:root{--bg:#11110f;--panel:#1b1b18;--panel2:#23231f;--text:#f4f1e8;--muted:#aaa79d;--line:#34342e;--accent:#e6b85c;--good:#89c68a;--bad:#e18a7b;--max:1080px}*{box-sizing:border-box}html{background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,sans-serif}body{margin:0;background:radial-gradient(circle at 85% -10%,#2c2719 0,transparent 30%),var(--bg);min-height:100vh}a{color:inherit;text-decoration:none}.topbar{position:sticky;top:0;z-index:10;backdrop-filter:blur(16px);background:#11110fe8;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:14px max(18px,calc((100vw - var(--max))/2))}.brand{display:flex;gap:10px;align-items:center;font-weight:800}.brand-mark{display:grid;place-items:center;width:34px;height:34px;border:1px solid var(--accent);border-radius:50%;font-size:12px;color:var(--accent)}nav{display:flex;gap:16px;align-items:center;font-size:14px}nav a,.linkbtn{color:var(--muted)}nav a:hover,.linkbtn:hover{color:var(--text)}.inline{display:inline}.linkbtn{border:0;background:none;padding:0;cursor:pointer}.shell{max-width:var(--max);margin:0 auto;padding:46px 18px 90px}.hero{display:grid;grid-template-columns:1.7fr .7fr;gap:28px;align-items:end;margin-bottom:28px}.hero h1,.lesson-page>h1{font-size:clamp(38px,6vw,76px);line-height:.96;letter-spacing:-.045em;margin:12px 0 20px}.hero p,.lede{font-size:19px;line-height:1.6;color:#c4c0b5;max-width:760px}.eyebrow{font-size:11px;letter-spacing:.15em;font-weight:800;color:var(--accent);text-transform:uppercase}.card{background:linear-gradient(180deg,var(--panel2),var(--panel));border:1px solid var(--line);border-radius:20px;padding:24px}.progress-card{min-width:220px}.big-number{font-size:58px;font-weight:800;letter-spacing:-.06em}.progress{height:8px;background:#33322b;border-radius:10px;overflow:hidden;margin:20px 0 8px}.progress span{height:100%;display:block;background:var(--accent)}.lesson-next{margin:22px 0 28px;padding:34px}.lesson-next h2{font-size:34px;margin:10px 0}.button{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:12px;padding:12px 17px;font-weight:750;cursor:pointer;margin-top:8px}.button.primary{background:var(--accent);color:#1b160a;border-color:var(--accent)}.button.ghost{background:transparent;color:var(--text)}.grid2{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:18px 0}.action-card{transition:.15s transform,.15s border-color}.action-card:hover{transform:translateY(-2px);border-color:#5a5548}.cards{display:grid;gap:14px}.compact{padding:18px}.muted,small{color:var(--muted)}h1{font-size:48px;letter-spacing:-.04em}h2{font-size:26px;letter-spacing:-.025em}h3{margin-bottom:6px}.module-block{margin:34px 0}.module-head{display:flex;gap:14px;align-items:center}.module-no{color:var(--accent);font-size:13px;font-weight:800}.lesson-list{border-top:1px solid var(--line)}.lesson-row{display:flex;gap:14px;align-items:center;padding:16px 4px;border-bottom:1px solid var(--line)}.lesson-row:hover{background:#ffffff04}.status-dot{width:34px;height:34px;border-radius:50%;border:1px solid var(--line);display:grid;place-items:center;color:var(--muted);font-size:12px}.lesson-row.done .status-dot{border-color:#527c52;color:var(--good)}.grow{display:flex;flex-direction:column;gap:5px;flex:1}.lesson-page{max-width:900px;margin:auto}.lesson-page section{margin:20px 0}.lesson-page .card p{line-height:1.72;color:#d4d0c4}.checklist,.mistakes{padding:0;list-style:none}.checklist li,.mistakes li{padding:8px 0;border-bottom:1px solid #ffffff0c}.checklist li:before{content:'✓';color:var(--good);margin-right:10px}.mistakes li:before{content:'×';color:var(--bad);margin-right:10px}.chips{display:flex;flex-wrap:wrap;gap:8px}.chips span{border:1px solid var(--line);padding:9px 