@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Manrope:wght@400;500;600;700;800&display=swap');

:root{
  --bg:#f2f0e9;--paper:#fffef9;--ink:#171815;--muted:#65665f;--line:#c9c8be;
  --blue:#284bff;--orange:#ff5a30;--lime:#d9ff58;--mono:'DM Mono',monospace;--font:'Manrope',sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 var(--font);background-image:linear-gradient(#17181508 1px,transparent 1px),linear-gradient(90deg,#17181508 1px,transparent 1px);background-size:32px 32px}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
button{cursor:pointer}
.wrap{width:min(1240px,calc(100% - 64px));margin:auto}
::selection{background:var(--lime);color:var(--ink)}
.topbar{position:sticky;top:0;z-index:20;background:var(--bg);border-bottom:2px solid var(--ink)}
.navrow{display:flex;align-items:center;justify-content:space-between;gap:25px;min-height:82px}
.logo{display:flex;align-items:center;gap:12px;font-weight:800;letter-spacing:-1px;font-size:14px}
.logo-mark{display:grid;place-items:center;width:43px;height:43px;background:var(--blue);color:#fff;border:2px solid var(--ink);font:800 14px var(--mono);transform:rotate(-4deg)}
.logo small{display:block;color:var(--muted);font:9px var(--mono);letter-spacing:1.5px;text-transform:uppercase}
.nav{display:flex;align-items:center;gap:3px;flex-wrap:wrap}
.nav a{padding:8px 10px;color:var(--muted);font-size:11px;font-weight:800;text-transform:uppercase;letter-spacing:.3px;border:1px solid transparent;transition:.15s}
.nav a:hover,.nav a.active{background:var(--lime);border-color:var(--ink);color:var(--ink)}
.nav-toggle{display:none;background:var(--orange);color:var(--ink);border:2px solid var(--ink);padding:8px 11px;font-weight:800}
.hero{padding:76px 0 74px;border-bottom:2px solid var(--ink);position:relative;overflow:hidden}
.hero:before{content:'MAKE / TEST / REPEAT';position:absolute;right:-20px;top:25px;font:500 10px var(--mono);letter-spacing:3px;writing-mode:vertical-rl;color:#17181570}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:54px;align-items:center}
.kicker{display:inline-flex;align-items:center;gap:10px;color:var(--blue);font:500 11px var(--mono);letter-spacing:1px;text-transform:uppercase}
.kicker:before{content:'';width:24px;height:3px;background:var(--orange)}
h1,h2,h3,p{margin-top:0}
h1{font-size:clamp(48px,7.5vw,100px);letter-spacing:-.085em;line-height:.92;margin:24px 0 25px;font-weight:800;max-width:820px}
.hero h1 em{font-style:normal;color:var(--blue);text-decoration:underline;text-decoration-color:var(--orange);text-decoration-thickness:5px;text-underline-offset:7px}
.lead{color:#4c4d47;font-size:16px;max-width:570px}
.actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:28px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:14px 18px;border:2px solid var(--ink);background:var(--orange);color:var(--ink);font-weight:800;font-size:12px;box-shadow:4px 4px 0 var(--ink);transition:transform .15s,box-shadow .15s}
.btn:hover{transform:translate(3px,3px);box-shadow:1px 1px 0 var(--ink)}
.btn-ghost{background:var(--paper);box-shadow:none}
.btn-ghost:hover{background:var(--lime);box-shadow:none}
.hero-note{display:flex;gap:18px;flex-wrap:wrap;margin-top:30px;color:var(--muted);font:10px var(--mono);text-transform:uppercase}
.hero-note span:before{content:'↗ ';color:var(--orange);font-weight:bold}
.editor{background:var(--paper);border:2px solid var(--ink);box-shadow:12px 12px 0 var(--blue);overflow:hidden;transform:rotate(1.5deg)}
