:root{
  --coral:#ff6f61;
  --teal:#0e7c7b;
  --teal-light:#e6f4f4;
  --coral-light:#fff0ee;
  --ink:#1c1c1c;
  --grey:#6b6b6b;
  --line:#e8e8e8;
  --bg:#ffffff;
  --font-body:'Archivo',sans-serif;
  --font-mono:'Space Mono',monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font-body);color:var(--ink);background:var(--bg);line-height:1.65}
img{max-width:100%;height:auto;display:block}
a{color:var(--teal)}

.progress-bar{position:fixed;top:0;left:0;height:3px;width:0;background:var(--coral);z-index:1000;transition:width .1s linear}

.site-header{position:sticky;top:0;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:14px 24px;z-index:900}
.site-header .logo img{height:34px;width:auto}
.header-nav a{font-family:var(--font-mono);font-size:13px;text-decoration:none;color:var(--ink);margin-left:20px}
.header-nav a:hover{color:var(--coral)}
.toc-toggle{display:none;font-family:var(--font-mono);font-size:13px;background:none;border:1px solid var(--line);padding:6px 12px;border-radius:6px;cursor:pointer}

.hero{position:relative}
.hero-img{width:100%;max-height:520px;object-fit:cover}
.hero-inner{max-width:860px;margin:0 auto;padding:40px 24px 10px}
.tags{margin-bottom:14px}
.tag{font-family:var(--font-mono);font-size:11px;text-transform:uppercase;letter-spacing:.08em;background:var(--teal-light);color:var(--teal);padding:4px 10px;border-radius:4px;margin-right:8px}
.hero h1{font-size:clamp(28px,4.5vw,44px);font-weight:800;line-height:1.15;margin-bottom:14px}
.meta{font-family:var(--font-mono);font-size:13px;color:var(--grey)}

.toc{max-width:860px;margin:24px auto;padding:24px;background:#fafafa;border:1px solid var(--line);border-radius:12px}
.toc-title{font-family:var(--font-mono);font-size:12px;text-transform:uppercase;letter-spacing:.1em;color:var(--grey);margin-bottom:12px}
.toc ol{columns:2;column-gap:32px;padding-left:20px;font-size:14px}
.toc li{margin-bottom:6px;break-inside:avoid}
.toc a{text-decoration:none;color:var(--ink)}
.toc a:hover{color:var(--coral)}

.article{max-width:860px;margin:0 auto;padding:0 24px 60px}
.article section{padding:44px 0;border-bottom:1px solid var(--line)}
.article section:last-of-type{border-bottom:none}
.kicker{font-family:var(--font-mono);font-size:12px;text-transform:uppercase;letter-spacing:.12em;color:var(--coral);margin-bottom:10px}
h2{font-size:clamp(24px,3.4vw,32px);font-weight:800;line-height:1.2;margin-bottom:16px}
h3{font-size:19px;font-weight:700;margin-bottom:8px}
.sub-h{font-size:24px;font-weight:800;margin-bottom:14px}
.article p{margin-bottom:14px}
.small{font-size:13px;color:var(--grey)}

figure{margin:24px 0}
figure img{border-radius:12px}
figcaption{font-family:var(--font-mono);font-size:12px;color:var(--grey);margin-top:10px}

.two-col{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:24px 0}
.three-col{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin:24px 0}

.match-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px;margin:20px 0}
.match-card{border:1px solid var(--line);border-radius:10px;padding:16px;display:flex;flex-direction:column;gap:6px;font-size:14px}
.ans-tpe{color:var(--teal);font-family:var(--font-mono)}
.ans-nr{color:var(--coral);font-family:var(--font-mono)}

.cta-box{background:var(--teal-light);border-radius:12px;padding:24px;margin-top:24px;display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}
.cta-box.big{background:var(--coral-light);align-items:flex-start}
.cta-box ul{padding-left:20px;margin:10px 0}
.btn{display:inline-block;background:var(--coral);color:#fff;font-family:var(--font-mono);font-size:14px;font-weight:700;text-decoration:none;padding:12px 22px;border-radius:8px;white-space:nowrap}
.btn:hover{background:#e75d50}
.btn.outline{background:transparent;color:var(--coral);border:2px solid var(--coral)}
.btn.outline:hover{background:var(--coral-light)}

