.classes-page{background:#fff;color:#3e566b}
.classes-hero{position:relative;overflow:hidden;background:linear-gradient(135deg,#eef8ff 0%,#fbfdff 55%,#eef8f4 100%);border-bottom:1px solid #dbe8f1}
.classes-hero:after{content:"";position:absolute;right:-120px;top:-160px;width:460px;height:460px;border-radius:50%;background:radial-gradient(circle,rgba(24,136,198,.16),transparent 68%)}
.classes-hero-inner{position:relative;z-index:1;padding:66px 0 60px}
.classes-eyebrow,.classes-section-head>p{margin:0 0 9px;color:#1584bd;font-size:12px;font-weight:900;letter-spacing:.17em}
.classes-hero h1{margin:0;color:#123e69;font-size:clamp(38px,5vw,62px);letter-spacing:-.045em}
.classes-lead{margin:20px 0 0;color:#3d607b;font-size:18px;font-weight:700;line-height:1.9}

.classes-year-section{padding:54px 0 36px;background:#fbfdff}
.classes-section-head{text-align:center}
.classes-section-head h2{margin:0;color:#153f68;font-size:clamp(28px,3.5vw,42px);letter-spacing:-.035em}
.classes-section-head span{display:block;margin-top:12px;font-size:14px;color:#5c7488}
.year-tabs{display:grid;grid-template-columns:repeat(5,1fr);gap:12px;margin:30px auto 0;max-width:980px}
.year-tabs button{height:46px;border:0;border-radius:999px;background:#eef3f7;color:#708295;font-weight:850}
.year-tabs button.active{background:linear-gradient(135deg,#0d65c2,#1389d0);color:#fff;box-shadow:0 8px 20px rgba(19,105,186,.18)}
.year-tabs button:disabled{opacity:.75}
.subject-buttons{display:flex;justify-content:center;gap:14px;margin-top:28px}
.subject-buttons a{min-width:190px;padding:13px 24px;border:2px solid #176dc3;border-radius:10px;color:#176dc3;background:#fff;text-align:center;text-decoration:none;font-weight:900}
.subject-buttons a+ a{border-color:#16834d;color:#16834d}
.subject-buttons a:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(31,91,143,.10)}

.class-details{padding:22px 0 90px;background:#fff}
.class-card{display:grid;grid-template-columns:.9fr 1.1fr;gap:34px;margin-top:26px;padding:30px;border-radius:22px;border:1px solid #d7e6f2;box-shadow:0 14px 38px rgba(31,73,110,.08);scroll-margin-top:24px}
.class-card-blue{background:linear-gradient(135deg,#f8fcff,#fff)}
.class-card-green{background:linear-gradient(135deg,#f7fdf8,#fff);border-color:#d8eadf}
.class-number{width:48px;height:48px;display:grid;place-items:center;border-radius:50%;background:#116fcb;color:#fff;font-weight:950;font-size:17px}
.class-card-green .class-number{background:#17834e}
.class-meta{margin:12px 0 2px;color:#668196;font-size:11px;font-weight:900;letter-spacing:.08em}
.class-card h2{margin:0;color:#174b78;font-size:32px;letter-spacing:-.03em}
.class-card-green h2{color:#176f48}
.class-catch{margin:12px 0 10px;color:#1769b3;font-size:17px;font-weight:900}
.class-card-green .class-catch{color:#16804d}
.class-card-copy>p:not(.class-meta):not(.class-catch){margin:0;color:#4a6378;font-size:14px;line-height:1.9}
.learning-points{margin-top:20px;padding:17px 18px;border-radius:14px;background:#edf7ff}
.class-card-green .learning-points{background:#edf9f1}
.learning-points strong{color:#214a6b;font-size:13px}
.learning-points ul{margin:10px 0 0;padding-left:1.25em}
.learning-points li{margin:5px 0;font-size:12px;line-height:1.55}
.class-gallery{display:grid;grid-template-columns:1fr 1fr;gap:14px;align-content:center}
.class-gallery figure{margin:0}
.class-gallery img{display:block;width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:14px}
.class-gallery figcaption{margin-top:7px;text-align:center;color:#526b7f;font-size:11px;font-weight:800}
.classes-dummy-note{margin:22px 0 0;color:#7c8d9b;font-size:11px;text-align:center}

