:root {
  --yellow: #ffd84a;
  --blue: #2d5bff;
  --pink: #ff7aa8;
  --paper: #fffdf5;
  --ink: #16161d;
  --white: #fff;
  --font-display: "Dela Gothic One", "Noto Sans JP", sans-serif;
  --font-body: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  --border: 3px solid var(--ink);
  --shadow: 6px 6px 0 var(--ink);
  --max: 1100px;
  --pad: clamp(16px, 4vw, 40px);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 90px; }
body { font-family: var(--font-body); color: var(--ink); background: var(--paper); line-height: 1.8; overflow-x: hidden; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

/* ---------- ヘッダー ---------- */
.header { position: sticky; top: 0; z-index: 50; display: flex; align-items: center; gap: 18px; padding: 12px var(--pad); background: var(--paper); border-bottom: var(--border); }
.logo { display: flex; align-items: center; gap: 10px; margin-right: auto; font-family: var(--font-display); font-size: 1.4rem; white-space: nowrap; }
.logo small { padding: 1px 10px; font-family: var(--font-body); font-size: .68rem; font-weight: 700; color: var(--white); background: var(--blue); border-radius: 999px; }
.nav { display: flex; gap: 4px; font-size: .88rem; font-weight: 700; }
.nav a { padding: 6px 14px; border: 2px solid transparent; border-radius: 999px; white-space: nowrap; transition: background .2s, border-color .2s; }
.nav a:hover { background: var(--yellow); border-color: var(--ink); }
.header-cta { padding: 8px 22px; font-weight: 900; background: var(--pink); border: var(--border); border-radius: 999px; box-shadow: 3px 3px 0 var(--ink); white-space: nowrap; transition: transform .15s, box-shadow .15s; }
.header-cta:hover { transform: translate(3px, 3px); box-shadow: 0 0 0 var(--ink); }

.nav-toggle { display: none; position: relative; width: 44px; height: 44px; background: var(--yellow); border: var(--border); border-radius: 12px; cursor: pointer; }
.nav-toggle span { position: absolute; left: 9px; width: 20px; height: 3px; background: var(--ink); transition: transform .25s; }
.nav-toggle span:nth-child(1) { top: 14px; }
.nav-toggle span:nth-child(2) { top: 22px; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(4px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { transform: translateY(-4px) rotate(-45deg); }

/* ---------- ファーストビュー ---------- */
.hero { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); gap: 30px; align-items: center; max-width: calc(var(--max) + 120px); margin: 0 auto; padding: clamp(36px, 6vw, 76px) var(--pad); }
.hero-tag { display: inline-block; padding: 4px 16px; font-size: .84rem; font-weight: 700; background: var(--white); border: 2px solid var(--ink); border-radius: 999px; }
.hero h1 { margin: 18px 0 20px; font-family: var(--font-display); font-weight: 400; font-size: clamp(2.2rem, 6.2vw, 4.6rem); line-height: 1.3; }
.hero h1 span { display: inline-block; padding: 0 .16em; color: var(--white); background: var(--blue); border-radius: 12px; transform: rotate(-4deg); }
.hero-lead { max-width: 30em; margin-bottom: 28px; font-weight: 700; }

.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 60px; padding: 12px 34px; font-size: 1.05rem; font-weight: 900; background: var(--yellow); border: var(--border); border-radius: 16px; box-shadow: var(--shadow); transition: transform .15s, box-shadow .15s; }
.btn:hover { transform: translate(6px, 6px); box-shadow: 0 0 0 var(--ink); }
.btn-dark { color: var(--white); background: var(--ink); box-shadow: 6px 6px 0 var(--blue); }
.btn-white { background: var(--white); }

