/* Lamar University Quiz Preps — ALTA's calm paper look, in muted Lamar red and gold. */
:root{
  --paper:#f6f2ec; --card:#fdfbf8; --sunk:#efe9e0;
  --ink:#26211f; --ink-soft:#5a504a; --muted:#857a72;
  --red:#8c2331; --red-deep:#6f1a26; --red-tint:#f3e3e3;
  --gold:#a77d2c; --gold-tint:#f4ead3;
  --line:#e2d9cd; --line-strong:#cfc3b4;
  --good:#2f7a4f; --good-tint:#e3f0e6; --bad:#a93a32; --bad-tint:#f6e1de;
  --shadow:0 1px 2px rgba(38,33,31,.06),0 4px 14px rgba(38,33,31,.05);
  --serif:'Source Serif 4',Georgia,serif;
  --sans:'Atkinson Hyperlegible',system-ui,-apple-system,sans-serif;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --paper:#2b2725; --card:#34302d; --sunk:#3d3835;
    --ink:#ece6df; --ink-soft:#c9c0b6; --muted:#a0958b;
    --red:#de9199; --red-deep:#eaadb3; --red-tint:#4a3135;
    --gold:#d6b26a; --gold-tint:#433a29;
    --line:#46403c; --line-strong:#58504b;
    --good:#86c9a2; --good-tint:#2d4236; --bad:#e8988d; --bad-tint:#4c312d;
    --shadow:0 1px 2px rgba(0,0,0,.18),0 4px 14px rgba(0,0,0,.12);
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --paper:#2b2725; --card:#34302d; --sunk:#3d3835;
  --ink:#ece6df; --ink-soft:#c9c0b6; --muted:#a0958b;
  --red:#de9199; --red-deep:#eaadb3; --red-tint:#4a3135;
  --gold:#d6b26a; --gold-tint:#433a29;
  --line:#46403c; --line-strong:#58504b;
  --good:#86c9a2; --good-tint:#2d4236; --bad:#e8988d; --bad-tint:#4c312d;
  --shadow:0 1px 2px rgba(0,0,0,.18),0 4px 14px rgba(0,0,0,.12);
  color-scheme:dark;
}

*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{
  font-family:var(--sans);background:var(--paper);color:var(--ink);
  line-height:1.6;font-size:17px;-webkit-font-smoothing:antialiased;min-height:100vh;
  padding-bottom:env(safe-area-inset-bottom);
}
.wrap{max-width:860px;margin:0 auto;padding:0 18px}
a{color:var(--red)}
button{font:inherit;color:inherit}
.muted{color:var(--muted)}
[hidden]{display:none!important}
main.wrap{padding:28px 18px 90px;outline:none}

/* Masthead */
.masthead{border-bottom:1px solid var(--line);background:var(--paper);padding-top:env(safe-area-inset-top)}
.masthead .bar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:16px;padding-bottom:14px}
.brand{text-decoration:none;color:var(--ink);display:flex;flex-direction:column;line-height:1.05}
.kicker{font-size:.68rem;letter-spacing:.28em;text-transform:uppercase;color:var(--red);font-weight:700}
.brand .title{font-family:var(--serif);font-weight:600;font-size:1.65rem;letter-spacing:-.01em;margin-top:3px}
.brand .title em{font-style:italic;font-weight:500;color:var(--gold)}
.tools{display:flex;align-items:center;gap:8px}
.icon-btn,.user-btn{
  appearance:none;border:1px solid var(--line-strong);background:var(--card);cursor:pointer;
  border-radius:999px;height:36px;display:inline-flex;align-items:center;justify-content:center;gap:6px;
  font-size:.85rem;font-weight:700;color:var(--ink-soft);transition:border-color .15s,color .15s;
}
.icon-btn{width:36px}
.user-btn{padding:0 12px;max-width:180px}
.user-btn span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.icon-btn:hover,.user-btn:hover{border-color:var(--red);color:var(--ink)}
.icon-btn svg{width:18px;height:18px}
.sync-note{background:var(--gold-tint);color:var(--ink-soft);font-size:.85rem;text-align:center;padding:7px 16px;border-bottom:1px solid var(--line)}

