/* ====== Team21 Health Platform — Shared Styles ====== */
:root{
  --ink:#0e1a14;
  --ink-soft:#2a3a32;
  --paper:#f4efe6;
  --paper-2:#ebe4d4;
  --paper-3:#e2d9c4;
  --rule:#cabb9c;
  --accent:#8a1f1f;
  --accent-2:#1f5a4a;
  --accent-3:#b8651b;
  --mute:#5d6b62;
  --gold:#a07a2a;
  --bad:#9b2226;
  --good:#2b6a4f;
  --shadow:0 1px 0 rgba(14,26,20,.06), 0 8px 24px -12px rgba(14,26,20,.18);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--paper);color:var(--ink);font-family:"Inter Tight",sans-serif;line-height:1.55;-webkit-font-smoothing:antialiased}
body{
  background-image:
    radial-gradient(1200px 600px at 80% -10%, rgba(31,90,74,.06), transparent 60%),
    radial-gradient(900px 500px at -10% 30%, rgba(138,31,31,.05), transparent 60%),
    repeating-linear-gradient(0deg, transparent 0 39px, rgba(14,26,20,.025) 39px 40px);
  min-height:100vh;
}
a{color:inherit}

/* ---------- NAV ---------- */
.nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(10px);background:rgba(244,239,230,.92);border-bottom:1px solid var(--rule)}
.nav-inner{max-width:1320px;margin:0 auto;padding:14px 28px;display:flex;align-items:center;gap:24px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink)}
.brand-mark{width:38px;height:38px;border:1.5px solid var(--ink);display:grid;place-items:center;font-family:"Fraunces",serif;font-weight:700;font-size:18px;background:var(--paper);position:relative}
.brand-mark::after{content:"";position:absolute;inset:3px;border:1px solid var(--ink);opacity:.35}
.brand-name{font-family:"Fraunces",serif;font-weight:600;font-size:19px;letter-spacing:-.01em;line-height:1}
.brand-sub{font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:var(--mute);margin-top:3px}
.nav-links{display:flex;gap:2px;flex-wrap:wrap;margin-left:auto}
.nav-links a{text-decoration:none;color:var(--ink-soft);font-size:13px;padding:8px 12px;border-radius:2px;font-weight:500;letter-spacing:.01em;position:relative;transition:color .15s}
.nav-links a:hover{color:var(--accent)}
.nav-links a.active{color:var(--accent);font-weight:600}
.nav-links a.active::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;background:var(--accent)}
.nav-cta{display:flex;gap:8px;align-items:center}
.nav-menu{position:relative}
.nav-menu-btn{background:none;border:none;font-family:inherit;font-size:13px;font-weight:500;letter-spacing:.01em;color:var(--ink-soft);padding:8px 12px;cursor:pointer;display:flex;align-items:center;gap:5px}
.nav-menu-btn:hover{color:var(--accent)}
.nav-menu-btn.active{color:var(--accent);font-weight:600}
.nav-menu-btn .caret{font-size:9px;opacity:.6;transition:transform .15s}
.nav-menu.open .nav-menu-btn .caret{transform:rotate(180deg)}
.nav-menu-pop{display:none;position:absolute;top:calc(100% + 6px);left:0;background:var(--paper);border:1px solid var(--ink);box-shadow:0 12px 30px rgba(14,26,20,.18);min-width:230px;padding:6px 0;z-index:60}
.nav-menu.open .nav-menu-pop{display:block;animation:fadeIn .15s ease}
.nav-menu-pop a{display:block;padding:9px 16px;font-size:13.5px;text-decoration:none;color:var(--ink-soft)}
.nav-menu-pop a:hover{background:var(--paper-2);color:var(--accent)}
.nav-menu-pop a.active{color:var(--accent);font-weight:600;background:var(--paper-2)}
.mobile-toggle{display:none;background:none;border:1px solid var(--ink);padding:8px 10px;cursor:pointer;font-family:inherit}
.btn{font-family:"Inter Tight",sans-serif;font-size:13px;font-weight:500;padding:9px 16px;border:1px solid var(--ink);background:transparent;color:var(--ink);cursor:pointer;letter-spacing:.02em;transition:all .15s ease;text-decoration:none;display:inline-block;text-align:center}
.btn:hover{background:var(--ink);color:var(--paper)}
.btn-primary{background:var(--ink);color:var(--paper)}
.btn-primary:hover{background:var(--accent);border-color:var(--accent)}
.btn-sm{padding:6px 12px;font-size:12px}
.btn-accent{background:var(--accent);color:var(--paper);border-color:var(--accent)}
.btn-accent:hover{background:var(--ink);border-color:var(--ink)}
.btn-block{display:block;width:100%}

