/* ===== MIRAI (XXBase) ===== */
:root{
  --black:#111;
  --ink:#1a1a1a;
  --text:#222;
  --muted:#666;
  --line:#d9d9d9;
  --gray:#f2f2f2;
  --gray-2:#e6e6e6;
  --mid:#5a5a5a;
  --white:#fff;
  --max:1120px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{margin:0;font-family:"Noto Sans JP","Hiragino Sans","Yu Gothic",sans-serif;color:var(--text);background:var(--white);line-height:1.85;letter-spacing:.02em;-webkit-font-smoothing:antialiased}
img,video{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3{margin:0;line-height:1.4;color:var(--ink);font-feature-settings:"palt" 1}
p{margin:0}
.container{width:min(var(--max),100% - 48px);margin-inline:auto}
.narrow{width:min(820px,100% - 48px)}
.sp{display:none}
.muted{color:var(--muted);font-size:.9em}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5em;min-height:52px;padding:.8em 1.8em;font-weight:700;font-size:.98rem;text-decoration:none;border:2px solid var(--black);transition:background .2s,color .2s;letter-spacing:.04em}
.btn-primary{background:var(--black);color:var(--white)}
.btn-primary:hover{background:#333;border-color:#333}
.btn-outline{background:var(--white);color:var(--black)}
.btn-outline:hover{background:var(--black);color:var(--white)}
.btn-invert{background:var(--white);color:var(--black);border-color:var(--white)}
.btn-invert:hover{background:transparent;color:var(--white)}
.btn-block{width:100%}
.btn::after{content:"→";font-weight:400}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line)}
.header-inner{width:min(1240px,100% - 40px);margin-inline:auto;height:68px;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:14px;text-decoration:none}
.brand-logo{width:62px;height:auto}
.brand-name{font-weight:900;font-size:1.3rem;letter-spacing:.14em;padding-left:14px;border-left:1px solid var(--line)}
.nav-toggle{position:absolute;opacity:0;pointer-events:none}
.nav-toggle-label{display:none}
.global-nav ul{list-style:none;margin:0;padding:0;display:flex;align-items:center;gap:2px}
.global-nav a{display:block;padding:.45em .8em;font-size:.88rem;font-weight:500;text-decoration:none}
.global-nav a:hover{text-decoration:underline;text-underline-offset:4px}
.global-nav a.nav-cta{background:var(--black);color:var(--white);margin-left:8px;padding:.55em 1.2em}
.global-nav a.nav-cta:hover{text-decoration:none;background:#333}

/* hero */
.hero{border-bottom:1px solid var(--line);padding:clamp(72px,10vw,128px) 0 clamp(64px,8vw,104px);position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;right:0;bottom:0;width:min(34vw,420px);height:14px;background:var(--black)}
.eyebrow{font-weight:700;color:var(--muted);letter-spacing:.12em;font-size:.92rem;margin-bottom:22px}
.hero-title{font-size:clamp(2rem,5vw,3.6rem);font-weight:900;letter-spacing:.01em;line-height:1.35}
.hero-rule{display:block;width:96px;height:6px;background:var(--black);margin:32px 0 28px}
.hero-lead{font-size:clamp(1rem,1.5vw,1.15rem);color:#333;max-width:42em}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:40px}

/* sections */
.section{padding:clamp(72px,9vw,112px) 0}
.section-gray{background:var(--gray)}
.section-dark{background:var(--black);color:#eee}
.section-dark .sec-title{color:var(--white);border-color:#fff}
.section-dark .sec-label{color:#aaa}
.sec-label{font-size:.9rem;font-weight:700;color:var(--muted);letter-spacing:.08em;margin-bottom:6px}
.sec-title{font-size:clamp(1.6rem,3vw,2.3rem);font-weight:900;padding-bottom:18px;border-bottom:2px solid var(--black);margin-bottom:40px}
.sec-lead{max-width:48em;margin:-12px 0 40px;color:#333}

