/* 波急電鉄 共通CSS  /assets/css/site.css
   全ページで読み込む。ヘッダー/フッターは assets/js/header.js が描画する */

/* ---------- デザイントークン ---------- */
:root{
  --navy:#424242; --cyan:#19d3e3;
  --bg-primary:#fafafa; --bg-secondary:#f1f1f1; --bg-surface:#ffffff;
  --text-primary:#373838; --text-secondary:#797a7a; --text-muted:#9e9e9e;
  --border:#e6e6e6; --accent-blue:#0b8fa6; --status-good:#16a34a;
  --card-shadow:0 2px 10px rgba(11,37,64,.08);
  --card-hover-shadow:0 12px 32px rgba(11,37,64,.2);
  --transition:all .2s ease;
  --font:"Zen Maru Gothic","Hiragino Maru Gothic ProN","Yu Gothic","Meiryo",sans-serif;
  --header-h:69px;          /* ヘッダー64px + 下線5px */
  --z-header:350;
  color-scheme:light;
}
[data-theme="dark"]{
  --bg-primary:#272727; --bg-secondary:#39393a; --bg-surface:#303031;
  --text-primary:#f8f8f8; --text-secondary:#cdcecf; --text-muted:#a0a0a0;
  --border:#555555; --accent-blue:#3ee0ee; --status-good:#22c55e;
  --card-shadow:0 2px 12px rgba(0,0,0,.35);
  --card-hover-shadow:0 14px 36px rgba(0,0,0,.55);
  color-scheme:dark;
}

/* ---------- ベース ---------- */
*{box-sizing:border-box}
body{margin:0;font-family:var(--font);background:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
a:focus-visible,button:focus-visible{outline:3px solid var(--cyan);outline-offset:3px}
.container{max-width:1100px;margin:0 auto;padding:0 clamp(16px,3vw,32px)}

/* ---------- ヘッダー ---------- */
.site-header{position:sticky;top:0;z-index:var(--z-header);min-height:var(--header-h);background:var(--bg-surface);border-bottom:5px solid var(--cyan)}
.site-header__bar{display:flex;align-items:center;gap:16px;height:64px;padding:0 clamp(16px,3vw,40px)}
.brand{display:flex;align-items:center;margin-right:auto}
.brand img{height:44px;width:auto;display:block}

.site-nav__list{display:flex;gap:clamp(2px,1vw,10px);height:64px;margin:0;padding:0;list-style:none}
.site-nav__item{position:relative;display:flex;align-items:stretch}
.navbtn{position:relative;display:flex;align-items:center;gap:8px;padding:0 14px;border:0;background:none;color:var(--text-primary);font:700 15px/1 var(--font);letter-spacing:.04em;cursor:pointer}
.navbtn::after{content:"";position:absolute;left:14px;right:14px;bottom:10px;height:3px;border-radius:2px;background:var(--cyan);transform:scaleX(0);transition:transform .25s ease}
.is-open>.navbtn::after,.has-current>.navbtn::after{transform:scaleX(1)}
.navbtn__caret{width:7px;height:7px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg) translateY(-2px);transition:transform .3s cubic-bezier(.16,1,.3,1)}
.is-open>.navbtn .navbtn__caret{transform:rotate(225deg) translate(-2px,0)}

/* 下に滑らかに開くメニュー(クリップで上から展開) */
.subnav{position:absolute;top:calc(100% + 5px);left:0;min-width:220px;margin:0;padding:8px;list-style:none;
  background:var(--bg-surface);border:1.5px solid var(--border);border-radius:14px;box-shadow:var(--card-hover-shadow);
  opacity:0;visibility:hidden;transform:translateY(-10px);clip-path:inset(-10px -40px 100% -40px);
  transition:clip-path .34s cubic-bezier(.16,1,.3,1),opacity .2s ease,transform .34s cubic-bezier(.16,1,.3,1),visibility 0s .34s}
.subnav::before{content:"";position:absolute;left:0;right:0;top:-6px;height:6px}  /* マウスが隙間で外れないための橋 */
.is-open>.subnav{opacity:1;visibility:visible;transform:none;clip-path:inset(-10px -40px -40px -40px);transition-delay:0s}
.subnav a{display:block;padding:10px 14px;border-radius:9px;font-size:14px;font-weight:700;white-space:nowrap;
  transition:background-color .15s,padding-left .2s ease}
.subnav a:hover,.subnav a:focus-visible{background:var(--bg-secondary);padding-left:20px}
.subnav a[aria-current="page"]{background:var(--bg-secondary);box-shadow:inset 3px 0 0 var(--cyan)}

.site-header__actions{display:flex;align-items:center;gap:6px}
.iconbtn{display:grid;place-items:center;width:40px;height:40px;border:0;border-radius:10px;background:none;color:var(--text-primary);cursor:pointer;transition:background-color .15s}
.iconbtn:hover{background:var(--bg-secondary)}
.iconbtn svg{width:20px;height:20px}
.theme-icon-moon,[data-theme="dark"] .theme-icon-sun{display:none}
[data-theme="dark"] .theme-icon-moon{display:block}
.menu-toggle{display:none}