12px;border-radius:999px;color:#d6d1c3}.video-grid{display:grid;gap:18px}.video{aspect-ratio:16/9;border-radius:14px;overflow:hidden;background:#000}.video iframe{width:100%;height:100%;border:0}.practice{border-color:#5a4930;background:linear-gradient(180deg,#2a2419,#1b1914)}.stack{display:grid;gap:13px}.stack label:not(.option){display:grid;gap:7px;color:var(--muted);font-size:13px}input,textarea,select{width:100%;background:#11110f;border:1px solid var(--line);color:var(--text);padding:12px;border-radius:10px;font:inherit}textarea{resize:vertical}.option{display:flex;gap:10px;align-items:flex-start;background:#151512;border:1px solid var(--line);padding:13px;border-radius:12px;cursor:pointer}.option input{width:auto;margin-top:3px}.alert{padding:12px 14px;border-radius:10px;margin:12px 0}.alert.good{background:#162517;border:1px solid #355e38;color:#b8e7ba}.alert.bad{background:#291817;border:1px solid #6b3832;color:#f0bab1}.auth-card{max-width:480px;margin:8vh auto}.auth-card h1{font-size:38px}.journal-cards{margin-top:18px}.journal-meta{display:flex;justify-content:space-between;gap:12px}.journal-photo{width:100%;max-height:520px;object-fit:cover;border-radius:14px;margin-top:10px;border:1px solid var(--line)}@media(max-width:720px){.topbar{padding:10px 14px}.brand span:last-child{display:none}nav{gap:11px;font-size:13px}.shell{padding-top:30px}.hero{grid-template-columns:1fr}.grid2{grid-template-columns:1fr}.hero h1,.lesson-page>h1{font-size:42px}.progress-card{min-width:0}.lesson-next{padding:24px}.lesson-next h2{font-size:27px}h1{font-size:39px}.card{border-radius:16px;padding:19px}}

/* 0.3.0 navigation */
.topbar{gap:14px;overflow:hidden}.nav-tabs{display:flex;gap:8px;align-items:center;overflow-x:auto;scrollbar-width:none;flex:1;justify-content:center;padding:2px}.nav-tabs::-webkit-scrollbar{display:none}.nav-item{display:flex;align-items:center;gap:7px;min-width:max-content;padding:9px 12px;border:1px solid transparent;border-radius:13px;color:var(--muted);font-size:12px;font-weight:700;transition:.16s ease;background:#ffffff00}.nav-item span{display:grid;place-items:center;min-width:24px;height:24px;padding:0 5px;border-radius:8px;background:#ffffff08;color:#d8c89d;font-size:12px}.nav-item b{font-weight:750}.nav-item:hover{color:var(--text);background:#ffffff06;border-color:#ffffff0b}.nav-item.active{color:#17130a;background:linear-gradient(180deg,#f0c76f,#dba84a);border-color:#f1cd7c;box-shadow:0 8px 24px #00000026}.nav-item.active span{background:#251d0e;color:#f5cf7d}.logout-form{margin:0}.logout-btn{width:36px;height:36px;border:1px solid var(--line);border-radius:11px;background:#191916;color:var(--muted);font-size:17px;cursor:pointer}.logout-btn:hover{color:var(--text);border-color:#5b584d}

/* checkpoints */
.checkpoint-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:28px}.checkpoint-card{display:block;transition:.16s transform,.16s border-color}.checkpoint-card:hover{transform:translateY(-3px);border-color:#655d49}.checkpoint-card.passed{border-color:#426345;background:linear-gradient(180deg,#213021,#181d17)}.checkpoint-top{display:flex;justify-content:space-between;align-items:center;gap:10px}.checkpoint-no{font-size:12px;letter-spacing:.16em;color:var(--accent);font-weight:900}.checkpoint-badge{padding:6px 9px;border-radius:999px;background:#203520;color:#a9dfad;font-size:11px;font-weight:800}.checkpoint-badge.retry{background:#35251c;color:#e8b08a}.checkpoint-badge.new{background:#292923;color:#c8c3b6}.checkpoint-card h2{margin:18px 0 8px}.checkpoint-score{margin-top:20px;padding-top:14px;border-top:1px solid #ffffff10;color:var(--muted);font-size:13px}.checkpoint-question{margin:16px 0}.checkpoint-question .option{margin:8px 0}.checkpoint-submit{position:sticky;bottom:18px;box-shadow:0 10px 34px #0008;margin:20px 0}.result-card{margin:24px 0}.result-card.passed{border-color:#426345}.result-card.retry{border-color:#74463b}.good-text{color:var(--good)}.bad-text{color:var(--bad)}.answer-note{margin-top:14px;padding-top:12px;border-top:1px solid #ffffff0d}