/* ---------- LAYOUT ---------- */
.page{max-width:1320px;margin:0 auto;padding:60px 28px 40px}
.page-head{border-top:2px solid var(--ink);padding-top:24px;margin-bottom:40px;display:grid;grid-template-columns:1fr auto;gap:30px;align-items:end}
.page-head .eyebrow{font-size:11px;letter-spacing:.28em;text-transform:uppercase;color:var(--accent);font-weight:600;margin-bottom:14px;display:flex;align-items:center;gap:10px}
.page-head .eyebrow::before{content:"";width:30px;height:1px;background:var(--accent)}
.page-head h1{font-family:"Fraunces",serif;font-weight:400;font-size:clamp(40px,5.5vw,72px);line-height:1;letter-spacing:-.025em;margin:0;font-variation-settings:"opsz" 144}
.page-head h1 em{font-style:italic;color:var(--accent);font-weight:300}
.page-head p.intro{margin:18px 0 0;font-size:15.5px;color:var(--ink-soft);max-width:780px;line-height:1.6}
.page-head .meta{font-family:"JetBrains Mono",monospace;font-size:11px;color:var(--mute);letter-spacing:.05em;text-align:right;line-height:1.7}

/* ---------- SECTIONS ---------- */
section{margin-bottom:60px}
h2.sect{font-family:"Fraunces",serif;font-weight:400;font-size:clamp(28px,3.5vw,42px);letter-spacing:-.02em;margin:0 0 20px;line-height:1.1}
h2.sect em{font-style:italic;color:var(--accent)}
h3.sub{font-family:"Fraunces",serif;font-weight:500;font-size:22px;margin:0 0 12px;letter-spacing:-.01em}

/* ---------- USER BADGE ---------- */
.user-badge{display:flex;align-items:center;gap:10px;padding:6px 12px 6px 6px;background:var(--paper-2);border:1px solid var(--rule)}
.user-avatar{width:28px;height:28px;background:var(--accent);color:var(--paper);display:grid;place-items:center;font-family:"Fraunces",serif;font-weight:600;font-size:13px;border-radius:50%}
.user-badge .name{font-size:13px;font-weight:500}
.user-badge .logout{background:none;border:none;font-size:11px;color:var(--mute);cursor:pointer;text-transform:uppercase;letter-spacing:.1em;padding:0 4px}
.user-badge .logout:hover{color:var(--accent)}