/* problem */
.problem-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.problem-text p+p{margin-top:1.2em}
.problem-list-wrap{background:var(--gray);padding:28px 32px}
.problem-list-head{font-weight:700;margin-bottom:12px}
.problem-list{margin:0;padding:0;list-style:none;counter-reset:p}
.problem-list li{counter-increment:p;display:flex;gap:14px;padding:9px 0;border-bottom:1px solid var(--line);font-weight:500}
.problem-list li:last-child{border-bottom:0}
.problem-list li::before{content:counter(p,decimal-leading-zero);font-weight:700;color:var(--muted);font-size:.85rem;min-width:1.8em;padding-top:.15em}

/* skills */
.skills{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.skills li{display:grid;grid-template-columns:96px 200px 1fr;align-items:center;background:var(--white);min-height:76px}
.skill-no{align-self:stretch;display:grid;place-items:center;background:var(--mid);color:var(--white);font-weight:700;font-size:1.15rem}
.skills li:nth-child(4) .skill-no{background:var(--black)}
.skills h3{font-size:1.3rem;font-weight:900;padding:0 28px}
.skills p{padding:16px 28px 16px 0;color:#333}
.concept-ai{margin-top:56px;background:var(--white);border-left:8px solid var(--black);padding:36px 40px}
.concept-ai-head h3{font-size:1.35rem;font-weight:900;margin-bottom:8px}
.compare{display:grid;grid-template-columns:1fr 1.6fr;gap:16px;margin-top:24px}
.compare-col{padding:20px 24px;border:1px solid var(--line)}
.compare-good{border:2px solid var(--black)}
.compare-label{font-size:.82rem;font-weight:700;color:var(--muted);margin-bottom:6px}
.compare-good .compare-label{color:var(--black)}
.compare-quote{font-weight:500}
.compare-bad .compare-quote{color:var(--muted)}

/* programs */
.programs{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch}
.program{display:flex;flex-direction:column;border:1px solid var(--line);background:var(--white)}
.program-head{background:var(--black);color:var(--white);padding:22px 28px;display:flex;justify-content:space-between;align-items:baseline;gap:12px}
.program-name{font-weight:900;font-size:1.3rem;letter-spacing:.08em}
.program-target{font-size:.85rem;font-weight:500;color:#ccc}
.program-body{padding:24px 28px 8px;flex:1;font-size:.94rem}
.program-price{font-weight:900;font-size:1.6rem;color:var(--ink);line-height:1.3}
.program-price small{font-size:.8rem;font-weight:500;color:var(--muted);margin-left:4px}
.program-meta{font-size:.86rem;font-weight:700;color:var(--muted);margin:4px 0 16px;padding-bottom:14px;border-bottom:1px solid var(--line)}
.program-sub{font-size:.8rem;font-weight:700;margin-top:16px;color:var(--ink)}
.program-process{font-size:.86rem;color:#444;background:var(--gray);padding:10px 12px;margin-top:4px;line-height:1.8}
.program-note{font-size:.84rem;color:var(--muted);margin-top:12px}
.program-list{margin:14px 0 0;padding:0;list-style:none}
.program-list li{padding:6px 0 6px 18px;position:relative;border-bottom:1px dashed var(--line)}
.program-list li::before{content:"";position:absolute;left:2px;top:1.05em;width:7px;height:7px;background:var(--black)}
.program > .btn{margin:20px 28px 28px;width:auto}
.price-note{font-size:.86rem;color:var(--muted);margin-top:20px}

