:root{--bg:#F4F7F9;--panel:#FFFFFF;--panel2:#E9EEF3;--line:#DCE4EC;--ink:#14213D;--muted:#46546E;--teal:#0E6E6E;--spark:#FFB000;--branch:#B7C4D3;--deep:#14213D;--deepTxt:#E8EEF6;--deepMuted:#B9C6D8;--ctaTxt:#FFFFFF}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#0F1A2E;--panel:#16233B;--panel2:#1C2B46;--line:#2A3B5A;--ink:#EAF0F8;--muted:#AAB8CC;--teal:#5FD0CF;--spark:#FFB000;--branch:#3E5274;--deep:#0A1324;--deepTxt:#EAF0F8;--deepMuted:#AAB8CC;--ctaTxt:#14213D}}
:root[data-theme=dark]{--bg:#0F1A2E;--panel:#16233B;--panel2:#1C2B46;--line:#2A3B5A;--ink:#EAF0F8;--muted:#AAB8CC;--teal:#5FD0CF;--spark:#FFB000;--branch:#3E5274;--deep:#0A1324;--deepTxt:#EAF0F8;--deepMuted:#AAB8CC;--ctaTxt:#14213D}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:18px/1.62 "Atkinson Hyperlegible",ui-sans-serif,system-ui,sans-serif}
a{color:var(--teal)}a:focus-visible,button:focus-visible,textarea:focus-visible,input:focus-visible{outline:3px solid var(--spark);outline-offset:2px}
.w{max-width:1120px;margin:0 auto;padding:0 28px}
h1,h2,h3{font-family:"Familjen Grotesk",ui-sans-serif,system-ui,sans-serif;letter-spacing:-.02em;color:var(--ink)}
h1{font-size:clamp(42px,6.4vw,70px);line-height:1;margin:0 0 18px}h1 span{display:block;color:var(--teal)}
h2{font-size:clamp(28px,3.8vw,40px);line-height:1.1;margin:0 0 12px}h3{font-size:21px;line-height:1.25;margin:0 0 6px}
p{margin:0 0 14px;color:var(--muted);max-width:68ch}
/* header */
.top{border-bottom:1px solid var(--line);background:var(--bg)}.top .w{display:flex;align-items:center;justify-content:space-between;gap:18px;padding-top:14px;padding-bottom:14px}
.mark{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font:700 19px "Familjen Grotesk",sans-serif}.mark svg{width:34px;height:22px}
.links{display:flex;gap:22px;font-size:15px}.links a{color:var(--muted);text-decoration:none}.links a:hover,.links a[aria-current]{color:var(--ink)}
/* buttons */
.cta{display:inline-block;background:var(--ink);color:var(--bg);font:700 17px "Atkinson Hyperlegible",sans-serif;padding:15px 24px;border-radius:12px;text-decoration:none;border:0;cursor:pointer}
.cta.ghost{background:transparent;color:var(--ink);border:2px solid var(--ink)}
.jiggle{animation:jg 4.5s ease-in-out 2s infinite}.jiggle:hover,.jiggle:focus-visible{animation:none}
@keyframes jg{0%,82%,100%{transform:rotate(0) scale(1)}84%{transform:rotate(-3deg) scale(1.04)}87%{transform:rotate(3deg) scale(1.04)}90%{transform:rotate(-2deg) scale(1.03)}93%{transform:rotate(2deg) scale(1.02)}96%{transform:rotate(0)}}
/* hero + tree */
.hero{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;padding:58px 0 44px}
.tree path{fill:none;stroke-linecap:round}.tree .br{stroke:var(--branch);stroke-width:3;stroke-dasharray:420;stroke-dashoffset:420;animation:grow 1.4s ease-out forwards}
.tree .lit{stroke:var(--spark);stroke-width:5;stroke-dasharray:420;stroke-dashoffset:420;animation:grow 1.6s ease-out .9s forwards;filter:drop-shadow(0 0 6px rgba(255,176,0,.6))}
.tree .dot{fill:var(--spark);opacity:0;animation:pop .4s ease-out 2.4s forwards}
@keyframes grow{to{stroke-dashoffset:0}}@keyframes pop{to{opacity:1}}
.tree .lbl{font:700 15px "Familjen Grotesk",sans-serif;fill:var(--ink)}.tree .lbl2{font:400 13px "Atkinson Hyperlegible",sans-serif;fill:var(--muted)}
/* sections */
.sec{padding:52px 0;border-top:2px solid var(--line)}
.method{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}.method h3:before{content:"";display:block;width:28px;height:4px;border-radius:2px;background:var(--spark);margin-bottom:12px}
.deep{background:var(--deep);color:var(--deepTxt);border-radius:20px;padding:32px 34px}.deep h2,.deep h3{color:var(--deepTxt)}.deep p{color:var(--deepMuted)}.deep .kicker{color:var(--spark);font-weight:700;font-size:15px}