.editor-top{display:flex;align-items:center;gap:7px;padding:13px 16px;border-bottom:2px solid var(--ink);color:var(--ink);font:10px var(--mono);text-transform:uppercase}
.dot{width:11px;height:11px;border:1px solid var(--ink);border-radius:0;background:var(--orange)}
.dot:nth-child(2){background:var(--lime)}.dot:nth-child(3){background:var(--blue)}
.filename{margin-left:auto}
.editor-body{display:grid;grid-template-columns:36px 1fr;padding:25px 19px 28px;font:12px/2.1 var(--mono);color:#252721;min-height:240px}
.ln{color:#a4a49b;text-align:right;padding-right:15px;white-space:pre-line}
.code .purple{color:#6e43c7}.code .lime{color:#277a41}.code .cyan{color:var(--blue)}.code .pink{color:var(--orange)}
.editor-foot{display:flex;justify-content:space-between;padding:10px 16px;background:var(--lime);border-top:2px solid var(--ink);color:var(--ink);font:10px var(--mono)}
.pulse{font-weight:500}
.section{padding:76px 0}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:25px;margin-bottom:32px}
.section-head h2{font-size:clamp(34px,5vw,58px);letter-spacing:-.075em;line-height:.98;margin:12px 0 0;font-weight:800}
.section-head p{max-width:420px;color:var(--muted);margin:0;font-size:14px}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:2px solid var(--ink);border-left:2px solid var(--ink)}
.card{position:relative;display:flex;flex-direction:column;min-height:280px;padding:24px;background:var(--paper);border-right:2px solid var(--ink);border-bottom:2px solid var(--ink);transition:background .18s;overflow:hidden}
.card:hover{background:var(--lime);transform:none}
.card:after{content:attr(data-number);position:absolute;right:14px;top:8px;color:#17181512;font:800 80px var(--font);line-height:1}
.card-tag{font:500 10px var(--mono);color:var(--blue);letter-spacing:.8px;text-transform:uppercase}
.card h3{font-size:27px;letter-spacing:-1.5px;margin:20px 0 9px;font-weight:800}
.card p{color:var(--muted);font-size:13px;max-width:300px}
.card .card-link{margin-top:auto;padding-top:22px;color:var(--ink);font-size:11px;font-weight:800;text-transform:uppercase;letter-spacing:.3px}
.card-icon{width:43px;height:43px;display:grid;place-items:center;background:var(--blue);color:#fff;border:2px solid var(--ink);font:700 14px var(--mono);border-radius:0;transform:rotate(-3deg)}
.card:nth-child(3n+2) .card-icon{background:var(--orange);color:var(--ink);transform:rotate(3deg)}
.card:nth-child(3n) .card-icon{background:var(--lime);color:var(--ink)}
.band{margin:12px 0 78px;padding:35px;border:2px solid var(--ink);background:var(--blue);color:white;display:grid;grid-template-columns:1fr auto;gap:25px;align-items:center;box-shadow:9px 9px 0 var(--orange)}
.band h2{font-size:clamp(28px,4vw,46px);letter-spacing:-.07em;line-height:1;margin:12px 0}
.band p{color:#e2e5ff;margin:0;font-size:14px}
.band .kicker{color:var(--lime)}.band .kicker:before{background:var(--orange)}
.band .btn{background:var(--lime)}
.pagehead{padding:60px 0 40px;border-bottom:2px solid var(--ink);background:var(--paper)}
.pagehead h1{font-size:clamp(42px,6vw,78px);max-width:1000px;letter-spacing:-.08em}
.pagehead .lead{max-width:780px}
.meta{display:flex;gap:8px;flex-wrap:wrap;margin-top:24px}
.meta span{padding:6px 9px;border:1px solid var(--ink);background:var(--bg);color:var(--ink);font:10px var(--mono);text-transform:uppercase}
.content-grid{display:grid;grid-template-columns:minmax(0,760px) 270px;gap:55px;padding:45px 0 80px;align-items:start}