@media(max-width:900px){
  .class-card{grid-template-columns:1fr}
}
@media(max-width:700px){
  .classes-hero-inner{padding:46px 0}
  .classes-lead br{display:none}
  .year-tabs{grid-template-columns:repeat(2,1fr)}
  .subject-buttons{flex-direction:column;align-items:stretch}
  .subject-buttons a{min-width:0}
  .class-card{padding:22px 18px}
}
@media(max-width:520px){
  .class-gallery{grid-template-columns:1fr}
}

/* v2: 1st + 2nd year course demo */
.year-tabs a{
  height:46px;
  display:flex;
  align-items:center;
  justify-content:center;
  border-radius:999px;
  background:#eef3f7;
  color:#708295;
  font-weight:850;
  text-decoration:none;
}
.year-tabs a.active{
  background:linear-gradient(135deg,#0d65c2,#1389d0);
  color:#fff;
  box-shadow:0 8px 20px rgba(19,105,186,.18)
}
.year-subject-block{
  margin-top:28px;
  padding:22px;
  border-radius:18px;
  background:linear-gradient(135deg,#f4f9ff,#fbfdff);
  border:1px solid #dce9f4
}
.year-subject-block-2{
  background:linear-gradient(135deg,#f3fbf7,#fbfefc);
  border-color:#dcece2
}
.year-subject-head{
  display:flex;
  align-items:baseline;
  gap:14px;
  margin-bottom:16px
}
.year-subject-head b{
  color:#174f83;
  font-size:22px
}
.year-subject-block-2 .year-subject-head b{color:#17724c}
.year-subject-head span{
  color:#668096;
  font-size:12px;
  font-weight:750
}
.subject-buttons-2{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:10px
}
.subject-buttons-2 a{
  min-width:0;
  border-color:#2c9360!important;
  color:#23764e!important
}
.classes-year-divider{
  margin:58px 0 8px;
  padding-top:36px;
  border-top:1px solid #dfe9f1;
  text-align:center
}
.classes-year-divider p{
  margin:0 0 7px;
  color:#178f64;
  font-size:11px;
  font-weight:900;
  letter-spacing:.18em
}
.classes-year-divider h2{
  margin:0;
  color:#17476e;
  font-size:34px
}
.classes-year-divider span{
  display:block;
  margin-top:9px;
  color:#678092;
  font-size:13px
}
.class-card-teal{
  background:linear-gradient(135deg,#f5fcfb,#fff);
  border-color:#d7ebe7
}
.class-card-teal .class-number{background:#188a78}
.class-card-teal h2,.class-card-teal .class-catch{color:#187666}
.class-card-teal .learning-points{background:#edf9f6}
.class-card-ai{
  background:linear-gradient(135deg,#f7f5ff,#fff);
  border-color:#e2dcf3
}
.class-card-ai .class-number{background:#6247b8}
.class-card-ai h2,.class-card-ai .class-catch{color:#5941a3}
.class-card-ai .learning-points{background:#f1effb}
@media(max-width:900px){
  .subject-buttons-2{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:700px){
  .year-subject-head{display:block}
  .year-subject-head span{display:block;margin-top:5px}
}
@media(max-width:520px){
  .subject-buttons-2{grid-template-columns:1fr}
}

/* v3: subject details open only when a subject is selected */
.subject-buttons .subject-toggle{
  min-width:190px;
  padding:13px 24px;
  border:2px solid #176dc3;
  border-radius:10px;
  color:#176dc3;
  background:#fff;
  text-align:center;
  font:inherit;
  font-weight:900;
  cursor:pointer;
  transition:.18s ease;
}
.subject-buttons .subject-toggle:hover,
.subject-buttons .subject-toggle.is-open{
  transform:translateY(-2px);
  box-shadow:0 8px 20px rgba(31,91,143,.10);
  background:#edf7ff;
}
.year-subject-block-2 .subject-toggle{
  border-color:#2c9360;
  color:#23764e;
}
.year-subject-block-2 .subject-toggle:hover,
.year-subject-block-2 .subject-toggle.is-open{
  background:#edf9f2;
}
.subject-buttons-2 .subject-toggle{min-width:0}
.class-card-collapsible[hidden]{display:none!important}
.classes-open-guide{
  margin:10px 0 2px;
  padding:13px 16px;
  border-radius:12px;
  background:#f4f8fb;
  color:#607b91;
  font-size:12px;
  font-weight:750;
  text-align:center;
}
.class-card-collapsible{
  animation:classOpen .24s ease both;
  scroll-margin-top:24px;
}
@keyframes classOpen{
  from{opacity:0;transform:translateY(-8px)}
  to{opacity:1;transform:translateY(0)}
}
@media(max-width:700px){
  .subject-buttons .subject-toggle{width:100%;min-width:0}
}