/* Headings and text */
h1.page{font-family:var(--serif);font-weight:600;font-size:clamp(1.6rem,4.6vw,2.15rem);line-height:1.15;letter-spacing:-.01em;margin-bottom:4px}
.eyebrow{font-size:.75rem;letter-spacing:.2em;text-transform:uppercase;color:var(--red);font-weight:700;margin-bottom:6px}
.eyebrow a{text-decoration:none}
.eyebrow a:hover{text-decoration:underline}
p.lead{color:var(--ink-soft);margin-bottom:22px}
h2.sec{font-family:var(--serif);font-weight:600;font-size:1.25rem;margin:28px 0 12px}

/* Cards */
.cards{display:grid;gap:12px}
.card{
  display:block;background:var(--card);border:1px solid var(--line);border-radius:12px;
  padding:16px 18px;text-decoration:none;color:var(--ink);box-shadow:var(--shadow);
}
a.card{transition:border-color .15s,transform .15s}
a.card:hover{border-color:var(--red)}
a.card:active{transform:scale(.995)}
.card .name{font-family:var(--serif);font-weight:600;font-size:1.15rem;line-height:1.25}
.card .desc{color:var(--muted);font-size:.9rem;margin-top:2px}
.card.feature{border-left:4px solid var(--gold)}
.course-head{display:flex;align-items:baseline;justify-content:space-between;gap:10px;margin:26px 0 10px}
.course-head h2{font-family:var(--serif);font-weight:600;font-size:1.3rem}
.course-head h2 small{display:block;font-family:var(--sans);font-weight:400;font-size:.85rem;color:var(--muted)}
.course-head a{font-size:.9rem;font-weight:700;white-space:nowrap}

/* Progress meter */
.meter{display:flex;align-items:center;gap:10px;margin-top:10px;font-size:.82rem;color:var(--muted)}
.meter .track{flex:1;height:7px;border-radius:99px;background:var(--sunk);overflow:hidden;display:flex}
.meter .fill-good{background:var(--good)}
.meter .fill-seen{background:var(--gold);opacity:.55}
.meter .num{min-width:3.2em;text-align:right;font-variant-numeric:tabular-nums}

/* Tabs */
.tabs{display:flex;gap:2px;border-bottom:1px solid var(--line);margin:18px 0 22px;overflow-x:auto;scrollbar-width:none;position:sticky;top:0;background:var(--paper);z-index:5}
.tabs::-webkit-scrollbar{display:none}
.tab{
  text-decoration:none;color:var(--ink-soft);font-weight:700;font-size:.92rem;white-space:nowrap;
  padding:12px 14px;border-bottom:3px solid transparent;margin-bottom:-1px;
}
.tab:hover{color:var(--ink)}
.tab.active{color:var(--ink);border-bottom-color:var(--red)}
.tab .count{display:inline-block;min-width:1.5em;padding:0 .4em;margin-left:4px;border-radius:99px;background:var(--bad-tint);color:var(--bad);font-size:.75rem;text-align:center}

/* Buttons and form controls */
.btn{
  appearance:none;cursor:pointer;border-radius:10px;border:1px solid var(--line-strong);
  background:var(--card);color:var(--ink);font-weight:700;font-size:.95rem;padding:11px 18px;
  display:inline-flex;align-items:center;justify-content:center;gap:8px;text-decoration:none;
  transition:background .15s,border-color .15s;
}
.btn:hover{border-color:var(--red)}
.btn.primary{background:var(--red);border-color:var(--red);color:#fff}
:root[data-theme="dark"] .btn.primary{color:#2b2725}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .btn.primary{color:#2b2725}}
.btn.primary:hover{background:var(--red-deep);border-color:var(--red-deep)}
.btn.small{padding:7px 12px;font-size:.85rem;border-radius:8px}
.btn.ghost{background:none}
.btn.danger{color:var(--bad)}
.btn[disabled]{opacity:.5;cursor:default}
.row{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.field{display:block;margin-bottom:16px}
.field > span{display:block;font-size:.85rem;font-weight:700;color:var(--ink-soft);margin-bottom:6px}
input[type=text],input[type=password],select{
  width:100%;font:inherit;font-size:1rem;padding:11px 13px;border-radius:9px;
  border:1px solid var(--line-strong);background:var(--card);color:var(--ink);
}
input:focus,select:focus{outline:2px solid var(--red);outline-offset:1px;border-color:transparent}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{
  appearance:none;cursor:pointer;border:1px solid var(--line-strong);background:var(--card);
  border-radius:99px;padding:7px 14px;font-size:.9rem;font-weight:700;color:var(--ink-soft);
}
.chip.on{background:var(--red-tint);border-color:var(--red);color:var(--red-deep)}
.panel{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px;box-shadow:var(--shadow);margin-bottom:16px}
.panel h3{font-size:1rem;margin-bottom:10px}
.error{color:var(--bad);font-size:.9rem;margin-bottom:12px}