.prose h2{font-size:30px;letter-spacing:-1.5px;margin:40px 0 12px;font-weight:800}
.prose p,.prose li{color:#4f504a}
.prose code{font:12px var(--mono);background:var(--lime);padding:3px 5px;color:var(--ink);border:1px solid var(--ink)}
.codeblock{background:#1b1c19;color:#f7f5ed;border:2px solid var(--ink);border-left:7px solid var(--orange);padding:21px;overflow:auto;white-space:pre;font:12px/1.9 var(--mono)}
.tip{padding:20px;border:2px solid var(--ink);border-left:8px solid var(--blue);background:var(--lime);margin:25px 0}
.tip b{color:var(--ink)}.tip p{margin:7px 0 0;color:#35362f}
.side{position:sticky;top:104px;padding:22px;border:2px solid var(--ink);background:var(--paper);box-shadow:5px 5px 0 var(--orange)}
.side h3{font-size:21px;margin:16px 0 9px;letter-spacing:-.7px}
.side p{color:var(--muted);font-size:13px}
.side a{color:var(--blue);font-size:12px;font-weight:800;text-decoration:underline;text-underline-offset:3px}
.playground{padding:22px;border:2px solid var(--ink);background:var(--paper);margin:25px 0;box-shadow:5px 5px 0 var(--blue)}
.playground label{display:block;font-size:12px;font-weight:800;margin-bottom:9px}
.playground input{width:100%;padding:12px;background:var(--bg);border:2px solid var(--ink);color:var(--ink);outline:none}
.playground input:focus{border-color:var(--blue);box-shadow:3px 3px 0 var(--lime)}
.result{margin-top:14px;padding:14px;border:2px solid var(--ink);background:var(--lime);color:var(--ink);font:12px var(--mono);min-height:46px}
.quiz-options{display:grid;gap:9px;margin:16px 0}
.quiz-options button{text-align:left;padding:12px 14px;border:2px solid var(--ink);background:var(--paper);color:var(--ink);font-weight:700}
.quiz-options button:hover{background:var(--lime)}
.quiz-feedback{min-height:25px;color:var(--blue);font-size:13px;font-weight:800}
.filterbar{display:flex;gap:8px;flex-wrap:wrap;margin:20px 0 25px}
.filterbar button{padding:8px 12px;border:1px solid var(--ink);background:var(--paper);color:var(--ink);font-size:11px;font-weight:800;text-transform:uppercase}
.filterbar button.active{background:var(--blue);color:white;border-color:var(--blue)}
.project-card[hidden]{display:none}
.footer{border-top:2px solid var(--ink);padding:28px 0;background:var(--paper);color:var(--muted);font-size:11px}
.footer-inner{display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap}
.footer a{color:var(--blue);font-weight:800;text-decoration:underline;text-underline-offset:3px}
.progress-wrap{height:8px;background:#d4d2c7;border:1px solid var(--ink);overflow:hidden;margin:16px 0}
.progress-bar{height:100%;width:0;background:var(--orange);transition:width .3s}
@media(max-width:1000px){.hero-grid{grid-template-columns:1fr;gap:40px}.editor{max-width:680px}.cards{grid-template-columns:repeat(2,1fr)}.content-grid{grid-template-columns:1fr}.side{position:static}.navrow{flex-wrap:wrap;padding:13px 0}.band{grid-template-columns:1fr}.hero:before{display:none}}
@media(max-width:900px){.nav{display:none}.nav.nav-open{display:flex}.nav-toggle{display:block;margin-left:auto}.navrow{display:flex}.navrow .logo{margin-right:auto}.nav{order:3;width:100%;padding:8px 0 3px}.nav a{font-size:10px}}