/* ---------- AUTH MODAL ---------- */
.modal-backdrop{position:fixed;inset:0;background:rgba(14,26,20,.6);backdrop-filter:blur(6px);display:none;align-items:center;justify-content:center;z-index:100;padding:20px}
.modal-backdrop.open{display:flex}
.modal{background:var(--paper);max-width:440px;width:100%;padding:40px;border:1px solid var(--ink);box-shadow:0 30px 80px rgba(0,0,0,.4);position:relative}
.modal-close{position:absolute;top:14px;right:14px;background:none;border:none;font-size:22px;cursor:pointer;color:var(--mute)}
.modal h3{font-family:"Fraunces",serif;font-size:30px;font-weight:500;margin:0 0 6px;letter-spacing:-.01em}
.modal p.sub{font-size:13px;color:var(--mute);margin:0 0 24px}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}
.field label{font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-soft);font-weight:600}
.field input,.field textarea,.field select{padding:11px 14px;border:1px solid var(--rule);background:var(--paper);font-family:inherit;font-size:14px;color:var(--ink)}
.field textarea{resize:vertical;min-height:90px;line-height:1.5}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--accent)}
.auth-switch{margin-top:18px;font-size:13px;color:var(--mute);text-align:center}
.auth-switch a{color:var(--accent);text-decoration:underline;cursor:pointer}
.auth-msg{font-size:12px;margin-top:10px;padding:8px 10px;background:#fdecec;color:var(--bad);border-left:3px solid var(--bad);display:none}
.auth-msg.ok{background:#e9f1ec;color:var(--good);border-left-color:var(--good)}
.auth-msg.show{display:block}

/* ---------- FOOTER ---------- */
footer{background:var(--ink);color:var(--paper);padding:50px 28px 30px;margin-top:80px}
.foot-inner{max-width:1320px;margin:0 auto;display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.foot-brand .brand-name{color:var(--paper);font-size:24px}
.foot-brand p{font-size:13px;color:#a8b8af;line-height:1.6;margin:14px 0 0}
.foot-col h5{font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:#a8b8af;margin:0 0 14px}
.foot-col a{display:block;color:var(--paper);text-decoration:none;font-size:13px;padding:4px 0;opacity:.85}
.foot-col a:hover{opacity:1;color:#d6a657}
.foot-bottom{max-width:1320px;margin:40px auto 0;padding-top:24px;border-top:1px solid #2a3a32;font-size:12px;color:#a8b8af;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px}
.foot-bottom .copy{font-family:"Fraunces",serif;font-style:italic}

/* ---------- TOPIC CARDS ---------- */
.topic-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--rule);border:1px solid var(--rule)}
.topic{background:var(--paper);padding:30px;position:relative;transition:background .2s ease}
.topic:hover{background:var(--paper-2)}
.topic-header{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:14px}
.topic-name{font-family:"Fraunces",serif;font-size:23px;font-weight:500;line-height:1.15;margin:0;letter-spacing:-.01em}
.topic-name small{display:block;font-family:"Inter Tight",sans-serif;font-size:12px;font-weight:400;color:var(--mute);margin-top:4px;font-style:italic}
.iarc{font-family:"JetBrains Mono",monospace;font-size:10px;padding:4px 8px;border:1px solid;letter-spacing:.05em;white-space:nowrap;font-weight:600}
.iarc.g1{background:#fdecec;color:var(--bad);border-color:var(--bad)}
.iarc.g2a{background:#fdf2e0;color:var(--accent-3);border-color:var(--accent-3)}
.iarc.g2b{background:#fff8e0;color:var(--gold);border-color:var(--gold)}
.iarc.lifestyle{background:#e9f1ec;color:var(--good);border-color:var(--good)}
.topic-body{font-size:14px;color:var(--ink-soft);line-height:1.6}
.topic-block{margin-top:14px}
.topic-block h5{font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);margin:0 0 6px;font-weight:600}
.topic-block p,.topic-block ul{margin:0;font-size:13.5px;line-height:1.55;color:var(--ink-soft)}
.topic-block ul{padding-left:18px}
.topic-block ul li{margin-bottom:3px}
.topic-cite{margin-top:16px;padding-top:12px;border-top:1px dashed var(--rule);font-size:11px;color:var(--mute);font-style:italic;line-height:1.45}
.topic-cite strong{font-style:normal;color:var(--ink);font-weight:600}
.topic-actions{display:flex;gap:8px;margin-top:14px;padding-top:12px;border-top:1px dashed var(--rule)}
.action-btn{font-size:11px;letter-spacing:.06em;text-transform:uppercase;background:none;border:1px solid var(--rule);padding:6px 10px;cursor:pointer;font-family:inherit;color:var(--ink-soft);transition:all .15s}
.action-btn:hover{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.action-btn.active{background:var(--accent);color:var(--paper);border-color:var(--accent)}