.hero-art { position: relative; aspect-ratio: 1; max-width: 460px; width: 100%; margin: 0 auto; }
.shape { position: absolute; display: grid; place-items: center; font-family: var(--font-display); border: var(--border); box-shadow: var(--shadow); }
.s1 { inset: 12% 14% 14% 12%; background: var(--yellow); border-radius: 50%; animation: float 6s ease-in-out infinite; }
.s2 { left: 0; top: 4%; width: 34%; aspect-ratio: 1; background: var(--blue); border-radius: 22px; transform: rotate(-10deg); animation: float 5s ease-in-out -1s infinite; }
.s3 { right: 2%; bottom: 4%; width: 36%; aspect-ratio: 1; background: var(--pink); clip-path: none; border-radius: 50% 50% 8px 50%; animation: float 7s ease-in-out -2s infinite; }
.s4 { right: 6%; top: 10%; width: 30%; aspect-ratio: 1; font-size: clamp(1.4rem, 4vw, 2.6rem); background: var(--white); border-radius: 50%; transform: rotate(8deg); }
.s5 { left: 6%; bottom: 8%; padding: 6px 20px; font-size: clamp(1.2rem, 3vw, 2rem); color: var(--white); background: var(--ink); border-radius: 16px; box-shadow: 6px 6px 0 var(--pink); }
@keyframes float { 50% { translate: 0 -14px; } }

.ticker { overflow: hidden; padding: 10px 0; font-weight: 900; white-space: nowrap; color: var(--white); background: var(--ink); }
.ticker div { display: inline-block; animation: ticker 26s linear infinite; }
@keyframes ticker { to { transform: translateX(-50%); } }

/* ---------- 共通 ---------- */
.section { padding: clamp(56px, 8vw, 100px) var(--pad); }
.section > * { max-width: var(--max); margin-left: auto; margin-right: auto; }
.alt { background: #eaf0ff; border-top: var(--border); border-bottom: var(--border); }
.title { margin-bottom: 36px; font-family: var(--font-display); font-weight: 400; font-size: clamp(1.5rem, 3.8vw, 2.4rem); line-height: 1.4; }
.title span { display: table; margin-bottom: 8px; padding: 0 14px; font-family: var(--font-body); font-size: .76rem; font-weight: 900; letter-spacing: .2em; background: var(--yellow); border: 2px solid var(--ink); border-radius: 999px; }
.note { margin-top: 22px; font-size: .84rem; }

/* ---------- 特長 ---------- */
.features { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.features article { padding: 26px 24px 28px; border: var(--border); border-radius: 22px; box-shadow: var(--shadow); transition: transform .2s; }
.features article:hover { transform: rotate(-1.5deg); }
.c-yellow { background: var(--yellow); }
.c-blue { color: var(--white); background: var(--blue); }
.c-pink { background: var(--pink); }
.features b { display: grid; place-items: center; width: 50px; height: 50px; margin-bottom: 12px; font-family: var(--font-display); font-size: 1.4rem; color: var(--ink); background: var(--white); border: var(--border); border-radius: 50%; }
.features h3 { margin-bottom: 8px; font-size: 1.16rem; font-weight: 900; line-height: 1.5; }
.features p { font-size: .92rem; font-weight: 500; }

/* ---------- コース(タブ) ---------- */
.tab-list { display: flex; gap: 8px; }
.tab-list button { flex: 1; padding: 14px 8px; font: inherit; font-weight: 900; background: var(--white); border: var(--border); border-bottom: 0; border-radius: 16px 16px 0 0; cursor: pointer; }
.tab-list button[aria-selected="true"] { background: var(--yellow); }
.tab-panel { padding: clamp(22px, 4vw, 40px); background: var(--white); border: var(--border); border-radius: 0 0 22px 22px; box-shadow: var(--shadow); }
.tab-panel p { margin-bottom: 18px; font-weight: 700; }
.tab-panel table { width: 100%; border-collapse: collapse; }
.tab-panel th, .tab-panel td { padding: 14px 8px; border-top: 2px dashed var(--ink); }
.tab-panel th { text-align: left; }
.tab-panel td { font-family: var(--font-display); font-size: clamp(1.3rem, 3vw, 1.9rem); text-align: right; color: var(--blue); }
.tab-panel small { margin-left: 4px; font-family: var(--font-body); font-size: .8rem; font-weight: 700; color: var(--ink); }

/* ---------- 実績 ---------- */
.results { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.results > div { padding: 22px 20px; text-align: center; background: var(--white); border: var(--border); border-radius: 22px; }
.results dt { font-size: .9rem; font-weight: 900; }
.results dd { font-family: var(--font-display); font-size: clamp(3rem, 8vw, 5.4rem); line-height: 1.15; color: var(--blue); }
.results small { font-size: 1.2rem; color: var(--ink); }

