/* ============================================================
   Keico Watanabe — Between Stars and Humans
   Site renewal 2026 / design draft v2
   Layout modeled after masaakisato.com:
   fixed left sidebar, bold grotesque type, mustard accent,
   large single-image slideshows with captions + dot pagination
   ============================================================ */
:root{
  --ink:#222;
  --gray:#777;
  --lightgray:#aaa;
  --accent:#e2a63d;           /* mustard yellow (active nav) */
  --bg:#fff;
  --sans:"Helvetica Neue",Helvetica,"Hiragino Kaku Gothic ProN","Hiragino Sans","Noto Sans JP",Arial,sans-serif;
  --sidebar-w:340px;
  --pad:42px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:15px;line-height:1.55;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
a:hover{opacity:.75}

/* ------------------------------------------------------------
   SIDEBAR (inner pages)
   ------------------------------------------------------------ */
.sidebar{position:fixed;top:var(--pad);left:var(--pad);width:var(--sidebar-w);z-index:20}
.brand{font-size:33px;font-weight:700;letter-spacing:-.02em;line-height:1.1;color:#222;display:inline-block}
.brand .jp-name{display:block;font-size:19px;font-weight:600;letter-spacing:.05em;margin-top:10px}
.brand-logo{width:340px;max-width:80vw;height:auto}
.brand:hover{opacity:1}
.home-logo{width:340px;max-width:72vw;filter:drop-shadow(0 1px 6px rgba(0,0,0,.35))}
.side-nav{margin-top:56px;font-size:15px;font-weight:500}
.side-nav ul{list-style:none}
.side-nav>ul>li{margin-bottom:34px}
.side-nav a .j{font-size:14px}
.side-nav .active>a,.side-nav a.active{color:var(--accent)}
.side-nav .sub{margin:16px 0 0 8px;font-weight:400}
.side-nav .sub li{margin-bottom:9px;line-height:1.4}
.side-nav .sub .j{color:inherit}

/* social icons under sidebar nav */
.side-social{margin-top:52px;display:flex;align-items:center;gap:16px}
.side-social a{display:block;line-height:0}
.side-social svg{width:19px;height:19px;fill:#b5b5b5;transition:fill .2s}
.side-social a:hover{opacity:1}
.side-social a:hover svg{fill:var(--ink)}

/* ------------------------------------------------------------
   CONTENT AREA
   ------------------------------------------------------------ */
.content{margin-left:calc(var(--sidebar-w) + var(--pad) + 48px);padding:var(--pad) var(--pad) 60px 0;min-height:92vh}
.content-inner{max-width:none}
.content-inner.text{max-width:900px}
/* align first content element with the "Artworks" nav line:
   logo height (~53px) + nav margin (56px) - title ascent compensation */
.content-inner > :first-child{margin-top:104px !important}

/* ------------------------------------------------------------
   SERIES TITLE + MEDIA FILTER (gallery pages)
   ------------------------------------------------------------ */
.series-head{margin-top:66px}
.series-head .en{font-size:27px;font-weight:400;color:#444;letter-spacing:.01em;line-height:1.3}
.series-head .jp{font-size:14px;color:#999;letter-spacing:.06em;margin-top:7px}
.filter-bar{margin-top:26px;display:flex;flex-wrap:wrap;align-items:center}
.filter-bar button{background:none;border:0;padding:2px 0;font-family:var(--sans);font-size:13px;color:#999;cursor:pointer;letter-spacing:.02em}
.filter-bar button:hover{color:var(--ink)}
.filter-bar button.on{font-weight:700;color:var(--ink)}
.filter-bar button + button{margin-left:14px;border-left:1px solid #ddd;padding-left:14px}

/* ------------------------------------------------------------
   GRID GALLERY (gallery pages)
   ------------------------------------------------------------ */
.ggrid{display:flex;align-items:flex-start;gap:32px;margin-top:66px}
.ggrid .gcol{flex:1;min-width:0}
.ggrid figure{margin-bottom:44px;cursor:zoom-in}
.ggrid img{width:100%}
.ggrid figcaption{margin-top:12px;font-size:14px;line-height:1.5;color:var(--ink)}
.ggrid figcaption .d{display:block;font-size:12.5px;color:#999;margin-top:3px}

/* ------------------------------------------------------------
   FULLSCREEN LIGHTBOX
   ------------------------------------------------------------ */
#lightbox{position:fixed;inset:0;background:rgba(255,255,255,.985);z-index:300;display:none;flex-direction:column;align-items:center;justify-content:center;padding:56px 90px 30px}
#lightbox.open{display:flex}
#lightbox .lb-img{max-width:100%;max-height:calc(100vh - 190px);width:auto;height:auto;object-fit:contain}
.lb-cap{text-align:center;margin-top:22px;font-size:14px;line-height:1.6;color:var(--ink)}
.lb-cap .d{display:block;font-size:12.5px;color:#999;margin-top:3px}
.lb-cap .lb-verse{font-size:12.5px;color:#777;line-height:1.7;margin:10px auto 0;max-width:620px}
.lb-count{margin-top:10px;font-size:12px;color:#aaa;letter-spacing:.14em}
.lb-btn{position:fixed;background:none;border:0;cursor:pointer;color:#444;font-family:var(--sans);line-height:1;padding:14px}
.lb-btn:hover{color:#000}
.lb-close{top:22px;right:26px;font-size:26px}
.lb-prev{left:14px;top:50%;transform:translateY(-50%);font-size:30px}
.lb-next{right:14px;top:50%;transform:translateY(-50%);font-size:30px}