.deep a{color:var(--spark)}
.guide{display:grid;gap:0;border-top:1px solid var(--line)}
.guide a,.guide div.row{display:grid;grid-template-columns:56px 1fr auto;gap:16px;align-items:baseline;padding:16px 4px;border-bottom:1px solid var(--line);text-decoration:none;color:var(--ink)}
.guide .n{font:700 22px "Familjen Grotesk",sans-serif;color:var(--branch)}.guide a .n{color:var(--teal)}.guide b{font:700 19px "Familjen Grotesk",sans-serif}.guide small{display:block;color:var(--muted);font-size:15px}
.guide .state{font-size:14px;color:var(--muted);white-space:nowrap}.guide a .state{color:var(--teal);font-weight:700}
.square{border:2px dashed var(--branch);border-radius:20px;padding:28px 30px}
.end{text-align:center;padding:56px 0 70px}.end h2{margin-bottom:16px}.end p{margin:0 auto 22px}
/* lesson pages */
.lesson-hero{padding:52px 0 36px}.lesson-hero .kicker{color:var(--teal);font-weight:700}
.key{border-left:5px solid var(--spark);background:var(--panel);padding:16px 20px;border-radius:0 12px 12px 0;font:700 21px/1.4 "Familjen Grotesk",sans-serif;max-width:760px}
.cols{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:22px}
.prompt{background:var(--panel2);border-radius:10px;padding:12px 14px;margin-top:10px;font-size:16px;color:var(--ink)}
.save{background:none;border:1px solid var(--line);border-radius:8px;color:var(--muted);font:14px "Atkinson Hyperlegible",sans-serif;padding:4px 10px;cursor:pointer;margin-top:8px}.save.on{color:var(--teal);border-color:var(--teal)}
.did{background:var(--deep);color:var(--deepTxt);border-radius:16px;padding:22px 26px}.did h3{color:var(--spark)}.did p{color:var(--deepMuted)}
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}.steps div{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:14px}.steps b{display:block;font-family:"Familjen Grotesk",sans-serif}.steps span{font-size:13px;color:var(--teal);font-weight:700}.steps p{font-size:15px;margin:4px 0 0}
.lab{background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:26px}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}.chips button{background:var(--bg);border:1px solid var(--line);color:var(--ink);border-radius:999px;padding:8px 14px;cursor:pointer;font:15px "Atkinson Hyperlegible",sans-serif}.chips button.on{border-color:var(--teal);color:var(--teal);font-weight:700}
label{display:block;font-weight:700;margin:14px 0 6px}textarea{width:100%;min-height:100px;resize:vertical;border:1px solid var(--line);border-radius:10px;padding:12px;background:var(--bg);color:var(--ink);font:inherit}
.out{display:none;white-space:pre-wrap;background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:14px;margin-top:14px;font-size:16px}.out.show{display:block}
.coach ul{padding-left:20px;margin:10px 0}.ok{color:var(--teal)}.miss{color:var(--muted)}
.actions{display:none;flex-wrap:wrap;gap:8px;margin-top:12px}
.check{display:flex;gap:12px;align-items:flex-start;padding:10px 0;border-bottom:1px solid var(--line)}.check input{margin-top:6px;accent-color:var(--teal);width:18px;height:18px}
.progress{height:8px;background:var(--panel2);border-radius:999px;overflow:hidden;max-width:420px;margin:10px 0 4px}.progress>div{height:100%;background:var(--spark);width:0}
.draft{background:var(--spark);color:#14213D;font-weight:700;padding:10px 14px;border-radius:10px;margin-bottom:18px}
/* footer */
.foot{border-top:1px solid var(--line);padding:28px 0 46px;color:var(--muted);font-size:15px}.foot .w{display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;align-items:center}
