/* The Code Notebook — site styles */
:root{
  --ink:#23263a; --ink-2:#4b5064; --pencil:#6b6f7e; --line:#e3e1d6;
  --paper:#fdfbf3; --paper-2:#f4f1e4; --card:#ffffff;
  --blue:#1f3f9a; --blue-soft:#e6ecfb; --red:#c2372b; --green:#2f7a45; --yellow:#ffd63c; --sticky:#fff3a8;
  --radius:14px;
  --hand:"Caveat", "Segoe Print", cursive;
  --body:"Nunito", "Segoe UI", system-ui, -apple-system, sans-serif;
  --mono:"JetBrains Mono", ui-monospace, Consolas, monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--body);font-size:17px;line-height:1.65;
  background-image:radial-gradient(circle,#d3d8e8 1.2px,transparent 1.5px);background-size:28px 28px}
a{color:var(--blue)}
img{max-width:100%;display:block}
:focus-visible{outline:3px solid var(--yellow);outline-offset:2px;border-radius:6px}
.wrap{max-width:1140px;margin:0 auto;padding-inline:20px}
h1,h2,h3{line-height:1.15;text-wrap:balance;margin:0 0 .4em}
h1{font-family:var(--hand);font-size:clamp(2.6rem,6vw,4.4rem);color:var(--blue)}
h2{font-family:var(--hand);font-size:clamp(2rem,4vw,2.8rem);color:var(--blue)}
h3{font-size:1.15rem}
.mark{background:linear-gradient(transparent 58%,var(--yellow) 58%,var(--yellow) 92%,transparent 92%);padding:0 .15em}
.hand{font-family:var(--hand)}
.muted{color:var(--pencil)}
.eyebrow{font-weight:800;font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;color:var(--red)}

/* banner shown in preview mode */
.demo-bar{background:var(--red);color:#fff;text-align:center;font-weight:700;font-size:.9rem;padding:6px 16px}
.demo-bar[hidden]{display:none}

/* header */
.site-head{position:sticky;top:0;z-index:20;background:rgba(253,251,243,.94);backdrop-filter:blur(6px);border-bottom:1px solid var(--line)}
.head-row{display:flex;align-items:center;gap:18px;min-height:66px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-family:var(--hand);font-weight:700;font-size:1.9rem;white-space:nowrap}
.brand img{width:38px;height:38px;border-radius:10px}
.nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav a{text-decoration:none;color:var(--ink);font-weight:700;padding:8px 12px;border-radius:10px}
.nav a:hover,.nav a[aria-current="page"]{background:var(--blue-soft);color:var(--blue)}
.auth-slot{display:flex;align-items:center;gap:8px}
.menu-btn{display:none;margin-left:auto;background:none;border:2px solid var(--ink);border-radius:10px;font:inherit;font-weight:800;padding:6px 12px;cursor:pointer;color:var(--ink)}
@media (max-width:860px){
  .menu-btn{display:block}
  .nav{display:none;position:absolute;left:0;right:0;top:66px;background:var(--paper);flex-direction:column;align-items:stretch;padding:12px 20px 18px;border-bottom:1px solid var(--line)}
  .nav.open{display:flex}
  .auth-slot{flex-wrap:wrap;margin-top:6px}
}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:inherit;font-weight:800;text-decoration:none;border-radius:12px;padding:10px 18px;border:2px solid var(--ink);background:var(--card);color:var(--ink);cursor:pointer;box-shadow:3px 3px 0 var(--ink);transition:transform .12s, box-shadow .12s}
.btn:hover{transform:translate(-1px,-1px);box-shadow:4px 4px 0 var(--ink)}
.btn:active{transform:translate(2px,2px);box-shadow:1px 1px 0 var(--ink)}
.btn.primary{background:var(--blue);color:#fff}
.btn.yellow{background:var(--yellow)}
.btn.red{background:var(--red);color:#fff}
.btn.small{padding:6px 12px;font-size:.9rem;box-shadow:2px 2px 0 var(--ink)}
.btn.block{width:100%}
.btn[disabled]{opacity:.6;cursor:wait}