/* v4: anchored speech-balloon course details */
.balloon-detail-section{
  padding:10px 0 70px;
}
.class-balloon{
  position:absolute;
  z-index:1000;
  width:min(920px,calc(100vw - 32px));
  padding:18px;
  border:1px solid #cfdfea;
  border-radius:22px;
  background:#fff;
  box-shadow:0 22px 60px rgba(26,68,105,.20);
}
.class-balloon[hidden]{display:none!important}
.class-balloon-arrow{
  position:absolute;
  top:-10px;
  width:20px;
  height:20px;
  background:#fff;
  border-left:1px solid #cfdfea;
  border-top:1px solid #cfdfea;
  transform:translateX(-50%) rotate(45deg);
}
.class-balloon-close{
  position:absolute;
  right:12px;
  top:10px;
  z-index:2;
  width:34px;
  height:34px;
  border:0;
  border-radius:50%;
  background:#eef4f8;
  color:#3d5c74;
  font-size:22px;
  line-height:1;
  cursor:pointer;
}
.class-balloon-close:hover{background:#e2edf4}
.class-balloon-content .class-card{
  margin:0;
  box-shadow:none;
  border:0;
  background:transparent;
}
.class-balloon-content .class-card-collapsible{
  animation:balloonOpen .2s ease both;
}
@keyframes balloonOpen{
  from{opacity:0;transform:scale(.985) translateY(-5px)}
  to{opacity:1;transform:scale(1) translateY(0)}
}
.subject-toggle.is-open{
  position:relative;
  z-index:2;
}
@media(max-width:700px){
  .class-balloon{
    padding:14px;
    border-radius:18px;
  }
  .class-balloon-content .class-card{
    grid-template-columns:1fr;
    padding:16px 8px 8px;
  }
  .class-balloon-close{
    right:8px;
    top:8px;
  }
}

/* v5 balloon bugfix */
.class-balloon{box-sizing:border-box}
.class-balloon-content{position:relative}
.class-balloon-content .class-card-collapsible[hidden]{display:none!important}

/* v6: complete Years 1–5 course list */
.year-tabs{grid-template-columns:repeat(5,1fr)}
.year-tabs a{scroll-behavior:smooth}
.year-subject-block{scroll-margin-top:24px}
.year-subject-block-3{background:linear-gradient(135deg,#f8f6ff,#fdfcff);border-color:#e5def4}
.year-subject-block-4{background:linear-gradient(135deg,#fffaf2,#fffdf9);border-color:#eee2cf}
.year-subject-block-5{background:linear-gradient(135deg,#fff7f7,#fffdfd);border-color:#efdddd}
.year-subject-block-3 .year-subject-head b{color:#6550a7}
.year-subject-block-4 .year-subject-head b{color:#a66a1e}
.year-subject-block-5 .year-subject-head b{color:#a64b55}
.subject-list-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:9px;
}
.subject-list-grid span{
  display:flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  padding:9px 10px;
  border:1px solid #dbe5ed;
  border-radius:10px;
  background:#fff;
  color:#425f77;
  font-size:11.5px;
  font-weight:850;
  line-height:1.35;
  text-align:center;
}
.subject-group-label{
  margin:16px 0 9px;
  color:#35566f;
  font-size:12px;
  font-weight:950;
  letter-spacing:.05em;
}
.subject-group-label.elective{
  color:#19765a;
}
.elective-grid span{
  border-color:#cfe7dc;
  background:#f9fdfb;
  color:#2d6f59;
}
@media(max-width:900px){
  .subject-list-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media(max-width:700px){
  .year-tabs{grid-template-columns:repeat(3,1fr)}
  .subject-list-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:480px){
  .subject-list-grid{grid-template-columns:1fr}
}