/* ---------- CATEGORY TABS ---------- */
.cat-tabs{display:flex;gap:0;flex-wrap:wrap;margin-bottom:30px;border-bottom:1px solid var(--rule)}
.cat-tab{padding:14px 20px;font-size:13px;font-weight:500;letter-spacing:.02em;color:var(--mute);background:none;border:none;cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-1px;font-family:inherit}
.cat-tab:hover{color:var(--ink)}
.cat-tab.active{color:var(--accent);border-bottom-color:var(--accent);font-weight:600}
.cat-panel{display:none}
.cat-panel.active{display:block;animation:fadeIn .3s ease}
@keyframes fadeIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

/* ---------- SEARCH BAR ---------- */
.search-bar{display:flex;align-items:center;gap:10px;padding:10px 14px;background:var(--paper);border:1px solid var(--rule);max-width:520px;margin-bottom:24px}
.search-bar input{border:none;background:none;flex:1;font-family:inherit;font-size:14px;color:var(--ink);outline:none;padding:4px 0}
.search-bar svg{flex-shrink:0;color:var(--mute)}

/* ---------- INFO CARDS / GRID ---------- */
.info-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px}
.info-card{background:var(--paper);border:1px solid var(--rule);padding:28px;position:relative}
.info-card::before{content:"";position:absolute;top:0;left:0;width:60px;height:3px;background:var(--accent)}
.info-card h4{font-family:"Fraunces",serif;font-size:22px;font-weight:500;margin:0 0 12px;letter-spacing:-.01em}
.info-card p{font-size:14px;color:var(--ink-soft);margin:0 0 10px;line-height:1.6}
.info-card ul{padding-left:18px;font-size:13.5px;color:var(--ink-soft);margin:8px 0}
.info-card li{margin-bottom:5px}

/* ---------- DISCLAIMER ---------- */
.disclaimer{background:#fdf6e7;border:1px solid #d8c890;padding:24px;margin:40px 0 0;font-size:13px;line-height:1.65;color:#5b4a1c}
.disclaimer strong{display:block;font-family:"Fraunces",serif;font-size:18px;color:#4b3a0d;margin-bottom:6px;letter-spacing:.02em}

/* ---------- TOAST ---------- */
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(60px);background:var(--ink);color:var(--paper);padding:12px 20px;font-size:13px;letter-spacing:.02em;opacity:0;transition:all .25s ease;z-index:200;box-shadow:0 8px 28px rgba(0,0,0,.25)}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.toast.error{background:var(--bad)}
.toast.success{background:var(--good)}

/* ---------- LOGIN PROMPT ---------- */
.login-prompt{background:var(--paper);border:1px dashed var(--rule);padding:36px;text-align:center;margin:30px 0}
.login-prompt h3{font-family:"Fraunces",serif;font-size:26px;margin:0 0 10px;font-weight:500}
.login-prompt p{color:var(--ink-soft);margin:0 0 18px;font-size:14px}

/* ---------- BODY SYSTEM PAGES ---------- */
.system-hero{display:grid;grid-template-columns:1.4fr 1fr;gap:40px;align-items:start;margin-bottom:40px}
.system-hero .figure{background:var(--paper);border:1px solid var(--rule);padding:30px;display:grid;place-items:center;min-height:260px;font-family:"Fraunces",serif;font-size:18px;color:var(--mute);font-style:italic;position:relative;overflow:hidden}
.system-hero .figure svg{max-width:100%;height:auto}
.kv-grid{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--rule);border:1px solid var(--rule);margin:24px 0}
.kv{background:var(--paper);padding:18px}
.kv .k{font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--accent);font-weight:600;margin-bottom:6px}
.kv .v{font-family:"Fraunces",serif;font-size:22px;font-weight:500;line-height:1.2}
.kv .s{font-size:12px;color:var(--mute);margin-top:4px;font-style:italic}