@media(max-width:920px){.topbar{display:grid;grid-template-columns:auto 1fr auto;padding:10px 12px}.nav-tabs{justify-content:flex-start}.nav-item{padding:8px 10px}.nav-item b{display:none}.nav-item span{min-width:28px;height:28px}.brand span:last-child{display:none}}
@media(max-width:720px){.topbar{grid-template-columns:auto minmax(0,1fr) auto;gap:8px}.brand-mark{width:32px;height:32px}.nav-tabs{gap:6px}.nav-item{border-radius:11px;padding:5px}.nav-item span{background:transparent}.nav-item.active span{background:#251d0e}.checkpoint-grid{grid-template-columns:1fr}.checkpoint-card{padding:20px}}

/* 0.4.0 readable navigation */
.nav-item .nav-label{display:block!important;white-space:nowrap}.logout-btn{width:auto;min-width:74px;padding:0 11px;display:flex;align-items:center;justify-content:center;gap:7px}.logout-btn b{font-size:11px;font-weight:800}.brand-name{white-space:nowrap}
@media(max-width:1100px){.topbar{display:grid;grid-template-columns:auto 1fr auto;grid-template-areas:"brand spacer logout" "nav nav nav";gap:8px 12px;padding:10px 14px}.brand{grid-area:brand}.nav-tabs{grid-area:nav;width:100%;justify-content:flex-start;padding:4px 0 2px}.logout-form{grid-area:logout}.nav-item{min-width:88px;justify-content:center;padding:8px 10px}.nav-item .nav-label{font-size:11px}}
@media(max-width:720px){.topbar{grid-template-columns:auto 1fr auto;grid-template-areas:"brand spacer logout" "nav nav nav";padding:9px 10px}.brand-name{display:block!important;font-size:13px}.nav-tabs{gap:7px}.nav-item{min-width:84px;flex-direction:column;gap:3px;padding:6px 7px;border-color:#ffffff0a;background:#171713}.nav-item .nav-icon{min-width:24px;height:22px;background:transparent}.nav-item .nav-label{font-size:10px;line-height:1.1}.nav-item.active{box-shadow:none}.logout-btn{min-width:38px;width:38px;padding:0}.logout-btn b{display:none}}

/* 0.5.0 visuals + hygiene */
.visual-grid{display:grid;gap:18px}.visual-card{margin:0;padding:14px;overflow:hidden}.lesson-visual{display:block;width:100%;height:auto;border-radius:14px;border:1px solid #ffffff12;background:#151511}.visual-card figcaption{display:grid;gap:5px;padding:14px 8px 4px}.visual-card figcaption span{color:var(--muted);line-height:1.5}.sources-card{border-color:#343b34}.source-links{display:grid;gap:9px}.source-links a{display:flex;justify-content:space-between;gap:12px;padding:12px 14px;border-radius:12px;border:1px solid var(--line);background:#ffffff04}.source-links a:hover{border-color:#6d6655}.hygiene-card{border-color:#405749;background:linear-gradient(180deg,#202a22,#191d19)}.hygiene-overview{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(240px,.5fr);gap:22px;align-items:center;margin:26px 0}.hygiene-list{margin-top:24px}.hygiene-list .lesson-row{padding:18px 8px}@media(max-width:720px){.hygiene-overview{grid-template-columns:1fr}.visual-card{padding:8px}.visual-card figcaption{padding:12px 8px 6px}.source-links a{font-size:14px}}

/* 0.6.0 products + lesson photos */
.products-hero,.lab-hero{display:flex;justify-content:space-between;gap:24px;align-items:end;margin-bottom:24px}.products-hero h1,.lab-hero h1{font-size:clamp(40px,6vw,72px);line-height:.98;letter-spacing:-.045em;margin:10px 0 16px}.product-tools{display:grid;gap:14px;margin-bottom:20px}.product-search{display:grid;gap:7px;color:var(--muted);font-size:12px}.product-filters{display:flex;gap:8px;overflow-x:auto;padding-bottom:4px}.filter-chip{white-space:nowrap;border:1px solid var(--line);background:#171714;color:var(--muted);padding:8px 11px;border-radius:999px;cursor:pointer}.filter-chip.active{background:var(--accent);color:#19140a;border-color:var(--accent)}
