:root{
  --ink:#111827;
  --paper:#fffdf6;
  --paper-2:#fff7da;
  --night:#0b0f1a;
  --panel:#151d2e;
  --line:#243651;
  --cyan:#00e5ff;
  --teal:#00b8b8;
  --coral:#ff5d73;
  --yellow:#ffd84d;
  --white:#fff;
  --muted:#91a0b5;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--night);color:#e6edf5;font-family:"Noto Sans JP",sans-serif;line-height:1.85}
a{color:inherit}
.site-header{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:64px;padding:10px max(20px,calc((100vw - 1120px)/2));background:rgba(11,15,26,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}
.site-logo{text-decoration:none;font:900 24px/1 "Barlow Condensed",sans-serif;letter-spacing:.05em;color:#fff}.site-logo span{color:var(--cyan)}
.site-nav{display:flex;gap:8px;align-items:center}.site-nav a{padding:8px 13px;border:1px solid var(--line);border-radius:999px;color:#aebbd0;text-decoration:none;font-size:13px;font-weight:700}.site-nav a:hover,.site-nav a[aria-current="page"]{color:var(--night);background:var(--cyan);border-color:var(--cyan)}
.manga-shell{width:min(1120px,calc(100% - 32px));margin:0 auto;padding:42px 0 88px}
.crumbs{margin-bottom:26px;color:var(--muted);font-size:13px}.crumbs a{text-decoration:none}.crumbs a:hover{color:var(--cyan)}
.series-hero{position:relative;overflow:hidden;display:grid;grid-template-columns:minmax(0,1.05fr) minmax(300px,.95fr);gap:34px;align-items:center;padding:44px;border:1px solid rgba(0,229,255,.28);border-radius:28px;background:radial-gradient(circle at 90% 5%,rgba(0,229,255,.16),transparent 35%),linear-gradient(145deg,#111b2e,#0d1321);box-shadow:0 28px 80px rgba(0,0,0,.28)}
.series-hero::after{content:"MANGA";position:absolute;right:-18px;bottom:-42px;color:rgba(255,255,255,.035);font:900 150px/1 "Barlow Condensed",sans-serif;letter-spacing:-.05em;pointer-events:none}
.eyebrow{margin:0 0 12px;color:var(--cyan);font:800 13px/1.3 "Barlow Condensed",sans-serif;letter-spacing:.22em}
h1,h2,h3{margin-top:0;line-height:1.35}
h1{margin-bottom:18px;font-size:clamp(35px,6vw,66px);letter-spacing:-.04em;color:#fff}
h1 em{display:block;color:var(--yellow);font-style:normal}
.hero-copy{max-width:650px;margin:0;color:#b6c2d2;font-size:17px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.primary-link,.ghost-link{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:11px 22px;border-radius:10px;text-decoration:none;font-weight:900}
.primary-link{background:var(--cyan);color:var(--night);box-shadow:0 8px 24px rgba(0,229,255,.18)}.primary-link:hover{background:#4aedff;transform:translateY(-1px)}
.ghost-link{border:1px solid var(--line);color:#fff}.ghost-link:hover{border-color:var(--cyan);color:var(--cyan)}
.hero-art{position:relative;z-index:1;margin:0;border:3px solid #fff;border-radius:16px;overflow:hidden;background:#07152c;transform:rotate(1deg);box-shadow:9px 10px 0 var(--coral)}
.hero-art img{display:block;width:100%;height:auto;aspect-ratio:3/2;object-fit:cover}.hero-art figcaption{padding:8px 12px;background:#fff;color:#344054;font-size:12px}
.quick-promise{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:18px 0 0;padding:0;list-style:none}.quick-promise li{padding:13px 14px;border:1px solid var(--line);border-radius:10px;background:rgba(255,255,255,.035);color:#c4cede;font-size:13px}.quick-promise strong{display:block;color:var(--cyan);font-size:17px}
.section{margin-top:72px}.section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:22px}.section h2{margin-bottom:8px;color:#fff;font-size:clamp(27px,4vw,40px)}.section-intro{max-width:620px;margin:0;color:var(--muted);font-size:15px}
.episode-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.episode-card{position:relative;display:flex;flex-direction:column;overflow:hidden;border:2px solid #111;border-radius:18px;background:var(--paper);color:var(--ink);text-decoration:none;box-shadow:7px 8px 0 rgba(0,229,255,.22);transition:.2s}.episode-card:hover{transform:translateY(-5px) rotate(-.35deg);box-shadow:10px 12px 0 rgba(255,93,115,.45)}
