/*
  English Coach AI static site — Apple-inspired theme
  デザイン変更は、この :root の変数を差し替えるだけで全体に反映されます。
*/
:root{
  --color-primary:#0066cc;
  --color-primary-focus:#0071e3;
  --color-primary-on-dark:#2997ff;
  --color-ink:#1d1d1f;
  --color-body:#1d1d1f;
  --color-muted:#6e6e73;
  --color-muted-dark:#cccccc;
  --color-canvas:#ffffff;
  --color-canvas-alt:#f5f5f7;
  --color-surface:#fafafc;
  --color-dark:#000000;
  --color-tile-dark:#272729;
  --color-tile-dark-2:#2a2a2c;
  --color-hairline:#e0e0e0;
  --color-divider:#f0f0f0;
  --color-success:#167a3a;
  --color-warn:#b65f00;
  --font-display:"SF Pro Display", system-ui, -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;
  --font-body:"SF Pro Text", system-ui, -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;
  --container:1440px;
  --content:980px;
  --nav-height:44px;
  --subnav-height:52px;
  --section-space:80px;
  --radius-xs:5px;
  --radius-sm:8px;
  --radius-md:11px;
  --radius-lg:18px;
  --radius-pill:9999px;
  --product-shadow:rgba(0,0,0,.22) 3px 5px 30px 0;
  --press-scale:.95;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--color-body);background:var(--color-canvas-alt);font-family:var(--font-body);font-size:17px;line-height:1.47;letter-spacing:-.374px;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}
a{color:var(--color-primary);text-decoration:none}a:hover{text-decoration:underline}img{max-width:100%;height:auto;display:block}.skip-link{position:absolute;left:12px;top:-48px;background:#fff;color:var(--color-primary);z-index:999;padding:8px 14px;border-radius:var(--radius-sm)}.skip-link:focus{top:12px}.site-header{position:sticky;top:0;z-index:100;background:rgba(0,0,0,.92);color:#fff;backdrop-filter:saturate(180%) blur(20px)}.header-inner{height:var(--nav-height);max-width:var(--container);margin:0 auto;padding:0 22px;display:flex;align-items:center;gap:18px}.brand{display:inline-flex;align-items:center;gap:8px;color:inherit;text-decoration:none;white-space:nowrap;font-size:14px;font-weight:600;letter-spacing:-.12px}.brand img{width:26px;height:26px;object-fit:contain}.global-nav{display:flex;align-items:center;justify-content:center;gap:2px;flex:1}.global-nav a{display:inline-flex;align-items:center;min-height:32px;padding:0 8px;color:rgba(255,255,255,.82);font-size:12px;line-height:1;letter-spacing:-.12px;text-decoration:none}.global-nav a:hover,.global-nav a[aria-current="page"]{color:#fff;text-decoration:none}.header-cta{display:flex;align-items:center;gap:8px}.nav-toggle{position:absolute;opacity:0;pointer-events:none}.nav-button{display:none;width:44px;height:44px;align-items:center;justify-content:center;margin-left:auto;color:#fff}.nav-button span,.nav-button:before,.nav-button:after{content:"";width:18px;height:1px;background:#fff;display:block;position:absolute;transition:.2s}.nav-button:before{transform:translateY(-6px)}.nav-button:after{transform:translateY(6px)}.nav-toggle:checked + .nav-button span{opacity:0}.nav-toggle:checked + .nav-button:before{transform:rotate(45deg)}.nav-toggle:checked + .nav-button:after{transform:rotate(-45deg)}