.material-card{border-radius:12px;padding:22px}
.material-card.tpe{background:var(--teal-light)}
.material-card.nr{background:var(--coral-light)}
.mat-label{font-family:var(--font-mono);font-size:11px;text-transform:uppercase;letter-spacing:.1em;color:var(--grey);margin-bottom:8px}

.callout{border-radius:12px;padding:20px 22px;margin:24px 0}
.callout.know{background:var(--teal-light);border-left:4px solid var(--teal)}
.callout.tip{background:var(--coral-light);border-left:4px solid var(--coral)}
.callout-title{font-family:var(--font-mono);font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.1em;margin-bottom:6px}
.callout p:last-child{margin-bottom:0}

.pros-box,.cons-box,.rec-box{border:1px solid var(--line);border-radius:12px;padding:20px}
.pros-box{border-top:4px solid var(--teal)}
.cons-box{border-top:4px solid var(--coral)}
.box-title{font-family:var(--font-mono);font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.1em;margin-bottom:10px}
.pros-box ul,.cons-box ul,.rec-box ul{padding-left:20px;font-size:14px}
.pros-box li,.cons-box li,.rec-box li{margin-bottom:6px}

.table-wrap{overflow-x:auto;margin:20px 0}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{border:1px solid var(--line);padding:12px 14px;text-align:left;vertical-align:top}
th{font-family:var(--font-mono);font-size:12px;text-transform:uppercase;letter-spacing:.06em;background:#fafafa}
tbody tr:nth-child(even){background:#fcfcfc}

.flow-box{border:1px solid var(--line);border-radius:12px;padding:24px;margin:24px 0}
.flow-step{background:#fafafa;border-radius:10px;padding:18px;margin:14px 0}
.flow-q{font-weight:700;margin-bottom:10px}

blockquote{border-left:4px solid var(--coral);padding:10px 20px;margin:24px 0;font-size:18px;font-style:italic}
blockquote cite{display:block;font-family:var(--font-mono);font-size:12px;font-style:normal;color:var(--grey);margin-top:8px}

.practice-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin:20px 0}
.practice-card{border:1px solid var(--line);border-radius:12px;padding:20px}
.practice-card .emoji{font-size:26px;display:block;margin-bottom:10px}
.practice-card p{font-size:14px;margin:0}

.scenario-list{list-style:none;margin:20px 0}
.scenario-list li{padding:12px 0;border-bottom:1px dashed var(--line);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}

.usecase-box{background:#fafafa;border:1px solid var(--line);border-radius:12px;padding:24px;margin:24px 0}
.usecase-box p:last-child{margin-bottom:0}

.mistakes{display:grid;gap:14px;margin:20px 0}
.mistake{border:1px solid var(--line);border-left:4px solid var(--coral);border-radius:10px;padding:18px 20px}
.mistake p{font-size:14px;margin:0}

.faq details{border:1px solid var(--line);border-radius:10px;margin-bottom:10px;overflow:hidden}
.faq summary{cursor:pointer;font-weight:700;padding:16px 20px;list-style:none;position:relative}
.faq summary::after{content:"+";position:absolute;right:20px;font-family:var(--font-mono);color:var(--coral)}
.faq details[open] summary::after{content:"–"}
.faq details p{padding:0 20px 16px;font-size:14px;margin:0}

.product-cards{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:20px 0}
.product-card{border:1px solid var(--line);border-radius:14px;overflow:hidden;text-decoration:none;color:var(--ink);display:flex;flex-direction:column;transition:box-shadow .2s}
.product-card:hover{box-shadow:0 8px 28px rgba(0,0,0,.08)}
.product-card img{aspect-ratio:4/3;object-fit:cover;width:100%}
.product-body{padding:20px;display:flex;flex-direction:column;gap:8px}
.product-body p{font-size:14px;margin:0}
.stars{color:var(--coral);letter-spacing:2px}
.chips span{display:inline-block;font-family:var(--font-mono);font-size:11px;background:var(--teal-light);color:var(--teal);padding:3px 10px;border-radius:99px;margin:0 6px 6px 0}
.product-body .btn{margin-top:auto;align-self:flex-start}

.next-links{display:grid;gap:12px;margin:20px 0}
.next-links a{border:1px solid var(--line);border-radius:10px;padding:18px 20px;text-decoration:none;color:var(--ink);font-weight:700}
.next-links a:hover{border-color:var(--coral);color:var(--coral)}