/* ---------- 講師 ---------- */
.teachers { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.teachers article { padding: 24px; text-align: center; background: var(--white); border: var(--border); border-radius: 22px; }
.face { width: 110px; aspect-ratio: 1; margin: 0 auto 14px; border: var(--border); border-radius: 50%; background-image: radial-gradient(circle at 36% 44%, var(--ink) 0 5px, transparent 5.5px), radial-gradient(circle at 64% 44%, var(--ink) 0 5px, transparent 5.5px), radial-gradient(ellipse at 50% 68%, var(--ink) 0 9px, transparent 9.5px); }
.f1 { background-color: var(--yellow); }
.f2 { background-color: var(--pink); }
.f3 { background-color: #9db4ff; }
.teachers h3 { font-size: 1.14rem; font-weight: 900; }
.teachers small { display: block; font-size: .78rem; font-weight: 700; color: var(--blue); }
.teachers p { margin-top: 8px; font-size: .9rem; text-align: left; }

/* ---------- 無料体験 ---------- */
.trial { position: relative; width: calc(100% - var(--pad) * 2); max-width: var(--max); margin: clamp(56px, 8vw, 100px) auto 0; padding: clamp(36px, 6vw, 64px) clamp(20px, 5vw, 60px); background: var(--yellow); border: var(--border); border-radius: 30px; box-shadow: 10px 10px 0 var(--ink); }
.trial-badge { position: absolute; right: clamp(14px, 4vw, 50px); top: -30px; display: grid; place-items: center; width: 92px; aspect-ratio: 1; font-family: var(--font-display); font-size: 1.4rem; color: var(--white); background: var(--pink); border: var(--border); border-radius: 50%; transform: rotate(12deg); }
.trial h2 { font-family: var(--font-display); font-weight: 400; font-size: clamp(1.5rem, 4vw, 2.6rem); line-height: 1.4; }
.trial > p { margin-top: 10px; font-weight: 700; }
.trial-actions { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 24px; }
.trial-note { font-size: .78rem; font-weight: 400 !important; }

/* ---------- 教室案内 ---------- */
.room { border: var(--border); border-radius: 22px; overflow: hidden; background: var(--white); }
.room > div { display: grid; grid-template-columns: 130px minmax(0, 1fr); border-top: 2px dashed var(--ink); }
.room > div:first-child { border-top: 0; }
.room dt { padding: 14px 20px; font-weight: 900; background: var(--yellow); }
.room dd { padding: 14px 20px; }

.footer { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px; padding: 22px var(--pad); font-size: .78rem; color: var(--white); background: var(--ink); }
.footer-logo { font-family: var(--font-display); font-size: 1.2rem; }

/* ---------- 表示アニメーション ---------- */
.js [data-reveal] { opacity: 0; transform: translateY(26px) rotate(-1.5deg); transition: opacity .5s ease, transform .5s cubic-bezier(.3, 1.3, .5, 1); }
.js [data-reveal].in { opacity: 1; transform: none; }
.js .features article[data-reveal].in:hover { transform: rotate(-1.5deg); }

@media (max-width: 980px) {
  .nav-toggle { display: block; }
  .nav { position: absolute; top: calc(100% + 10px); left: var(--pad); right: var(--pad); flex-direction: column; padding: 12px; background: var(--white); border: var(--border); border-radius: 18px; box-shadow: var(--shadow); opacity: 0; visibility: hidden; transform: translateY(-8px); transition: opacity .25s, transform .25s, visibility .25s; }
  .nav.open { opacity: 1; visibility: visible; transform: none; }
  .nav a { padding: 12px 14px; }
  .hero { grid-template-columns: minmax(0, 1fr); }
  .hero-art { max-width: 320px; }
  .features, .teachers { grid-template-columns: minmax(0, 1fr); }
  .results { grid-template-columns: minmax(0, 1fr); gap: 16px; }
}

@media (max-width: 560px) {
  .logo { font-size: 1.14rem; }
  .logo small { display: none; }
  .header-cta { padding: 6px 16px; font-size: .88rem; }
  .room > div { grid-template-columns: minmax(0, 1fr); }
  .room dt { padding: 8px 16px; }
  .room dd { padding: 10px 16px; }
  .btn { width: 100%; }
  .trial-badge { width: 72px; font-size: 1.1rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .js [data-reveal] { opacity: 1; transform: none; }
}