.sub-nav{position:sticky;top:var(--nav-height);z-index:90;background:rgba(245,245,247,.82);backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid rgba(0,0,0,.08)}.sub-nav-inner{height:var(--subnav-height);max-width:var(--content);margin:0 auto;padding:0 22px;display:flex;align-items:center;justify-content:space-between;gap:16px}.sub-title{font-family:var(--font-display);font-size:21px;font-weight:600;letter-spacing:.231px}.sub-links{display:flex;gap:16px;align-items:center}.sub-links a{font-size:12px;color:var(--color-ink)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:44px;padding:0 22px;border-radius:var(--radius-pill);border:1px solid transparent;font-size:17px;line-height:1.47;font-weight:400;letter-spacing:-.374px;text-decoration:none;cursor:pointer;transition:transform .08s ease, background .15s ease, border-color .15s ease}.btn:active{transform:scale(var(--press-scale))}.btn-primary{background:var(--color-primary);color:#fff}.btn-primary:hover{background:var(--color-primary-focus);color:#fff;text-decoration:none}.btn-secondary{background:transparent;color:var(--color-primary);border-color:var(--color-primary)}.btn-secondary:hover{background:rgba(0,102,204,.06);text-decoration:none}.btn-small{min-height:32px;padding:0 13px;font-size:12px;letter-spacing:-.12px}.btn-white{background:#fff;color:var(--color-primary);border-color:#fff}.btn-dark{background:var(--color-ink);color:#fff;border-radius:var(--radius-sm);min-height:38px;padding:0 15px;font-size:14px}.link-list{display:flex;gap:16px;flex-wrap:wrap;align-items:center}.hero-actions{display:flex;flex-wrap:wrap;gap:13px;align-items:center;justify-content:center}.tile{padding:var(--section-space) 22px;background:var(--color-canvas);overflow:hidden}.tile.parchment{background:var(--color-canvas-alt)}.tile.dark{background:var(--color-tile-dark);color:#fff}.tile.dark a:not(.btn){color:var(--color-primary-on-dark)}.tile.tight{padding-top:56px;padding-bottom:56px}.container{max-width:var(--container);margin:0 auto}.content{max-width:var(--content);margin:0 auto}.center{text-align:center}.hero-split{max-width:var(--container);margin:0 auto;display:grid;grid-template-columns:minmax(0, .88fr) minmax(520px,1.12fr);gap:48px;align-items:center}.hero-copy{max-width:690px}.eyebrow{font-size:14px;line-height:1.29;letter-spacing:-.224px;color:var(--color-muted);font-weight:600;margin:0 0 12px}.dark .eyebrow{color:var(--color-muted-dark)}h1,h2,h3,p{margin-top:0}.hero-title{font-family:var(--font-display);font-size:clamp(42px,6vw,76px);font-weight:600;line-height:1.07;letter-spacing:-.03em;margin:0 0 18px}.page-title{font-family:var(--font-display);font-size:clamp(40px,5vw,64px);font-weight:600;line-height:1.07;letter-spacing:-.028em;margin:0 0 16px}.section-title{font-family:var(--font-display);font-size:clamp(34px,4vw,56px);font-weight:600;line-height:1.1;letter-spacing:-.02em;margin:0 0 14px}.section-lead{font-family:var(--font-display);font-size:clamp(21px,2.2vw,28px);font-weight:400;line-height:1.22;letter-spacing:.196px;color:#333;margin:0 auto 0;max-width:900px}.dark .section-lead{color:#f5f5f7}.body-lead{font-size:19px;line-height:1.7;color:var(--color-muted);max-width:820px}.dark .body-lead{color:var(--color-muted-dark)}.product-image{border-radius:var(--radius-lg);box-shadow:var(--product-shadow);background:#fff;overflow:hidden}.product-image img{width:100%;aspect-ratio:16/10;object-fit:cover}.teacher-cutout{max-height:620px;object-fit:contain;margin:0 auto;filter:drop-shadow(3px 5px 30px rgba(0,0,0,.18))}.mosaic{display:grid;grid-template-columns:1.2fr .8fr;gap:18px}.mosaic .product-image:nth-child(1){grid-row:span 2}.mosaic .product-image img{aspect-ratio:4/3}.grid{display:grid;gap:22px}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}.card{background:var(--color-canvas);border:1px solid var(--color-hairline);border-radius:var(--radius-lg);padding:24px;color:var(--color-ink)}.card.dark-card{background:var(--color-tile-dark-2);border-color:rgba(255,255,255,.16);color:#fff}.card h3{font-size:21px;line-height:1.19;font-weight:600;letter-spacing:.231px;margin:0 0 12px}.card p{color:var(--color-muted);margin:0}.dark-card