.quiz-badge{background:#fff;border:1px solid var(--line);border-radius:14px;padding:24px;text-align:center;min-width:220px}
.quiz-badge .emoji{font-size:34px;display:block;margin-bottom:10px}
.quiz-badge .btn{margin-top:14px}

.quiz{border:1px solid var(--line);border-radius:14px;padding:20px 16px;margin-top:20px;background:#fafafa}
.quiz-progress{height:6px;background:var(--line);border-radius:99px;overflow:hidden;margin-bottom:20px}
.quiz-progress-bar{height:100%;width:12.5%;background:var(--coral);transition:width .25s}
.quiz-q-title{font-size:18px;font-weight:700;margin-bottom:16px;line-height:1.3}
.quiz-options{display:grid;gap:10px}
.quiz-opt{display:block;width:100%;text-align:left;border:2px solid var(--line);background:#fff;border-radius:10px;padding:16px;font-family:var(--font-body);font-size:16px;cursor:pointer;transition:border-color .15s,background .15s;min-height:52px}
.quiz-opt:active{border-color:var(--coral)}
.quiz-opt.selected{border-color:var(--teal);background:var(--teal-light)}
.quiz-nav{display:flex;align-items:center;justify-content:space-between;margin-top:16px}
.quiz-nav .btn{padding:10px 16px;font-size:13px;min-height:44px}
.quiz-result h3{font-size:20px;margin-bottom:10px}
.quiz-result-grid{display:grid;grid-template-columns:1fr;gap:12px;margin:16px 0}
.quiz-result-card{border:1px solid var(--line);border-radius:10px;padding:16px;background:#fff;text-align:center}
.quiz-result-card p:first-child{font-family:var(--font-mono);font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--grey);margin-bottom:6px}
.quiz-result-card p:last-child{font-weight:700;font-size:16px;margin:0}
.quiz-restart{background:none;border:none;color:var(--teal);font-family:var(--font-mono);font-size:14px;cursor:pointer;text-decoration:underline;margin-top:14px;min-height:44px}
.quiz-result .btn{width:100%;text-align:center;min-height:48px}

.cred{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;padding:32px 0!important}
.cred-item{border:1px solid var(--line);border-radius:10px;padding:16px}
.cred-item p{margin:0;font-size:14px}

.shop-cta{text-align:center}
.shop-btns{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:20px}

.site-footer{background:var(--ink);color:#eee;padding:56px 24px;text-align:center}
.footer-about{max-width:640px;margin:0 auto 24px;font-size:14px;color:#bbb}
.footer-tag{font-family:var(--font-mono);font-size:20px;font-weight:700;margin-bottom:24px}
.site-footer nav a{color:#eee;text-decoration:none;font-family:var(--font-mono);font-size:13px;margin:0 12px}
.site-footer nav a:hover{color:var(--coral)}
.socials{margin:20px 0}
.socials a{color:#bbb;font-size:13px;margin:0 10px;text-decoration:none}
.socials a:hover{color:var(--coral)}
.site-footer .small{color:#888;margin-top:12px}

.back-top{position:fixed;bottom:24px;right:24px;width:44px;height:44px;border-radius:50%;background:var(--coral);color:#fff;border:none;font-size:18px;cursor:pointer;opacity:0;pointer-events:none;transition:opacity .25s;z-index:800}
.back-top.show{opacity:1;pointer-events:auto}

@media (max-width:760px){
  .toc ol{columns:1}
  .two-col,.three-col,.product-cards{grid-template-columns:1fr}
  .toc-toggle{display:block}
  .toc{display:none}
  .toc.open{display:block}
  .header-nav{display:none}
}
@media (max-width:480px){
  .site-header{padding:12px 16px}
  .hero-inner{padding:24px 16px 6px}
  .article{padding:0 16px 40px}
  .article section{padding:32px 0}
  h2{font-size:24px}
  .match-grid,.practice-grid{grid-template-columns:1fr}
  .cta-box{flex-direction:column;align-items:stretch}
  .shop-btns{flex-direction:column}
  .shop-btns .btn{width:100%;text-align:center}
  table{font-size:13px}
  th,td{padding:8px 10px}
}