/* basic episodes */
.episodes{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.episode{background:var(--white);border:1px solid var(--line);display:flex;flex-direction:column}
.episode-featured{grid-column:1/-1;display:grid;grid-template-columns:1.6fr 1fr;border:2px solid var(--black)}
.episode-media{aspect-ratio:16/9;background:var(--black);position:relative}
.episode-media video{width:100%;height:100%;background:#000}
.episode-placeholder{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;background:repeating-linear-gradient(135deg,#ececec 0 12px,#e4e4e4 12px 24px);color:var(--muted);font-weight:700;letter-spacing:.1em}
.episode-placeholder span{font-size:.8rem;color:#888;font-weight:500}
.episode-gate{background:var(--gray-2)}
.episode-gate a{margin-top:8px;font-size:.85rem}
.episode-info{padding:20px 24px 24px;font-size:.92rem}
.episode-featured .episode-info{padding:32px 36px;display:flex;flex-direction:column;justify-content:center}
.episode-no{font-weight:700;font-size:.85rem;color:var(--muted);display:flex;align-items:center;gap:10px}
.episode h3{font-size:1.2rem;font-weight:900;margin:4px 0 4px}
.episode-featured h3{font-size:1.6rem}
.episode-skill{font-size:.82rem;font-weight:700;color:var(--ink);margin-bottom:10px;padding-bottom:10px;border-bottom:1px solid var(--line)}
.episode-length{margin-top:14px;font-size:.84rem;color:var(--muted);font-weight:500}
.badge{display:inline-block;font-size:.72rem;font-weight:700;padding:.15em .8em;border:1px solid #999;color:#777;letter-spacing:.06em}
.badge-live{background:var(--black);border-color:var(--black);color:var(--white)}
.basic-caution{font-size:.86rem;color:var(--muted);margin-top:20px}

/* flow */
.flow{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:0;counter-reset:f}
.flow li{position:relative;padding:28px 28px 28px;border:1px solid var(--line);border-right:0;background:var(--white);display:flex;flex-direction:column}
.flow li:last-child{border-right:1px solid var(--line);background:var(--black);color:#eee}
.flow li:last-child h3{color:var(--white)}
.flow li:not(:last-child)::after{content:"";position:absolute;right:-13px;top:50%;width:24px;height:24px;background:var(--white);border-top:1px solid var(--line);border-right:1px solid var(--line);transform:translateY(-50%) rotate(45deg);z-index:2}
.flow-step{font-size:.8rem;font-weight:700;letter-spacing:.12em;color:var(--muted)}
.flow h3{font-size:1.3rem;font-weight:900;margin:4px 0 10px}
.flow p{font-size:.92rem;flex:1}
.flow-link{margin-top:16px;font-weight:700;font-size:.9rem;text-underline-offset:4px}
.flow-link::after{content:" →"}

/* for whom */
.for-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.for-col{background:var(--white);padding:28px 32px}
.for-col h3{font-size:1.25rem;font-weight:900;display:flex;align-items:baseline;justify-content:space-between;gap:12px;padding-bottom:12px;border-bottom:2px solid var(--black);margin-bottom:8px}
.for-col h3 small{font-size:.75rem;letter-spacing:.1em;color:var(--muted)}
.check-list{list-style:none;margin:0;padding:0}
.check-list li{padding:10px 0 10px 30px;border-bottom:1px solid var(--line);position:relative}
.check-list li::before{content:"";position:absolute;left:4px;top:1.05em;width:12px;height:7px;border-left:2px solid var(--black);border-bottom:2px solid var(--black);transform:rotate(-45deg)}
.not-for{margin-top:24px;border:1px solid #bbb;padding:28px 32px;background:transparent}
.not-for h3{font-size:1.1rem;font-weight:700;margin-bottom:10px}
.not-for ul{margin:0 0 14px;padding:0;list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:4px 24px}
.not-for li{padding:6px 0 6px 22px;position:relative;color:#444}
.not-for li::before{content:"";position:absolute;left:2px;top:1.05em;width:10px;height:2px;background:#888}
.not-for p{font-size:.92rem;color:#444}

/* about */
.about-grid{display:grid;grid-template-columns:320px 1fr;gap:48px;align-items:start}
.about-logo{background:var(--gray);display:grid;place-items:center;aspect-ratio:4/3;padding:40px}
.about-logo img{width:100%;max-width:220px;height:auto}
.about-dl{margin:0 0 16px}
.about-dl div{display:grid;grid-template-columns:5em 1fr;padding:12px 0;border-bottom:1px solid var(--line)}
.about-dl dt{font-weight:700;color:var(--muted)}
.about-dl dd{margin:0;font-weight:700;font-size:1.05rem}
.about-career{margin:0 0 24px;padding:0 0 0 1.2em}
.about-career li{padding:3px 0}
.about-reason{background:var(--black);color:#eee;padding:22px 28px}
.about-reason-label{font-size:.82rem;font-weight:700;color:#aaa;margin-bottom:6px}
.about-reason strong{color:var(--white)}
.philosophy{margin:56px 0 0;padding:40px 0 0;border-top:1px solid var(--line);text-align:center}
.philosophy p{color:#444}
.philosophy-main{margin-top:14px;font-size:clamp(1.25rem,2.4vw,1.7rem);font-weight:900;color:var(--ink)!important;line-height:1.6}