p{color:var(--color-muted-dark)}.card-img{border-radius:var(--radius-sm);margin:-6px -6px 18px;overflow:hidden;background:#fff}.card-img img{width:100%;aspect-ratio:16/10;object-fit:cover}.metric{font-family:var(--font-display);font-size:34px;line-height:1.15;font-weight:600;letter-spacing:-.02em;margin-bottom:8px}.price{font-family:var(--font-display);font-size:34px;line-height:1.1;font-weight:600;color:var(--color-primary);margin-bottom:8px}.badge-row{display:flex;flex-wrap:wrap;gap:9px;margin-top:18px}.badge{display:inline-flex;align-items:center;min-height:34px;padding:0 13px;border-radius:var(--radius-pill);background:var(--color-canvas-alt);border:1px solid rgba(0,0,0,.08);font-size:14px;font-weight:600;color:var(--color-ink)}.dark .badge,.dark-card .badge{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.16);color:#fff}.problem-list{list-style:none;padding:0;margin:0;display:grid;gap:12px}.problem-list li{padding:16px 18px;border-radius:var(--radius-lg);background:#fff;border:1px solid var(--color-hairline);font-weight:600}.problem-list li::before{content:"✓";color:var(--color-primary);font-weight:600;margin-right:10px}.feature-matrix{border:1px solid var(--color-hairline);border-radius:var(--radius-lg);overflow:hidden;background:#fff}.matrix-row{display:grid;grid-template-columns:280px 1fr;border-bottom:1px solid var(--color-hairline)}.matrix-row:last-child{border-bottom:0}.matrix-row strong{padding:18px 20px;background:var(--color-canvas-alt);font-weight:600}.matrix-row span{padding:18px 20px;color:var(--color-muted)}.steps{counter-reset:step;display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.step{position:relative;padding:62px 20px 20px;border:1px solid var(--color-hairline);border-radius:var(--radius-lg);background:#fff}.step::before{counter-increment:step;content:counter(step);position:absolute;top:18px;left:18px;width:34px;height:34px;border-radius:50%;background:var(--color-primary);color:#fff;display:grid;place-items:center;font-weight:600}.step h3{font-size:19px;margin-bottom:8px}.video-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.video-card{border:1px solid var(--color-hairline);border-radius:var(--radius-lg);overflow:hidden;background:#fff}.video-frame{position:relative;aspect-ratio:16/9;background:#000}.video-frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0}.video-body{padding:18px}.faq{display:grid;gap:12px}.faq details{background:#fff;border:1px solid var(--color-hairline);border-radius:var(--radius-lg);padding:0;overflow:hidden}.faq summary{cursor:pointer;list-style:none;padding:18px 20px;font-weight:600}.faq summary::-webkit-details-marker{display:none}.faq summary::after{content:"+";float:right;color:var(--color-primary)}.faq details[open] summary::after{content:"−"}.faq details p{padding:0 20px 18px;margin:0;color:var(--color-muted)}.cta-panel{max-width:var(--content);margin:0 auto;padding:42px;border-radius:0;background:transparent;text-align:center}.cta-panel h2{font-family:var(--font-display);font-size:clamp(34px,4vw,56px);font-weight:600;line-height:1.1;letter-spacing:-.02em;margin-bottom:14px}.table-wrap{overflow:auto;border:1px solid var(--color-hairline);border-radius:var(--radius-lg);background:#fff}.price-table{width:100%;border-collapse:collapse;min-width:720px}.price-table th,.price-table td{padding:16px 18px;border-bottom:1px solid var(--color-hairline);text-align:left;vertical-align:top}.price-table th{font-weight:600;background:var(--color-canvas-alt)}.price-table tr:last-child td{border-bottom:0}.legal-layout{display:grid;grid-template-columns:250px