.avl-badge{display:inline-flex;align-items:center;gap:7px;border:1px solid var(--teal);border-radius:999px;padding:5px 12px;font:600 12px "Atkinson Hyperlegible",sans-serif;color:var(--teal);text-decoration:none}.avl-badge i{width:7px;height:7px;border-radius:50%;background:var(--spark)}
@media (max-width:820px){.hero,.method,.cols{grid-template-columns:1fr}.steps{grid-template-columns:1fr}.links{display:none}.w{padding:0 20px}.guide a,.guide div.row{grid-template-columns:40px 1fr}.guide .state{grid-column:2}}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}.tree .br,.tree .lit{stroke-dashoffset:0}.tree .dot{opacity:1}}
.private{background:var(--panel2);border-radius:10px;padding:10px 14px;font-size:15px;color:var(--ink)}
.qopts{display:grid;gap:8px;margin:10px 0}.qopts button{text-align:left;background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:12px 14px;color:var(--ink);font:16px "Atkinson Hyperlegible",sans-serif;cursor:pointer}
.qopts button.right{border-color:var(--teal);box-shadow:inset 4px 0 0 var(--teal)}.qopts button.wrong{border-color:var(--muted);opacity:.75}
.qfb{font-weight:700;color:var(--ink)}
.convo{display:grid;gap:10px;max-width:780px}.turn{border-radius:14px;padding:12px 16px}.turn b{font-family:"Familjen Grotesk",sans-serif;font-size:14px}.turn p{margin:4px 0 0;color:var(--ink)}
.turn.you{background:var(--panel);border:1px solid var(--line)}.turn.ai{background:var(--panel2);margin-left:28px}
details summary{cursor:pointer;font-weight:700;color:var(--teal);margin-top:10px}.deeper li{margin:6px 0;color:var(--muted)}
.saved-item{background:var(--panel2);border-radius:10px;padding:10px 12px;margin:8px 0;font-size:15px}
.field{width:100%;border:1px solid var(--line);border-radius:10px;padding:11px 12px;background:var(--bg);color:var(--ink);font:inherit}
dialog.copied{border:0;border-radius:18px;padding:26px 28px;max-width:520px;width:calc(100% - 32px);background:var(--panel);color:var(--ink);box-shadow:0 30px 60px -20px rgba(0,0,0,.45)}
dialog.copied::backdrop{background:rgba(10,19,36,.55)}dialog.copied h2{font-size:24px;margin:0 0 10px}dialog.copied ol{padding-left:22px;margin:0 0 12px}dialog.copied li{margin:6px 0}
dialog.copied .tip{background:var(--panel2);border-radius:10px;padding:10px 12px;font-size:15px;color:var(--ink)}dialog.copied .row{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
.capsule{font-size:20px;color:var(--ink);font-weight:700}.help{margin:10px auto 30px}
.updated{font-size:14px;color:var(--muted)}
.contact .chips label{display:inline-flex;gap:6px;align-items:center;font-weight:400;margin:0;background:var(--bg);border:1px solid var(--line);border-radius:999px;padding:7px 12px;cursor:pointer}
.contact .chips input{accent-color:var(--teal)}.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}.formmsg{font-weight:700;margin-top:10px;color:var(--ink)}
.headshot{width:160px;height:160px;border-radius:50%;object-fit:cover;display:block;margin-bottom:20px;border:3px solid var(--teal)}
.social{list-style:none;display:flex;gap:6px;padding:0;margin:4px 0 22px -10px}.social li{margin:0}.social li::marker{content:""}
.social a{position:relative;display:grid;place-items:center;width:44px;height:44px;border-radius:10px;color:var(--ink);transition:color .15s,background .15s}
.social a svg{width:24px;height:24px;fill:currentColor}
.social a:hover,.social a:focus-visible{color:var(--teal);background:var(--panel)}
.social a::after{content:attr(data-tip);position:absolute;top:calc(100% + 6px);left:50%;transform:translateX(-50%);white-space:nowrap;font-size:13px;font-weight:600;color:var(--ink);background:var(--panel);border:1px solid var(--line);padding:4px 8px;border-radius:6px;opacity:0;pointer-events:none;transition:opacity .15s;z-index:5}
.social a:hover::after,.social a:focus-visible::after{opacity:1}