/* tip cards */
.tip-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin:20px 0}
.tip{background:var(--paper);border:1px solid var(--rule);padding:24px;position:relative;display:flex;flex-direction:column;gap:8px;transition:transform .2s ease,box-shadow .2s ease}
.tip:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.tip .num{font-family:"JetBrains Mono",monospace;font-size:11px;color:var(--accent);letter-spacing:.12em}
.tip h4{font-family:"Fraunces",serif;font-size:20px;margin:0;font-weight:500;letter-spacing:-.01em;line-height:1.2}
.tip p{font-size:13.5px;color:var(--ink-soft);margin:0;line-height:1.55}
.tip .ev{font-size:11px;color:var(--mute);font-style:italic;margin-top:auto;padding-top:8px;border-top:1px dashed var(--rule)}
@media (max-width:960px){.tip-grid{grid-template-columns:1fr}.system-hero{grid-template-columns:1fr}}

/* warning blocks */
.warn{background:#fdecec;border:1px solid #e6b5b5;border-left:4px solid var(--accent);padding:20px 22px;margin:16px 0;font-size:14px;color:#5b1a1a;line-height:1.6}
.warn strong{display:block;font-family:"Fraunces",serif;font-size:17px;color:var(--accent);margin-bottom:6px;letter-spacing:.01em}
.note{background:#e9f1ec;border:1px solid #b8d3c4;border-left:4px solid var(--good);padding:20px 22px;margin:16px 0;font-size:14px;color:#1a4a36;line-height:1.6}
.note strong{display:block;font-family:"Fraunces",serif;font-size:17px;color:var(--good);margin-bottom:6px}

/* numbered lists with style */
.steps{list-style:none;padding:0;margin:0;counter-reset:s;display:grid;gap:1px;background:var(--rule);border:1px solid var(--rule)}
.steps li{background:var(--paper);padding:18px 22px 18px 64px;position:relative;counter-increment:s;font-size:14px;color:var(--ink-soft);line-height:1.6}
.steps li::before{content:counter(s,decimal-leading-zero);position:absolute;left:18px;top:18px;font-family:"Fraunces",serif;font-size:24px;color:var(--accent);font-weight:500}
.steps li strong{display:block;color:var(--ink);font-weight:600;font-family:"Fraunces",serif;font-size:17px;margin-bottom:4px;letter-spacing:-.005em}

/* sleep cycle visualization */
.sleep-cycle{background:var(--paper);border:1px solid var(--rule);padding:24px;margin:20px 0}
.sleep-cycle h4{font-family:"Fraunces",serif;font-size:22px;margin:0 0 16px;font-weight:500}
.sleep-stages{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--rule);border:1px solid var(--rule)}
.sleep-stage{background:var(--paper);padding:18px;display:flex;flex-direction:column;gap:4px}
.sleep-stage .lbl{font-family:"JetBrains Mono",monospace;font-size:11px;letter-spacing:.1em;color:var(--accent)}
.sleep-stage .nm{font-family:"Fraunces",serif;font-size:18px;font-weight:500}
.sleep-stage .pct{font-size:12px;color:var(--mute)}
.sleep-stage p{font-size:13px;color:var(--ink-soft);margin:6px 0 0;line-height:1.5}
@media (max-width:960px){.sleep-stages{grid-template-columns:1fr 1fr}}

/* natural remedies cards */
.remedy-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--rule);border:1px solid var(--rule)}
.remedy{background:var(--paper);padding:26px 28px;display:flex;flex-direction:column;gap:10px}
.remedy:hover{background:var(--paper-2)}
.remedy-head{display:flex;align-items:center;gap:14px}
.remedy-icon{width:48px;height:48px;border:1.5px solid var(--ink);display:grid;place-items:center;font-size:24px;background:var(--paper-2);flex-shrink:0}
.remedy h3{font-family:"Fraunces",serif;font-size:22px;margin:0;font-weight:500;letter-spacing:-.01em;line-height:1.15}
.remedy h3 small{display:block;font-family:"Inter Tight",sans-serif;font-size:12px;font-weight:400;color:var(--mute);font-style:italic;margin-top:2px}
.remedy .uses{font-size:13.5px;color:var(--ink-soft);line-height:1.55}
.remedy .uses strong{color:var(--ink)}
.remedy .ev{font-size:11px;color:var(--mute);font-style:italic;margin-top:auto;padding-top:10px;border-top:1px dashed var(--rule)}
@media (max-width:760px){.remedy-grid{grid-template-columns:1fr}}