/* faq */
.faq details{background:var(--white);border:1px solid var(--line);margin-bottom:10px}
.faq summary{list-style:none;cursor:pointer;padding:18px 56px 18px 24px;font-weight:700;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{content:"Q.";margin-right:10px;font-weight:900}
.faq summary::after{content:"+";position:absolute;right:24px;top:50%;transform:translateY(-50%);font-size:1.4rem;font-weight:400}
.faq details[open] summary::after{content:"−"}
.faq details p{padding:0 24px 20px 52px;color:#333}

/* contact */
.contact-placeholder{border:1px dashed #777;padding:40px;text-align:center}
.contact-status{font-size:1.3rem;font-weight:900;color:var(--white);margin-bottom:12px}
.contact-placeholder p{color:#ccc}
.contact-placeholder .btn{margin-top:28px}

/* footer */
.site-footer{background:#000;color:#bbb;padding:56px 0 28px;border-top:1px solid #333}
.footer-inner{display:flex;justify-content:space-between;gap:32px;flex-wrap:wrap;align-items:flex-start}
.footer-brand{display:flex;align-items:center;gap:18px}
.footer-brand img{width:84px;height:auto;filter:invert(1)}
.footer-brand p{font-size:.86rem;line-height:1.7}
.footer-brand strong{color:#fff;font-size:1.15rem;letter-spacing:.12em}
.footer-nav{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:6px 22px;font-size:.86rem;max-width:560px;justify-content:flex-end}
.footer-nav a{text-decoration:none}
.footer-nav a:hover{color:#fff;text-decoration:underline}
.copyright{text-align:center;margin-top:40px;font-size:.8rem;color:#888}

/* responsive */
@media (max-width:1040px){
  .nav-toggle-label{display:flex;align-items:center;justify-content:center;width:48px;height:48px;cursor:pointer;position:relative;z-index:60}
  .nav-toggle-label span,.nav-toggle-label span::before,.nav-toggle-label span::after{display:block;width:24px;height:2px;background:var(--black);position:relative;transition:transform .25s,background .25s}
  .nav-toggle-label span::before,.nav-toggle-label span::after{content:"";position:absolute;left:0}
  .nav-toggle-label span::before{top:-7px}
  .nav-toggle-label span::after{top:7px}
  .nav-toggle:checked + .nav-toggle-label span{background:transparent}
  .nav-toggle:checked + .nav-toggle-label span::before{transform:translateY(7px) rotate(45deg)}
  .nav-toggle:checked + .nav-toggle-label span::after{transform:translateY(-7px) rotate(-45deg)}
  .global-nav{position:absolute;top:68px;left:0;right:0;background:var(--white);border-bottom:1px solid var(--line);max-height:0;overflow:hidden;transition:max-height .3s}
  .nav-toggle:checked ~ .global-nav{max-height:520px}
  .global-nav ul{flex-direction:column;align-items:stretch;padding:8px 20px 20px}
  .global-nav li+li{border-top:1px solid var(--line)}
  .global-nav a{padding:.9em .4em}
  .global-nav a.nav-cta{margin:10px 0 0;text-align:center}
  .programs{grid-template-columns:1fr;max-width:640px}
  .episodes{grid-template-columns:repeat(2,1fr)}
  .episode-featured{grid-template-columns:1fr}
  .flow{grid-template-columns:1fr 1fr}
  .flow li{border-right:1px solid var(--line)}
  .flow li::after{display:none}
}
@media (max-width:720px){
  .sp{display:inline}
  .container,.narrow{width:calc(100% - 40px)}
  .header-inner{height:64px;width:calc(100% - 32px)}
  .global-nav{top:64px}
  .brand-logo{width:52px}
  .brand-name{font-size:1.15rem;padding-left:12px}
  .hero-title{font-size:1.9rem}
  .hero-cta .btn{width:100%}
  .hero::after{height:10px}
  .sec-title{font-size:1.5rem;margin-bottom:32px}
  .problem-grid{grid-template-columns:1fr;gap:32px}
  .problem-list-wrap{padding:22px 20px}
  .skills li{grid-template-columns:56px 1fr;grid-template-rows:auto auto}
  .skill-no{grid-row:1/3}
  .skills h3{padding:14px 18px 0;font-size:1.15rem}
  .skills p{padding:4px 18px 14px;font-size:.92rem}
  .concept-ai{padding:26px 22px;border-left-width:6px}
  .compare{grid-template-columns:1fr}
  .program-head,.program-body{padding-left:22px;padding-right:22px}
  .program > .btn{margin:16px 22px 22px}
  .episodes{grid-template-columns:1fr}
  .episode-featured .episode-info{padding:22px 22px 26px}
  .episode-featured h3{font-size:1.35rem}
  .flow{grid-template-columns:1fr;gap:12px}
  .flow li{padding:22px}
  .for-grid{grid-template-columns:1fr}
  .for-col,.not-for{padding:22px 20px}
  .not-for ul{grid-template-columns:1fr}
  .about-grid{grid-template-columns:1fr;gap:28px}
  .about-logo{aspect-ratio:auto;padding:36px}
  .faq summary{padding:16px 48px 16px 18px;font-size:.95rem}
  .faq details p{padding:0 18px 18px 18px}
  .contact-placeholder{padding:28px 20px}
  .footer-inner{flex-direction:column}
  .footer-nav{justify-content:flex-start}
}