.episode-thumb{position:relative;display:grid;place-items:center;min-height:190px;padding:24px;background:linear-gradient(135deg,#0a1930,#102944);border-bottom:3px solid #111}.episode-thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.72}.episode-thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 20%,rgba(3,10,22,.8))}
.episode-no,.episode-hook{position:relative;z-index:1}.episode-no{align-self:start;justify-self:start;padding:6px 10px;border:2px solid #111;background:var(--yellow);color:#111;font:900 14px/1 "Barlow Condensed",sans-serif;transform:rotate(-2deg)}.episode-hook{align-self:end;justify-self:start;margin:56px 0 0;color:#fff;font-size:22px;font-weight:900;line-height:1.35;text-shadow:0 2px 8px #000}
.episode-card-body{display:flex;flex:1;flex-direction:column;padding:22px}.episode-card h3{margin-bottom:8px;font-size:22px}.episode-card p{margin:0 0 18px;color:#526071;font-size:15px}.episode-link{margin-top:auto;color:#005e68;font-weight:900}
.roadmap{display:grid;grid-template-columns:repeat(3,1fr);gap:0;padding:0;list-style:none;counter-reset:road}.roadmap li{position:relative;padding:24px 24px 24px 64px;border:1px solid var(--line);background:var(--panel);color:#b9c5d5;font-size:15px}.roadmap li:first-child{border-radius:14px 0 0 14px}.roadmap li:last-child{border-radius:0 14px 14px 0}.roadmap li::before{counter-increment:road;content:counter(road);position:absolute;left:20px;top:22px;display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--cyan);color:var(--night);font-weight:900}.roadmap strong{display:block;margin-bottom:5px;color:#fff;font-size:17px}
.editor-note{padding:26px;border-left:5px solid var(--yellow);border-radius:0 14px 14px 0;background:#151d2e}.editor-note h2{font-size:22px}.editor-note p{margin:8px 0;color:#b8c5d6}.editor-note a{color:var(--cyan)}

/* episode pages */
.episode-hero{display:grid;grid-template-columns:1fr auto;gap:28px;align-items:end;padding-bottom:28px;border-bottom:1px solid var(--line)}
.episode-hero h1{max-width:820px;margin-bottom:14px;font-size:clamp(34px,6vw,60px)}
.episode-deck{max-width:720px;margin:0;color:#b8c5d7;font-size:17px}.episode-chip{padding:12px 16px;border:2px solid #111;background:var(--yellow);color:#111;font-weight:900;transform:rotate(2deg);box-shadow:5px 5px 0 var(--coral)}
.comic{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:34px}
.comic--art{align-items:start}
.comic-panel-art{position:relative;margin:0;border-radius:14px;background:#fffdf6;color:var(--ink);box-shadow:6px 7px 0 rgba(0,229,255,.2);overflow:hidden}
.comic-frame{position:relative;aspect-ratio:3/2;overflow:hidden;border:4px solid #101828;background:#fff}
.comic-sheet{position:absolute;display:block;width:200%;height:200%;max-width:none;object-fit:fill}
.comic-frame--1 .comic-sheet{left:0;top:0}
.comic-frame--2 .comic-sheet{left:-100%;top:0}
.comic-frame--3 .comic-sheet{left:0;top:-100%}
.comic-frame--4 .comic-sheet{left:-100%;top:-100%}
.comic-panel-art .panel-no{z-index:3;top:auto;right:10px;bottom:8px;padding:4px 7px;border:2px solid #111;background:var(--yellow);font-size:13px;opacity:1;transform:rotate(-2deg)}
.comic-talk{position:absolute;z-index:2;left:3.5%;top:4%;display:grid;place-items:center;width:40%;min-height:31%;margin:0;padding:4px;color:#111;text-align:center;font-size:clamp(11px,1.4vw,17px);font-weight:900;line-height:1.45;letter-spacing:-.02em;opacity:0;pointer-events:none}
.comic-talk.wide{width:52%}.comic-talk.narrow{width:33%}
.comic-panel-art figcaption{min-height:72px;padding:12px 16px;border:3px solid #101828;border-top:0;background:#fffdf6;line-height:1.55}
.comic-panel-art figcaption strong{display:block;font-size:15px}.comic-panel-art figcaption span{display:block;color:#667085;font-size:12px}
.comic-panel{position:relative;min-height:300px;padding:26px;border:4px solid #101828;border-radius:14px;background:var(--paper);color:var(--ink);box-shadow:6px 7px 0 rgba(0,229,255,.2);overflow:hidden}.comic-panel:nth-child(2n){background:var(--paper-2)}
.panel-no{position:absolute;top:12px;right:14px;color:#111;font:900 54px/1 "Barlow Condensed",sans-serif;opacity:.12}.scene{display:flex;align-items:center;gap:14px;margin-bottom:22px}.avatar{display:grid;place-items:center;flex:0 0 70px;width:70px;height:70px;border:3px solid #111;border-radius:50%;background:var(--coral);color:#fff;font-size:15px;font-weight:900}.avatar.guide{background:var(--teal)}