/* african-diet specific */
.food-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--rule);border:1px solid var(--rule);margin:20px 0}
.food-row{background:var(--paper);padding:22px 24px;display:flex;flex-direction:column;gap:8px}
.food-row.good{border-left:4px solid var(--good)}
.food-row.bad{border-left:4px solid var(--accent)}
.food-row.mid{border-left:4px solid var(--accent-3)}
.food-row h5{font-family:"Fraunces",serif;font-size:19px;margin:0;font-weight:500;display:flex;align-items:center;gap:10px}
.food-row .tag{font-size:10px;letter-spacing:.1em;text-transform:uppercase;padding:2px 6px;background:var(--paper-2);font-weight:600;color:var(--mute)}
.food-row.good .tag{background:#e9f1ec;color:var(--good)}
.food-row.bad .tag{background:#fdecec;color:var(--accent)}
.food-row.mid .tag{background:#fdf2e0;color:var(--accent-3)}
.food-row p{font-size:13.5px;color:var(--ink-soft);margin:0;line-height:1.55}
.food-row .why{font-size:12px;color:var(--mute);font-style:italic}
@media (max-width:760px){.food-grid{grid-template-columns:1fr}}

/* cooking methods comparison */
.cook-table{width:100%;border-collapse:collapse;margin:20px 0;background:var(--paper);border:1px solid var(--rule)}
.cook-table th{background:var(--paper-2);text-align:left;padding:14px 16px;font-size:12px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--accent);border-bottom:1px solid var(--rule)}
.cook-table td{padding:14px 16px;font-size:13.5px;color:var(--ink-soft);border-bottom:1px solid var(--rule);vertical-align:top;line-height:1.55}
.cook-table tr:last-child td{border-bottom:none}
.cook-table .rank{font-family:"Fraunces",serif;font-size:18px;font-weight:500;color:var(--ink)}
.cook-table .pill{display:inline-block;font-size:10px;padding:2px 8px;letter-spacing:.08em;text-transform:uppercase;font-weight:600}
.cook-table .pill.best{background:#e9f1ec;color:var(--good)}
.cook-table .pill.good{background:#f0e8d5;color:var(--gold)}
.cook-table .pill.caution{background:#fdf2e0;color:var(--accent-3)}
.cook-table .pill.bad{background:#fdecec;color:var(--accent)}