@media (max-width:860px){
  .menu-toggle{display:grid}
  .site-nav{position:absolute;left:0;right:0;top:100%;max-height:calc(100vh - var(--header-h));overflow:auto;
    padding:6px 16px 16px;background:var(--bg-surface);border-bottom:5px solid var(--cyan);
    opacity:0;visibility:hidden;transform:translateY(-8px);transition:opacity .2s,transform .25s,visibility 0s .25s}
  .site-nav.is-visible{opacity:1;visibility:visible;transform:none;transition-delay:0s}
  .site-nav__list{flex-direction:column;height:auto;gap:0}
  .site-nav__item{flex-direction:column}
  .navbtn{width:100%;justify-content:space-between;padding:16px 8px;border-bottom:1px solid var(--border)}
  .navbtn::after{display:none}
  .subnav{position:static;min-width:0;padding:0 0 0 12px;border:0;border-radius:0;box-shadow:none;
    opacity:1;visibility:visible;transform:none;clip-path:none;max-height:0;overflow:hidden;transition:max-height .3s ease}
  .subnav::before{display:none}
  .is-open>.subnav{max-height:320px;clip-path:none}
}

/* ---------- フッター ---------- */
.site-footer{display:flex;flex-wrap:wrap;gap:12px 28px;align-items:center;justify-content:space-between;
  padding:22px clamp(16px,3vw,40px);background:var(--navy);color:#fff;border-top:5px solid var(--cyan);font-size:14px;letter-spacing:.06em}
.site-footer ul{display:flex;flex-wrap:wrap;gap:8px 20px;margin:0;padding:0;list-style:none}
.site-footer a:hover{color:var(--cyan)}

/* ---------- 共通パーツ ---------- */
.main-content{min-height:calc(100vh - var(--header-h) - 74px);padding:clamp(24px,5vw,56px) 0 clamp(40px,6vw,80px)}
.hero{padding:clamp(8px,2vw,24px) 0 2rem;text-align:center}
.badge{display:inline-block;padding:4px 14px;border-radius:999px;background:var(--cyan);color:var(--navy);font-size:12px;font-weight:900;letter-spacing:.1em}
.hero-title{margin:14px 0 8px;font-size:clamp(26px,4vw,40px);font-weight:900;letter-spacing:.06em}
.hero-subtitle{margin:0;color:var(--text-secondary);font-weight:500}
.grid-3{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px}
.card{padding:24px;background:var(--bg-surface);border:1.5px solid var(--border);border-radius:20px;box-shadow:var(--card-shadow)}
.card-title{margin:0 0 10px;font-size:18px;font-weight:900;letter-spacing:.06em}
.card-desc{margin:0;color:var(--text-secondary);font-weight:500;line-height:1.8}
.btn{display:flex;justify-content:center;padding:12px 20px;border:2px solid var(--cyan);border-radius:999px;font-weight:900;letter-spacing:.06em;transition:background-color .15s,transform .15s}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--cyan);color:var(--navy)}
.btn-primary:hover{background:#5ee6f2;border-color:#5ee6f2}
.btn-secondary{background:transparent;color:var(--text-primary)}
.btn-secondary:hover{background:var(--bg-secondary)}
.section-accent-header{display:flex;align-items:center;gap:12px;margin-bottom:20px}
.section-accent-bar{width:6px;height:28px;border-radius:3px;background:var(--cyan)}
.section-accent-title{margin:0;font-size:clamp(20px,3vw,26px);font-weight:900;letter-spacing:.08em}
.player-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px}
.player-grid>*{padding:12px;background:var(--bg-surface);border:1.5px solid var(--border);border-radius:14px;box-shadow:var(--card-shadow)}
.status-dot-live{display:inline-block;width:10px;height:10px;border-radius:50%;background:#22c55e;animation:livePulse 1.8s ease-out infinite}

@keyframes popIn{0%{opacity:0;transform:scale(0)}70%{transform:scale(1.2)}100%{opacity:1;transform:scale(1)}}
@keyframes modalZoomIn{from{opacity:0;transform:scale(.94)}to{opacity:1;transform:scale(1)}}
@keyframes arrowLoop{0%{opacity:.15}30%{opacity:1;transform:rotate(45deg) scale(1.2)}60%,100%{opacity:.15;transform:rotate(45deg) scale(1)}}
@keyframes livePulse{0%{box-shadow:0 0 0 0 rgba(34,197,94,.55)}100%{box-shadow:0 0 0 8px rgba(34,197,94,0)}}

@media (prefers-reduced-motion:reduce){
  .subnav,.navbtn::after,.navbtn__caret,.site-nav{transition-duration:.01s}
  .status-dot-live{animation:none}
}