.scene strong{display:block;font-size:18px}.scene span{color:#687386;font-size:13px}.bubble{position:relative;margin:0 12px 16px 0;padding:18px 20px;border:3px solid #111;border-radius:20px;background:#fff;font-size:17px;font-weight:700;line-height:1.75}.bubble::after{content:"";position:absolute;left:28px;bottom:-13px;width:20px;height:20px;background:#fff;border-right:3px solid #111;border-bottom:3px solid #111;transform:rotate(45deg)}.bubble.guide{margin-left:34px;background:#e6fbfb}.bubble.guide::after{left:auto;right:28px;background:#e6fbfb}.sfx{margin:16px 0 0;color:var(--coral);font-size:28px;font-weight:900;transform:rotate(-2deg)}
.panel-data{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:18px}.panel-data div{padding:12px 8px;border:2px solid #111;border-radius:10px;background:#fff;text-align:center}.panel-data b{display:block;color:#007a86;font-size:22px}.panel-data span{font-size:12px;color:#586579}
.lesson{margin-top:58px;padding:34px;border:1px solid var(--line);border-radius:20px;background:linear-gradient(145deg,#141d30,#101827)}.lesson h2{font-size:30px}.lesson-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.lesson-card{padding:22px;border:1px solid #2b3b55;border-radius:12px;background:#0d1422}.lesson-card b{display:block;margin-bottom:7px;color:var(--cyan);font-size:18px}.lesson-card p{margin:0;color:#b3c0d1;font-size:15px}
.number-example{margin-top:22px;padding:22px;border:2px dashed rgba(0,229,255,.55);border-radius:12px;background:rgba(0,229,255,.05)}.number-example h3{margin-bottom:8px;color:#fff}.number-example p{margin:0;color:#c4cfdd}.number-example strong{color:var(--yellow)}
.data-links{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:18px}.data-link{padding:20px;border:1px solid var(--line);border-radius:12px;background:var(--panel);text-decoration:none}.data-link:hover{border-color:var(--cyan)}.data-link b{display:block;color:#fff;font-size:17px}.data-link span{color:var(--muted);font-size:14px}.data-link i{float:right;color:var(--cyan);font-style:normal}
.episode-nav{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:60px}.episode-nav a{padding:18px;border:1px solid var(--line);border-radius:12px;text-decoration:none;color:#c3cfdd}.episode-nav a:last-child{text-align:right}.episode-nav a:hover{border-color:var(--cyan);color:#fff}.episode-nav small{display:block;color:var(--cyan);font-size:12px;font-weight:800;letter-spacing:.08em}
.risk-note{margin-top:28px;padding:20px;border:1px solid rgba(255,93,115,.45);border-radius:12px;background:rgba(255,93,115,.08);color:#d7dee9;font-size:14px}.risk-note a{color:var(--cyan);font-weight:700}
.site-footer{padding:34px 20px;border-top:1px solid var(--line);text-align:center;color:var(--muted);font-size:12px}.site-footer a{color:#b7c3d4}.site-footer p{margin:6px 0}
@media(max-width:850px){.series-hero{grid-template-columns:1fr;padding:30px}.episode-grid,.lesson-grid{grid-template-columns:1fr}.roadmap{grid-template-columns:1fr}.roadmap li:first-child{border-radius:14px 14px 0 0}.roadmap li:last-child{border-radius:0 0 14px 14px}.comic{grid-template-columns:1fr}.comic-talk{font-size:clamp(12px,3.1vw,18px)}.episode-hero{grid-template-columns:1fr}.episode-chip{justify-self:start}.site-nav a:not([aria-current="page"]){display:none}}
@media(max-width:560px){.manga-shell{width:min(100% - 22px,1120px);padding-top:25px}.series-hero{padding:24px;border-radius:18px}.series-hero::after{font-size:92px}.hero-art{box-shadow:5px 6px 0 var(--coral)}.quick-promise{grid-template-columns:1fr}.section{margin-top:52px}.section-head{display:block}.comic-panel{min-height:0;padding:20px}.bubble{margin-right:0;font-size:16px}.bubble.guide{margin-left:16px}.panel-data{grid-template-columns:1fr 1fr}.lesson{padding:24px 18px}.data-links,.episode-nav{grid-template-columns:1fr}.episode-nav a:last-child{text-align:left}.site-header{padding:12px 14px}.site-logo{font-size:20px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}