/* quiz UI */
.quiz-card{background:var(--paper);border:1px solid var(--rule);padding:30px;margin-bottom:1px;transition:background .15s}
.quiz-card.active{background:var(--paper-2)}
.quiz-head{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:14px}
.quiz-head h3{font-family:"Fraunces",serif;font-size:22px;margin:0;font-weight:500;letter-spacing:-.01em;line-height:1.25}
.quiz-meta{font-family:"JetBrains Mono",monospace;font-size:11px;color:var(--mute);letter-spacing:.08em;white-space:nowrap}
.q-options{display:grid;gap:8px;margin:12px 0}
.q-option{padding:12px 14px;border:1px solid var(--rule);background:var(--paper);cursor:pointer;font-size:14px;color:var(--ink);text-align:left;font-family:inherit;transition:all .12s;display:flex;align-items:center;gap:10px}
.q-option:hover{border-color:var(--ink)}
.q-option .letter{width:24px;height:24px;border:1px solid var(--rule);display:inline-grid;place-items:center;font-family:"JetBrains Mono",monospace;font-size:11px;font-weight:600;flex-shrink:0;background:var(--paper-2)}
.q-option.selected{border-color:var(--accent);background:#fdecec}
.q-option.correct{border-color:var(--good);background:#e9f1ec;color:var(--good);font-weight:500}
.q-option.correct .letter{background:var(--good);color:var(--paper);border-color:var(--good)}
.q-option.wrong{border-color:var(--accent);background:#fdecec;color:var(--accent);font-weight:500}
.q-option.wrong .letter{background:var(--accent);color:var(--paper);border-color:var(--accent)}
.q-option:disabled{cursor:default}
.q-explain{margin-top:12px;padding:12px 16px;background:var(--paper-2);border-left:3px solid var(--accent-2);font-size:13.5px;line-height:1.6;color:var(--ink-soft);display:none}
.q-explain.show{display:block}
.q-explain strong{color:var(--ink);display:block;margin-bottom:4px;font-family:"Fraunces",serif;font-size:15px}
.quiz-score{background:var(--ink);color:var(--paper);padding:24px;margin-top:24px;display:none;text-align:center}
.quiz-score.show{display:block}
.quiz-score h3{font-family:"Fraunces",serif;font-size:30px;margin:0 0 6px;font-weight:500;color:var(--paper)}
.quiz-score p{font-size:14px;margin:0;color:#d0d6d3}
.quiz-score .pct{font-family:"Fraunces",serif;font-size:60px;line-height:1;font-weight:500;color:#d6a657;margin:10px 0}

/* anatomy/system overview cards */
.system-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin:20px 0}
.sys-card{background:var(--paper);border:1px solid var(--rule);padding:26px;text-decoration:none;color:inherit;display:flex;flex-direction:column;gap:10px;transition:transform .2s ease,box-shadow .2s ease,background .2s ease}
.sys-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);background:var(--paper-2)}
.sys-card .icon{font-size:28px;line-height:1}
.sys-card h3{font-family:"Fraunces",serif;font-size:21px;margin:0;font-weight:500;letter-spacing:-.01em}
.sys-card p{font-size:13.5px;color:var(--ink-soft);margin:0;line-height:1.5;flex:1}
.sys-card .arrow{display:flex;align-items:center;gap:8px;font-size:11px;font-weight:500;color:var(--accent);text-transform:uppercase;letter-spacing:.1em;margin-top:6px}
@media (max-width:960px){.system-grid{grid-template-columns:1fr}}

/* ---------- RESPONSIVE ---------- */
@media (max-width:960px){
  .nav-inner{flex-wrap:wrap}
  .nav-links{display:none;width:100%;flex-direction:column;padding-top:14px;border-top:1px solid var(--rule);margin-top:8px;gap:0}
  .nav-links.open{display:flex}
  .nav-links a{padding:10px 0}
  .mobile-toggle{display:block;order:99}
  .nav-cta{order:98;margin-left:auto}
  .page-head{grid-template-columns:1fr}
  .page-head .meta{text-align:left}
  .topic-grid{grid-template-columns:1fr}
  .info-grid{grid-template-columns:1fr}
  .foot-inner{grid-template-columns:1fr 1fr;gap:30px}
}

/* ---------- PRINT ---------- */
@media print{
  .nav,.modal-backdrop,footer,.btn,.cat-tabs,.search-bar,.topic-actions,.action-btn{display:none !important}
  body{background:#fff !important}
  .cat-panel{display:block !important;page-break-inside:avoid}
  .page{padding:30px 0}
  .topic-grid{grid-template-columns:1fr 1fr}
}

/* Language toggle button */
.lang-toggle{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-family:"JetBrains Mono",monospace;
  font-size:11px;
  letter-spacing:.1em;
  padding:6px 10px;
}
.lang-toggle .lang-flag{font-size:14px;line-height:1}
.lang-toggle .lang-label{font-weight:600}
.lang-toggle:hover{background:var(--bg-3);border-color:var(--accent)}