/* Question view */
.q-top{display:flex;justify-content:space-between;align-items:center;gap:10px;font-size:.85rem;color:var(--muted);margin-bottom:8px}
.q-progress{height:5px;border-radius:99px;background:var(--sunk);overflow:hidden;margin-bottom:20px}
.q-progress div{height:100%;background:var(--red);transition:width .25s}
.topic-tag{display:inline-block;font-size:.75rem;font-weight:700;letter-spacing:.04em;color:var(--gold);background:var(--gold-tint);border-radius:6px;padding:2px 8px;margin-bottom:10px}
.q-text{font-family:var(--serif);font-size:clamp(1.15rem,3.6vw,1.35rem);font-weight:500;line-height:1.4;margin-bottom:18px}
.options{display:grid;gap:10px}
.opt{
  appearance:none;text-align:left;cursor:pointer;display:flex;gap:12px;align-items:flex-start;
  background:var(--card);border:1.5px solid var(--line);border-radius:12px;padding:13px 14px;
  font-size:1rem;line-height:1.45;color:var(--ink);transition:border-color .12s,background .12s;
}
.opt:hover:not([disabled]){border-color:var(--red)}
.opt .letter{
  flex:none;width:28px;height:28px;border-radius:50%;border:1.5px solid var(--line-strong);
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.85rem;color:var(--ink-soft);
}
.opt[disabled]{cursor:default}
.opt.correct{border-color:var(--good);background:var(--good-tint)}
.opt.correct .letter{border-color:var(--good);background:var(--good);color:var(--card)}
.opt.wrong{border-color:var(--bad);background:var(--bad-tint)}
.opt.wrong .letter{border-color:var(--bad);background:var(--bad);color:var(--card)}
.opt.dim{opacity:.6}
.feedback{margin-top:16px;border-radius:12px;padding:14px 16px;border:1px solid var(--line);background:var(--card)}
.feedback .verdict{font-weight:700;margin-bottom:4px}
.feedback.good .verdict{color:var(--good)}
.feedback.bad .verdict{color:var(--bad)}
.feedback p{color:var(--ink-soft)}
.q-actions{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:18px}
.kbd-hint{font-size:.78rem;color:var(--muted)}
@media (hover:none){.kbd-hint{display:none}}

/* Results */
.score{font-family:var(--serif);font-size:3rem;font-weight:600;line-height:1;margin:6px 0}
.review-list{display:grid;gap:10px;margin-top:12px}
.review-item{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px 16px}
.review-item .q{font-weight:700;margin-bottom:6px}
.review-item .ans{color:var(--good);margin-bottom:4px}
.review-item .yours{color:var(--bad);margin-bottom:4px}
.review-item .why{color:var(--ink-soft);font-size:.93rem}
details.review-item summary{cursor:pointer;font-weight:700;list-style:none}
details.review-item summary::-webkit-details-marker{display:none}
details.review-item[open] summary{margin-bottom:8px}

/* Progress table */
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:18px}
.stat{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px 14px}
.stat b{display:block;font-family:var(--serif);font-size:1.6rem;font-weight:600;line-height:1.1}
.stat span{font-size:.8rem;color:var(--muted)}
.topic-rows{display:grid;gap:4px}
.topic-row{display:grid;grid-template-columns:minmax(0,1fr) 120px 3.2em;gap:12px;align-items:center;padding:9px 0;border-bottom:1px solid var(--line);font-size:.93rem}
.topic-row .bar{height:7px;border-radius:99px;background:var(--sunk);overflow:hidden;display:flex}
.topic-row .pct{text-align:right;font-variant-numeric:tabular-nums;color:var(--ink-soft)}
.topic-row button{all:unset;cursor:pointer;color:var(--ink)}
.topic-row button:hover{color:var(--red);text-decoration:underline}
@media (max-width:520px){.topic-row{grid-template-columns:minmax(0,1fr) 70px 3em}.stats{gap:8px}.stat b{font-size:1.3rem}}