/* hero */
.hero{padding-block:56px 40px}
.hero-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:40px;align-items:center}
.hero p.lede{font-size:1.2rem;max-width:56ch;color:var(--ink-2)}
.hero .cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
.hero-card{position:relative;background:var(--card);border:3px solid var(--ink);border-radius:22px 8px 26px 10px;padding:26px;box-shadow:8px 8px 0 var(--blue)}
.hero-card img.me{width:150px;height:150px;border-radius:50%;object-fit:cover;border:5px solid var(--yellow);margin:-70px auto 10px}
.hero-card .who{text-align:center}
.tags{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:10px}
.tag{font-size:.8rem;font-weight:800;background:var(--paper-2);border:1.5px solid var(--line);border-radius:999px;padding:3px 10px}
@media (max-width:860px){.hero-grid{grid-template-columns:1fr}.hero-card{margin-top:60px}}

/* sections / cards */
section.block{padding-block:40px}
.grid{display:grid;gap:22px}
.grid.c3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid.c2{grid-template-columns:repeat(2,minmax(0,1fr))}
@media (max-width:900px){.grid.c3{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:620px){.grid.c3,.grid.c2{grid-template-columns:minmax(0,1fr)}}
.card{background:var(--card);border:2px solid var(--ink);border-radius:18px 6px 20px 8px;padding:22px;display:flex;flex-direction:column;gap:10px}
.card h3{margin:0}
.card .foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}
.lesson-no{font-family:var(--hand);font-weight:700;font-size:1.5rem;color:var(--red)}
.sticky{background:var(--sticky);padding:18px 22px;box-shadow:4px 6px 0 rgba(0,0,0,.08);transform:rotate(-1deg)}
.done-pill{font-size:.75rem;font-weight:800;color:#fff;background:var(--green);border-radius:999px;padding:2px 10px}

/* prices */
.price{font-family:var(--hand);font-weight:700;font-size:3rem;color:var(--ink);line-height:1}
.price s{font-size:1.6rem;color:var(--pencil);margin-left:8px}
.ribbon{align-self:flex-start;font-size:.75rem;font-weight:800;background:var(--red);color:#fff;border-radius:6px;padding:2px 10px}
ul.ticks{list-style:none;margin:0;padding:0}
ul.ticks li{padding-left:28px;position:relative;margin:4px 0}
ul.ticks li::before{content:"✓";position:absolute;left:4px;color:var(--green);font-weight:900}

/* forms */
.auth-wrap{max-width:460px;margin:48px auto}
.form-card{background:var(--card);border:2px solid var(--ink);border-radius:18px 6px 20px 8px;padding:28px;box-shadow:6px 6px 0 var(--blue)}
.field{display:grid;gap:6px;margin-bottom:14px}
.field label{font-weight:800;font-size:.92rem}
.field input,.field textarea{font:inherit;padding:11px 12px;border:2px solid #c9ccd8;border-radius:10px;background:#fff;color:var(--ink);width:100%}
.field input:focus,.field textarea:focus{border-color:var(--blue);outline:none;box-shadow:0 0 0 3px var(--blue-soft)}
.field .hint{font-size:.82rem;color:var(--pencil)}
.pw-row{position:relative}
.pw-row button{position:absolute;right:8px;top:50%;transform:translateY(-50%);background:none;border:0;font:inherit;font-size:.8rem;font-weight:800;color:var(--blue);cursor:pointer}
.check{display:flex;gap:8px;align-items:flex-start;font-size:.92rem;margin-bottom:14px}
.check input{margin-top:5px}
.msg{border-radius:10px;padding:10px 12px;font-weight:700;font-size:.92rem;margin-bottom:14px}
.msg.error{background:#fde2e0;color:#8f2118}
.msg.ok{background:#e1f2e8;color:#1e5c35}
.msg[hidden]{display:none}
.or{display:flex;align-items:center;gap:10px;color:var(--pencil);font-size:.85rem;margin:14px 0}
.or::before,.or::after{content:"";flex:1;height:1px;background:var(--line)}
.strength{height:6px;border-radius:3px;background:var(--line);overflow:hidden}
.strength i{display:block;height:100%;width:0;transition:width .2s,background .2s}