minmax(0,1fr);gap:30px;align-items:start}.legal-nav{position:sticky;top:calc(var(--nav-height) + var(--subnav-height) + 18px);border:1px solid var(--color-hairline);border-radius:var(--radius-lg);background:#fff;padding:14px}.legal-nav a{display:block;padding:9px 10px;border-radius:var(--radius-sm);font-size:14px;color:var(--color-muted)}.legal-nav a:hover{background:var(--color-canvas-alt);text-decoration:none;color:var(--color-ink)}.legal-content{background:#fff;border:1px solid var(--color-hairline);border-radius:var(--radius-lg);padding:32px}.legal-content h2{font-size:24px;line-height:1.2;font-weight:600;margin:32px 0 10px}.legal-content h2:first-child{margin-top:0}.legal-content p,.legal-content li{color:#333;line-height:1.75}.form{display:grid;gap:16px}.form label{font-weight:600}.form input,.form select,.form textarea{width:100%;min-height:48px;border:1px solid var(--color-hairline);border-radius:var(--radius-md);padding:12px 14px;background:#fff;font:inherit;color:var(--color-ink)}.form textarea{min-height:160px;resize:vertical}.dummy-note{background:#fff7e8;border:1px solid #ffd79a;color:#8a5100;border-radius:var(--radius-lg);padding:16px;font-weight:600}.notice{background:var(--color-canvas-alt);border:1px solid var(--color-hairline);border-radius:var(--radius-lg);padding:18px;color:var(--color-muted)}.sns{display:flex;gap:10px;align-items:center;margin-top:22px}.sns a{display:inline-flex;width:32px;height:32px;align-items:center;justify-content:center}.sns img{width:32px;height:32px;object-fit:contain}.site-footer{background:var(--color-canvas-alt);padding:64px 22px;color:#333}.footer-inner{max-width:var(--container);margin:0 auto;display:grid;grid-template-columns:1fr 2fr;gap:42px}.footer-links{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px}.footer-links h3{font-size:14px;line-height:1.29;font-weight:600;margin:0 0 10px}.footer-links a{display:block;color:#333;font-size:12px;line-height:1.9;margin:3px 0}.copyright{font-size:12px;color:var(--color-muted);margin-top:22px}.silver-logo{max-width:300px;margin-top:22px;opacity:.9}.blog-card{display:grid;grid-template-columns:180px 1fr;gap:22px;align-items:center}.blog-card img{border-radius:var(--radius-sm);width:100%;aspect-ratio:1/1;object-fit:cover;background:#fff}.status-chip{display:inline-flex;align-items:center;gap:6px;border-radius:var(--radius-pill);background:var(--color-canvas-alt);padding:6px 10px;font-size:12px;font-weight:600;color:var(--color-muted)}
@media (max-width:1068px){:root{--section-space:64px}.global-nav{display:none}.nav-button{display:flex}.header-cta{margin-left:0}.header-inner{gap:10px}.nav-toggle:checked ~ .global-nav{display:flex;position:absolute;left:0;right:0;top:var(--nav-height);background:#000;padding:14px 22px 18px;flex-direction:column;align-items:stretch}.global-nav a{min-height:42px;font-size:17px;border-top:1px solid rgba(255,255,255,.08)}.hero-split{grid-template-columns:1fr}.hero-copy{text-align:center;margin:0 auto}.mosaic{max-width:840px;margin:0 auto}.grid-4{grid-template-columns:repeat(2,1fr)}.steps{grid-template-columns:repeat(2,1fr)}.sub-links a:not(.btn){display:none}.footer-links{grid-template-columns:repeat(2,minmax(0,1fr))}.legal-layout{grid-template-columns:1fr}.legal-nav{position:static}}
@media (max-width:735px){body{font-size:16px}.header-cta .btn-secondary{display:none}.sub-nav-inner{padding:0 16px}.tile{padding:54px 16px}.hero-title{font-size:40px}.page-title{font-size:38px}.section-title{font-size:34px}.section-lead{font-size:21px}.grid-2,.grid-3,.grid-4,.video-grid,.steps{grid-template-columns:1fr}.mosaic{grid-template-columns:1fr}.mosaic .product-image:nth-child(1){grid-row:auto}.hero-actions{justify-content:center}.matrix-row{grid-template-columns:1fr}.matrix-row strong,.matrix-row span{padding:14px 16px}.footer-inner{grid-template-columns:1fr}.blog-card{grid-template-columns:1fr}.legal-content{padding:22px}.site-footer{padding:48px 18px}.card{padding:20px}.hero-split{gap:28px}}