/* Study guide */
.guide-toc{margin-bottom:18px}
.guide-toc select{max-width:420px}
.guide{font-size:1.02rem;line-height:1.7;max-width:70ch}
.guide > h1:first-child{display:none}
.guide h1{font-family:var(--serif);font-weight:600;font-size:1.6rem;line-height:1.2;margin:4px 0 12px}
.guide h2{font-family:var(--serif);font-weight:600;font-size:1.3rem;line-height:1.25;margin:34px 0 10px;padding-top:14px;border-top:1px solid var(--line);scroll-margin-top:60px}
.guide h3{font-size:1.05rem;margin:22px 0 6px}
.guide h4{font-size:1rem;margin:18px 0 6px;color:var(--ink-soft)}
.guide p{margin:0 0 12px}
.guide ul,.guide ol{margin:0 0 14px 1.4em}
.guide li{margin-bottom:6px}
.guide strong{color:var(--ink)}
.guide em{color:var(--ink-soft)}
.guide blockquote{border-left:3px solid var(--gold);background:var(--gold-tint);padding:10px 14px;border-radius:0 8px 8px 0;margin:0 0 16px;color:var(--ink-soft)}
.guide blockquote p:last-child{margin-bottom:0}
.guide hr{border:none;border-top:1px solid var(--line);margin:24px 0}
.guide code{font-size:.9em;background:var(--sunk);padding:1px 5px;border-radius:4px}
.guide .table-wrap{overflow-x:auto;margin:0 0 16px;border:1px solid var(--line);border-radius:10px}
.guide table{border-collapse:collapse;width:100%;font-size:.93rem}
.guide th,.guide td{text-align:left;vertical-align:top;padding:9px 12px;border-bottom:1px solid var(--line)}
.guide th{background:var(--sunk);font-weight:700}
.guide tr:last-child td{border-bottom:none}
.guide .fig{margin:6px 0 20px;text-align:center}
.guide .fig img,.guide .inline-img{max-width:100%;height:auto;background:#fff;border:1px solid var(--line);border-radius:10px;padding:8px;cursor:zoom-in}
.guide .inline-img{max-height:3em;vertical-align:middle;padding:4px}
.guide .fig figcaption{font-size:.88rem;color:var(--muted);margin-top:6px}
.img-missing{display:block;margin:6px 0 16px;padding:10px 12px;border:1px dashed var(--line-strong);border-radius:10px;color:var(--muted);font-size:.9rem}
.lightbox{position:fixed;inset:0;z-index:60;background:rgba(20,16,15,.88);display:flex;align-items:center;justify-content:center;padding:16px;cursor:zoom-out}
.lightbox img{max-width:100%;max-height:100%;background:#fff;border-radius:8px}
.to-top{position:fixed;right:16px;bottom:calc(16px + env(safe-area-inset-bottom));z-index:6}

/* Modal */
.modal-backdrop{position:fixed;inset:0;background:rgba(20,16,15,.5);z-index:50;display:flex;align-items:center;justify-content:center;padding:18px}
.modal{background:var(--paper);border:1px solid var(--line-strong);border-radius:14px;max-width:420px;width:100%;padding:24px;box-shadow:0 18px 50px rgba(0,0,0,.25);max-height:90vh;overflow:auto}
.modal h3{font-family:var(--serif);font-weight:600;font-size:1.4rem;margin-bottom:6px}
.modal p{color:var(--ink-soft);font-size:.93rem;margin-bottom:16px}
.modal .actions{display:flex;justify-content:flex-end;gap:10px;margin-top:6px;flex-wrap:wrap}
.user-list{display:grid;gap:8px;margin-bottom:16px}
.user-list button{
  appearance:none;cursor:pointer;text-align:left;border:1px solid var(--line);background:var(--card);
  border-radius:10px;padding:11px 14px;font-weight:700;
}
.user-list button:hover,.user-list button.on{border-color:var(--red)}
.linkish{appearance:none;background:none;border:none;color:var(--red);cursor:pointer;font-weight:700;padding:0;font-size:.9rem}

/* Admin */
.admin-table{width:100%;border-collapse:collapse;font-size:.9rem}
.admin-table th,.admin-table td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--line);vertical-align:top}
.admin-table th{font-size:.78rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}
.table-scroll{overflow-x:auto}
footer.foot{margin-top:40px;font-size:.8rem;color:var(--muted);text-align:center}
footer.foot a{color:var(--muted)}