/* next-step card */
.episode-next{padding:28px;background:var(--black);color:#ddd;border-color:var(--black);justify-content:center;gap:10px}
.episode-next .episode-no{color:#aaa}
.episode-next h3{color:var(--white);font-size:1.25rem}
.episode-next p{font-size:.9rem}
.episode-next .btn{margin-top:12px;background:var(--white)}
.episode-next .btn:hover{background:transparent;color:var(--white);border-color:var(--white)}
@media (max-width:720px){
  .episode.is-pending{display:grid;grid-template-columns:96px 1fr}
  .episode.is-pending .episode-media{aspect-ratio:auto;min-height:100%}
  .episode.is-pending .episode-placeholder{font-size:.72rem;letter-spacing:.04em;text-align:center;line-height:1.5;padding:6px}
  .episode.is-pending .episode-info{padding:14px 16px 16px}
  .episode.is-pending .episode-info > p:last-child{font-size:.84rem;line-height:1.7}
  .episode.is-pending h3{font-size:1.05rem}
  .episodes{gap:12px}
  .episode-next{padding:24px 22px}
}

.nw{white-space:nowrap}
.about-reason p,.philosophy p,.contact-placeholder p{text-wrap:pretty}

/* back link to XXBase */
.back-link{margin-right:auto;margin-left:20px;padding:.2em 0;font-size:.78rem;font-weight:500;color:var(--muted);text-decoration:none;white-space:nowrap;border-bottom:1px solid transparent}
.back-link:hover{color:var(--black);border-bottom-color:var(--black)}
.footer-back{text-align:center;margin-top:36px;font-size:.84rem}
.footer-back a{text-decoration:none;color:#ddd;border:1px solid #555;padding:.55em 1.4em;display:inline-block}
.footer-back a:hover{border-color:#fff;color:#fff}
.footer-back + .copyright{margin-top:24px}
@media (max-width:720px){.back-link{margin-left:12px;font-size:.72rem}}

/* XXBase sync: 動画は近日公開（mp4 は Cloudflare Pages の 25MB 制限で置けないため） */
.episode-soon img{display:block;width:100%;height:100%;object-fit:cover;filter:grayscale(1);opacity:.5}
.episode-soon__label{position:absolute;right:18px;bottom:18px;margin:0;padding:.7em 1.6em;background:var(--black,#111);color:var(--white,#fff);font-weight:700;letter-spacing:.14em;font-size:.95rem;white-space:nowrap}