:rotateY(180deg);}
.fc-deck{font-family:'Archivo',sans-serif;font-weight:700;font-size:12px;letter-spacing:0.16em;text-transform:uppercase;color:var(--signal);position:absolute;top:20px;left:24px;}
.fc-term{font-family:'Archivo Black',sans-serif;font-size:clamp(34px,5vw,56px);letter-spacing:-0.01em;text-transform:uppercase;line-height:0.95;}
.fc-hint{position:absolute;bottom:20px;font-family:'JetBrains Mono',monospace;font-size:12px;color:var(--faint);}
.fc-def{font-size:clamp(20px,3vw,28px);line-height:1.4;max-width:30ch;}
.fc-controls{display:flex;align-items:center;gap:14px;margin-top:22px;max-width:640px;flex-wrap:wrap;}
.fc-count{font-family:'Archivo',sans-serif;font-weight:700;font-size:14px;letter-spacing:0.06em;color:var(--muted);min-width:64px;text-align:center;}
.fc-controls .btn{padding:11px 18px;}
.rescard--study{border-left:3px solid var(--signal);}

/* ---------- Class launcher cards (home) ---------- */
.grid--classes{grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px;margin-bottom:30px;}
.classcard{display:block;background:var(--card);border:1px solid var(--edge);border-left:3px solid var(--signal);
  padding:24px 26px;transition:border-color .12s,transform .12s,box-shadow .12s;}
.classcard:hover{border-color:var(--ink);transform:translateY(-3px);box-shadow:0 10px 26px rgba(0,0,0,.10);}
.cc-subject{font-family:'Archivo',sans-serif;font-weight:800;font-size:11px;letter-spacing:0.16em;text-transform:uppercase;color:var(--signal);margin-bottom:10px;}
.cc-name{font-family:'Archivo Black',sans-serif;font-size:30px;letter-spacing:-0.01em;text-transform:uppercase;line-height:0.95;margin-bottom:10px;}
.cc-blurb{font-size:15px;line-height:1.5;color:var(--muted);margin-bottom:16px;}
.cc-week{font-size:14px;color:var(--ink);border-top:1px solid var(--edge);padding-top:12px;margin-bottom:14px;}
.cc-week-label{font-family:'Archivo',sans-serif;font-weight:800;font-size:10px;letter-spacing:0.12em;text-transform:uppercase;color:var(--faint);display:block;margin-bottom:3px;}
.cc-go{font-family:'Archivo',sans-serif;font-weight:700;font-size:13px;letter-spacing:0.06em;text-transform:uppercase;color:var(--signal);}

/* ---------- Read page (the "no homework" statement) ---------- */
.readpage{background:var(--ink);color:var(--paper);min-height:78vh;display:flex;align-items:center;
  justify-content:center;text-align:center;padding:80px 40px;}
.readpage-inner{max-width:900px;}
.read-word{font-family:'Archivo Black',sans-serif;font-size:clamp(96px,24vw,280px);line-height:0.82;
  letter-spacing:-0.03em;text-transform:uppercase;margin:16px 0 0;}
.read-sub{font-size:clamp(18px,2.4vw,26px);line-height:1.5;color:#C9C4B4;max-width:32ch;margin:30px auto 0;}

/* Read call-to-action strip at the bottom of each class page */
.readstrip{display:flex;align-items:baseline;gap:24px;flex-wrap:wrap;color:var(--paper);}
.readstrip-word{font-family:'Archivo Black',sans-serif;font-size:clamp(48px,8vw,96px);line-height:0.85;
  letter-spacing:-0.02em;text-transform:uppercase;}
.readstrip-note{font-size:18px;color:#C9C4B4;}
.readstrip-go{font-family:'Archivo',sans-serif;font-weight:700;font-size:13px;letter-spacing:0.06em;
  text-transform:uppercase;color:var(--signal);white-space:nowrap;}
.readstrip:hover .readstrip-go{color:var(--paper);}

/* ---------- Page hero (interior pages) ---------- */
.pagehero{padding:48px 40px;border-bottom:2px solid var(--ink);}
.pagehero .wrap{padding:0;}
.pagehero h1{font-family:'Archivo Black',sans-serif;font-size:clamp(40px,6vw,72px);line-height:0.9;letter-spacing:-0.02em;margin:0;text-transform:uppercase;}
.pagehero p{font-size:18px;line-height:1.55;max-width:48ch;margin:18px 0 0;color:var(--muted);}