/* v7: unify Years 3–5 subject sizing with Years 1–2 */
.subject-list-grid{
  gap:10px;
}
.subject-list-grid span{
  min-height:48px;
  padding:13px 16px;
  border-width:2px;
  border-radius:10px;
  font-size:14px;
  font-weight:900;
  line-height:1.4;
}
.year-subject-block-3 .subject-list-grid span{
  border-color:#6550a7;
  color:#6550a7;
}
.year-subject-block-4 .subject-list-grid:not(.elective-grid) span{
  border-color:#a66a1e;
  color:#8f5b1a;
}
.year-subject-block-5 .subject-list-grid:not(.elective-grid) span{
  border-color:#a64b55;
  color:#93434c;
}
.elective-grid span{
  border-color:#2c9360!important;
  color:#23764e!important;
}

/* v8: detail preparation notice for Years 3–5 */
.detail-preparing{
  display:flex;
  align-items:center;
  gap:9px;
  margin:0 0 15px;
  padding:9px 12px;
  border-radius:9px;
  background:rgba(255,255,255,.72);
  color:#718494;
  font-size:11px;
  font-weight:750;
}
.detail-preparing span{
  flex:0 0 auto;
  padding:3px 7px;
  border-radius:999px;
  background:#e9eff4;
  color:#526b7e;
  font-size:9px;
  font-weight:950;
  letter-spacing:.04em;
}

/* v9: preparation message in blue */
.detail-preparing{
  color:#176fa4;
}

/* v10: preparation message in red for visibility */
.detail-preparing{
  color:#c62828;
}

/* preparing navigation items */
.nav-preparing{display:inline-flex;align-items:center;gap:5px;opacity:.72;cursor:default}
.nav-preparing small{font-size:.62em;font-weight:800;color:#c62828;white-space:nowrap}

/* v13: align preparing nav items with normal navigation links */
.nav-preparing{
  font:inherit;
  font-size:inherit;
  font-weight:inherit;
  line-height:inherit;
  letter-spacing:inherit;
  vertical-align:middle;
}
.nav-preparing small{
  font-size:9px;
  line-height:1;
}

/* v14: keep each preparing menu item as one normal nav item */
.nav-preparing{
  display:flex !important;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:1px;
  white-space:nowrap;
}
.nav-preparing small{
  display:block;
  font-size:8px;
  line-height:1;
}

/* v15: dropdown preparing items align with 授業紹介 */
.nav-preparing{
  display:flex !important;
  flex-direction:row !important;
  align-items:center !important;
  justify-content:flex-start !important;
  width:100%;
  box-sizing:border-box;
  text-align:left !important;
  white-space:nowrap;
}
.nav-preparing small{
  display:inline-block;
  margin-left:7px;
  font-size:8px;
  line-height:1;
}

/* v16: preparing entries exactly match normal dropdown item typography/alignment */
.nav-preparing{
  display:block !important;
  width:auto !important;
  margin:0 !important;
  padding:14px 22px !important;
  box-sizing:border-box !important;
  color:#1d2630 !important;
  font-size:16px !important;
  font-weight:400 !important;
  line-height:1.4 !important;
  letter-spacing:0 !important;
  text-align:left !important;
  white-space:nowrap !important;
  border-top:1px solid #e5e9ed;
}
.nav-preparing small{
  display:inline !important;
  margin-left:7px !important;
  padding:0 !important;
  color:#d84b4b !important;
  font-size:9px !important;
  font-weight:800 !important;
  line-height:1 !important;
  vertical-align:middle !important;
}

/* v17: slightly reduce preparing dropdown item text */
.nav-preparing{
  font-size:15px !important;
}

/* v18: reduce preparing dropdown item text a little more */
.nav-preparing{
  font-size:14px !important;
}

.footer-preparing{color:inherit;opacity:.72;cursor:default}