@media(max-width:600px){.wrap{width:calc(100% - 30px)}.hero{padding:49px 0}.hero h1{letter-spacing:-.07em}.hero-note{gap:10px}.cards{grid-template-columns:1fr}.section{padding:48px 0}.section-head{display:block}.section-head p{margin-top:14px}.editor-body{font-size:10px;padding:15px 10px}.pagehead{padding:40px 0 28px}.pagehead h1{letter-spacing:-.07em}.content-grid{padding-top:28px}.band{padding:23px;box-shadow:5px 5px 0 var(--orange)}.nav{gap:2px}.nav a{font-size:10px;padding:7px 8px}.card{min-height:245px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important}}

/* Extended editorial lessons: same paper, ink and signal-colour design */
.expanded-guide{width:min(1240px,calc(100% - 64px));margin:54px auto 76px;padding:30px 34px;background:var(--paper);border:2px solid var(--ink);box-shadow:8px 8px 0 var(--blue)}
.expanded-guide>.kicker{display:inline-flex;margin-bottom:20px}
.expanded-guide .prose-section{max-width:820px;padding:22px 0;border-top:1px solid var(--line)}
.expanded-guide .prose-section h2{font-size:clamp(24px,3vw,34px);letter-spacing:-1.5px;margin:0 0 10px}
.expanded-guide .prose-section p{max-width:780px;margin:0;color:#4f504a}
@media(max-width:600px){.expanded-guide{width:calc(100% - 30px);padding:21px 18px;margin:35px auto 50px;box-shadow:5px 5px 0 var(--blue)}}

/* Рабочие интерактивные элементы */
.mini-quiz{margin:28px 0;padding:22px;background:var(--paper);border:2px solid var(--ink);box-shadow:5px 5px 0 var(--orange)}
.mini-quiz h2{font-size:clamp(24px,3vw,32px);letter-spacing:-1.3px;margin:12px 0 8px}
.mini-quiz p{margin-bottom:12px}.mini-quiz .quiz-options button{width:100%;transition:background .15s,transform .15s}.mini-quiz .quiz-options button:focus-visible,.small-action:focus-visible{outline:3px solid var(--blue);outline-offset:3px}
.quiz-options button.is-correct{background:var(--lime);border-color:#277a41}.quiz-options button.is-wrong{background:#ffe0d8;border-color:var(--orange)}
.quiz-hint{padding:10px 12px;background:var(--bg);border-left:4px solid var(--blue)}
.small-action{padding:9px 12px;border:2px solid var(--ink);background:var(--orange);color:var(--ink);font-size:12px;font-weight:800}.small-action:hover{background:var(--lime)}
.read-done-label{display:flex!important;gap:9px;align-items:center;cursor:pointer}.read-done-label input{width:18px;height:18px;accent-color:var(--blue)}.reading-status{font-size:12px!important;margin:10px 0 0!important;color:var(--muted)!important}.reading-status.is-done{font-weight:800;color:#277a41!important}
.timer-display{font:500 clamp(42px,8vw,64px)/1.2 var(--mono);letter-spacing:-3px;margin:15px 0}.tool-actions{display:flex;gap:8px;flex-wrap:wrap}.focus-box{box-shadow:5px 5px 0 var(--blue)}
.task-form label{display:block;font-weight:800;font-size:12px;margin-bottom:7px}.task-entry{display:flex;gap:8px}.task-entry input{min-width:0;flex:1;padding:10px;border:2px solid var(--ink);background:var(--bg)}.task-list{list-style:none;padding:0;margin:16px 0 0;display:grid;gap:8px}.task-list li{display:flex;align-items:center;gap:9px;padding:10px;border:1px solid var(--line);background:var(--bg)}.task-list li span{flex:1;overflow-wrap:anywhere}.task-list li.done span{text-decoration:line-through;color:var(--muted)}.task-list button{border:1px solid var(--ink);background:var(--paper);padding:5px 8px;font-size:11px;font-weight:800}
@media(max-width:500px){.task-entry{flex-direction:column}.task-entry .small-action{align-self:flex-start}}

.quiz-score{margin-top:4px;padding:10px 12px;border:1px dashed var(--ink);font-size:13px;font-weight:800;color:var(--ink)}
.quiz-score.is-score-correct{background:var(--lime)}
.quiz-score.is-score-wrong{background:#ffe0d8}