@media (max-width:420px){.brand span{display:none}.hero-title,.page-title{font-size:34px}.section-title{font-size:30px}.btn{width:100%;}.header-cta .btn{width:auto}.footer-links{grid-template-columns:1fr}}
@media print{.site-header,.sub-nav,.site-footer,.hero-actions,.cta-panel{display:none}.tile{padding:20px}.legal-content,.card{border:1px solid #ccc}}


/* Revisions based on 修正点.doc */
.hero-teacher-panel{
  display:flex;
  align-items:center;
  justify-content:center;
  background:#fff;
  border-radius:var(--radius-lg);
  padding:24px;
  box-shadow:var(--product-shadow);
  overflow:hidden;
}
.hero-teacher-panel .teacher-cutout{
  max-height:720px;
  width:auto;
  object-fit:contain;
}
.product-image.contain-image{
  display:flex;
  align-items:center;
  justify-content:center;
  background:#fff;
}
.product-image.contain-image img{
  aspect-ratio:auto;
  max-height:520px;
  width:auto;
  object-fit:contain;
  padding:24px;
  background:#fff;
}
.tile.dark .feature-matrix .matrix-row strong{
  color:var(--color-ink);
}
.tile.dark .feature-matrix .matrix-row span{
  color:var(--color-muted);
}

/* WordPress-backed Blog */
.blog-list{
  display:grid;
  gap:22px;
}
.blog-card{
  grid-template-columns:minmax(180px,240px) minmax(0,1fr);
  align-items:stretch;
  padding:0;
  overflow:hidden;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.blog-card:hover{
  transform:translateY(-2px);
  border-color:#c7c7cc;
  box-shadow:0 12px 30px rgba(0,0,0,.08);
}
.blog-card-media{
  min-height:220px;
  background:var(--color-canvas-alt);
  overflow:hidden;
}
.blog-card-media img{
  width:100%;
  height:100%;
  aspect-ratio:auto;
  border-radius:0;
  object-fit:cover;
}
.blog-card-media.is-fallback{
  display:grid;
  place-items:center;
  background:linear-gradient(145deg,#f5f9ff 0%,#edf4ff 55%,#f5f5f7 100%);
}
.blog-card-media.is-fallback img{
  width:84px;
  height:84px;
  object-fit:contain;
  filter:drop-shadow(0 8px 18px rgba(0,102,204,.16));
}
.blog-card-body{
  display:flex;
  flex-direction:column;
  align-items:flex-start;
  padding:26px 28px;
}
.blog-card-title{
  margin:12px 0 10px;
  font-family:var(--font-display);
  font-size:clamp(22px,2.6vw,30px);
  font-weight:600;
  line-height:1.2;
  letter-spacing:-.02em;
}
.blog-card-title a{
  color:var(--color-ink);
  text-decoration:none;
}
.blog-card-title a:hover{
  color:var(--color-primary);
  text-decoration:none;
}
.blog-card-body p{
  line-height:1.7;
}
.blog-card-more{
  margin-top:auto;
  padding-top:18px;
  font-size:15px;
  font-weight:600;
}
.blog-archive-link{
  display:flex;
  justify-content:center;
  margin-top:34px;
}

@media (max-width:735px){
  .blog-card{
    grid-template-columns:1fr;
  }
  .blog-card-media{
    min-height:0;
    aspect-ratio:16/9;
  }
  .blog-card-media.is-fallback img{
    width:76px;
    height:76px;
  }
  .blog-card-body{
    padding:22px;
  }
}

/* index.html first-view teacher PNG integration */
.hero-teacher-panel{
  display:flex;
  align-items:center;
  justify-content:center;
  background:transparent;
  border-radius:0;
  padding:0;
  box-shadow:none;
  overflow:visible;
}
.hero-teacher-panel .teacher-cutout{
  max-height:720px;
  width:auto;
  object-fit:contain;
  margin:0 auto;
  filter:drop-shadow(3px 5px 30px rgba(0,0,0,.18));
}