.product-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.product-card{padding:0;overflow:hidden;transition:.16s transform,.16s border-color}.product-card:hover{transform:translateY(-3px);border-color:#625d50}.product-photo-wrap{aspect-ratio:4/3;background:#151512;overflow:hidden}.product-photo{width:100%;height:100%;object-fit:cover;display:block}.product-photo-placeholder{width:100%;height:100%;display:grid;place-items:center;align-content:center;gap:6px;background:radial-gradient(circle at 50% 30%,#36301f,#171714)}.product-photo-placeholder span{font-size:46px;font-weight:850;color:var(--accent)}.product-photo-placeholder small{font-size:11px}.product-card-body{padding:18px}.product-category{display:inline-block;font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--accent);font-weight:800}.product-card h2{margin:7px 0 8px;font-size:24px}.product-card p{color:#c9c5ba;line-height:1.5}.mini-chips{display:flex;flex-wrap:wrap;gap:6px}.mini-chips span{font-size:10px;padding:6px 8px;border-radius:999px;background:#ffffff08;color:#c7c2b5}.product-empty{text-align:center;margin-top:18px}
.product-detail{max-width:980px;margin:auto}.backlink{display:inline-block;color:var(--muted);margin-bottom:18px}.product-detail-hero{display:grid;grid-template-columns:minmax(260px,.9fr) 1.2fr;gap:28px;align-items:center;margin-bottom:24px}.product-detail-photo,.product-detail-placeholder{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:20px;border:1px solid var(--line);background:#171714}.product-detail-placeholder{display:grid;place-items:center;font-size:72px;color:var(--accent);font-weight:900}.photo-credit{display:block;margin-top:7px;line-height:1.4}.photo-credit a{color:var(--accent)}.product-detail h1{font-size:clamp(42px,7vw,76px);margin:8px 0 16px;letter-spacing:-.05em}.property-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:20px 0}.property-icon{font-size:28px}.warning-card{border-color:#59463b}.product-next{display:flex;justify-content:space-between;gap:24px;align-items:center;margin-top:20px}
.lesson-photo-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;margin:20px 0}.lesson-photo-card{padding:0;overflow:hidden}.lesson-photo-card img{width:100%;aspect-ratio:4/3;object-fit:cover;display:block}.lesson-photo-card figcaption{padding:13px 15px;display:grid;gap:6px}.lesson-photo-card small{line-height:1.35}.lesson-photo-card a{color:var(--accent)}
.lab-card{max-width:760px;margin:20px auto}.lab-top{display:flex;justify-content:space-between;align-items:center;gap:12px}.lab-media{margin:18px 0}.lab-media img{width:100%;max-height:380px;object-fit:cover;border-radius:16px;border:1px solid var(--line)}.lab-media .product-photo-placeholder{height:260px;border-radius:16px}.lab-card>h2{font-size:38px;margin:12px 0}.lab-prompt{background:#151512;border:1px solid var(--line);border-radius:14px;padding:16px;margin:15px 0}.lab-prompt li{margin:7px 0}.lab-answer{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:18px 0}.lab-answer>div{padding:13px;border:1px solid var(--line);border-radius:12px;background:#171714}.lab-answer span{font-size:10px;letter-spacing:.1em;color:var(--accent);text-transform:uppercase;font-weight:800}.lab-answer p{margin:7px 0 0;line-height:1.5}
@media(max-width:900px){.product-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.product-detail-hero{grid-template-columns:1fr}.products-hero,.lab-hero,.product-next{align-items:flex-start;flex-direction:column}}
@media(max-width:620px){.product-grid{grid-template-columns:1fr}.property-grid,.lab-answer{grid-template-columns:1fr}.products-hero h1,.lab-hero h1{font-size:42px}.product-card h2{font-size:22px}}