/* lesson page */
.lesson-head{padding-block:34px 10px}
.video{position:relative;aspect-ratio:16/9;max-width:100%;border:3px solid var(--ink);border-radius:16px;overflow:hidden;background:#11131c;box-shadow:6px 6px 0 var(--blue)}
.video iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.video .placeholder{position:absolute;inset:0;display:grid;place-items:center;text-align:center;color:#fff;padding:20px}
.notes{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:36px;align-items:start}
@media (max-width:900px){.notes{grid-template-columns:minmax(0,1fr)}}
.notes article h2{margin-top:1.2em}
.notes article p{max-width:70ch}
aside.toc{position:sticky;top:86px;background:var(--card);border:2px solid var(--ink);border-radius:14px;padding:16px 18px}
aside.toc a{display:block;text-decoration:none;color:var(--ink);padding:3px 0;font-weight:600}
aside.toc a:hover{color:var(--blue)}
pre.code{background:#171a26;color:#e6e8ef;border-radius:12px;padding:16px 18px;overflow-x:auto;font-family:var(--mono);font-size:.88rem;line-height:1.55}
pre.code .k{color:#9cb2ff} pre.code .c{color:#8a91a8;font-style:italic} pre.code .s{color:#f2c879} pre.code .n{color:#f4a392}
.tip{background:#ffe3ea;border-radius:12px;padding:14px 16px;font-weight:600}
.table-wrap{overflow-x:auto}
table.nice{border-collapse:collapse;width:100%;background:#fff;border:2px solid var(--ink);border-radius:12px;overflow:hidden}
table.nice th,table.nice td{padding:9px 12px;border-bottom:1px solid var(--line);text-align:left}
table.nice th{background:var(--blue-soft)}
.lvl{font-weight:800;font-size:.8rem;border-radius:6px;padding:1px 8px}
.lvl.E{background:#e1f2e8;color:#1e7a4b}.lvl.M{background:#faedd6;color:#955800}.lvl.H{background:#fbe3e1;color:#b42a22}

/* dashboard */
.dash-grid{display:grid;grid-template-columns:320px minmax(0,1fr);gap:26px;align-items:start}
@media (max-width:860px){.dash-grid{grid-template-columns:minmax(0,1fr)}}
.avatar{width:84px;height:84px;border-radius:50%;background:var(--blue);color:#fff;display:grid;place-items:center;font-family:var(--hand);font-size:2.6rem;font-weight:700;border:4px solid var(--yellow)}
.progress{height:12px;background:var(--paper-2);border:2px solid var(--ink);border-radius:8px;overflow:hidden}
.progress i{display:block;height:100%;background:linear-gradient(90deg,var(--yellow),#f2a93b);width:0;transition:width .3s}
.lesson-row{display:flex;align-items:center;gap:12px;padding:10px 0;border-bottom:1px dashed var(--line)}
.lesson-row:last-child{border-bottom:0}
.lesson-row input{width:20px;height:20px}
.lesson-row a{margin-left:auto}

/* footer */
.site-foot{margin-top:60px;border-top:2px solid var(--ink);background:var(--paper-2);padding-block:30px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:24px}
@media (max-width:760px){.foot-grid{grid-template-columns:1fr}}
.site-foot a{display:block;text-decoration:none;color:var(--ink-2);padding:2px 0}
.site-foot a:hover{color:var(--blue)}
.legal{margin-top:20px;font-size:.85rem;color:var(--pencil)}
.page{padding-block:34px}
.prose{max-width:760px}
.prose h2{margin-top:1.4em}

/* small-screen header fixes */
.brand{min-width:0;overflow:hidden;text-overflow:ellipsis}
@media (max-width:480px){.brand{font-size:1.45rem}.brand img{width:32px;height:32px}.menu-btn{padding:5px 10px}}
[hidden]{display:none!important}