/* ------------------------------------------------------------
   HOME (fullscreen slideshow)
   ------------------------------------------------------------ */
body.home{overflow:hidden}
.home-slides{position:fixed;inset:0;z-index:1;background:#111}
.home-slides .hs{position:absolute;inset:0;background-size:cover;background-position:center;opacity:0;transition:opacity 1.8s ease}
.home-slides .hs.on{opacity:1}
.home-slides::after{content:"";position:absolute;inset:0;background:linear-gradient(120deg,rgba(0,0,0,.34) 0%,rgba(0,0,0,.05) 55%)}
.home-overlay{position:fixed;top:var(--pad);left:var(--pad);z-index:10;color:#fff}
.home-overlay .brand{color:#fff}
.home-overlay .jp-name{color:#fff}
.home-nav{margin-top:40px;display:flex;flex-wrap:wrap;gap:14px 36px;font-size:21px;font-weight:700;letter-spacing:-.01em}
.home-nav a{color:#fff;text-shadow:0 1px 8px rgba(0,0,0,.45)}
.home-theme{position:fixed;left:var(--pad);bottom:var(--pad);z-index:10;color:#fff;text-shadow:0 1px 8px rgba(0,0,0,.45)}
.home-theme .en{font-size:21px;font-weight:700;letter-spacing:.01em}
.home-theme .jp{font-size:13px;margin-top:6px;letter-spacing:.3em}

/* ------------------------------------------------------------
   TEXT PAGES
   ------------------------------------------------------------ */
.page-title{font-size:15px;font-weight:700;margin-top:66px}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:64px;margin-top:66px;font-size:13px;line-height:1.85;max-width:900px}
.two-col h3{font-size:13px;font-weight:700;margin:26px 0 4px}
.two-col h3:first-child{margin-top:0}
.two-col p{margin-bottom:14px}
.portrait{max-width:340px;margin-top:66px}
.bio-top{display:flex;gap:56px;align-items:flex-start;max-width:1100px}
.bio-top .bio-text{flex:1}
.bio-top .portrait-wrap{width:280px;flex-shrink:0;margin-top:6px}
.bio-top .portrait{width:100%;max-width:none;margin:0 0 22px}
.bio-top .portrait:last-child{margin-bottom:0}
.portrait img{filter:grayscale(1)}
.portrait figcaption{font-size:12px;color:#999;margin-top:10px}

/* language tabs (biography) */
.lang-tabs{margin-top:66px;border-bottom:1px solid #e5e5e5;display:flex;gap:4px}
.lang-tabs button{background:none;border:1px solid transparent;border-bottom:0;padding:10px 26px;font-family:var(--sans);font-size:14px;font-weight:700;color:#999;cursor:pointer}
.lang-tabs button.on{color:var(--ink);border-color:#e5e5e5;background:#fff;margin-bottom:-1px;border-bottom:1px solid #fff}
.lang-tabs a{display:block;border:1px solid transparent;border-bottom:0;padding:10px 26px;font-size:14px;font-weight:700;color:#999}
.lang-tabs a.on{color:var(--ink);border-color:#e5e5e5;background:#fff;margin-bottom:-1px;border-bottom:1px solid #fff}
.lang-tabs a:hover{opacity:1;color:var(--ink)}
.tab-pane{display:none}
.tab-pane.on{display:block}
.tab-pane .bio-head{font-size:26px;font-weight:400;color:#555;margin:44px 0 18px}
.tab-pane .bio-text{max-width:760px;font-size:13.5px;line-height:1.9}

/* exhibitions */
.list-block{max-width:760px;margin-top:66px;font-size:13.5px}
.list-block h3{font-size:13.5px;font-weight:700;margin:44px 0 14px}
.list-block h3:first-child{margin-top:0}
.list-block table{width:100%;border-collapse:collapse}
.list-block td{padding:6px 8px 6px 0;vertical-align:top;line-height:1.6}
.list-block td:first-child{width:88px;white-space:nowrap;color:#999}
.news-strong td{color:var(--ink)}
.news-strong td:first-child{color:var(--accent);font-weight:700}

/* goods */
.goods-list{max-width:640px;margin-top:66px}
.goods-item{padding:30px 0;border-bottom:1px solid #eee}
.goods-item:first-child{border-top:1px solid #eee}
.goods-item h3{font-size:14px;font-weight:700}
.goods-item .j{font-weight:400;color:#999;margin-left:10px;font-size:13px}
.goods-item p{font-size:13px;color:#666;margin-top:8px}
.goods-item a.note-link{display:inline-block;margin-top:12px;font-size:13px;font-weight:700;color:var(--accent)}
.goods-foot{font-size:12px;color:#999;margin-top:30px}

/* contact */
.contact-block{margin-top:66px;font-size:14px;line-height:2;max-width:640px}
.contact-block .mail{font-weight:700;border-bottom:2px solid var(--accent)}

/* contact form */
.contact-grid{display:flex;gap:64px;align-items:flex-start;max-width:1100px}
.contact-main{flex:1;min-width:0}
.studio-side{width:320px;flex-shrink:0}
.studio-side h3{font-size:19px;font-weight:700;padding-bottom:10px;border-bottom:1px solid #e5e5e5}
.studio-side .addr{font-size:13.5px;line-height:1.7;margin:14px 0 22px}
.studio-side img{width:100%;margin-bottom:18px}

.cform{max-width:640px;margin-top:44px}
.cform label{display:block;font-size:12.5px;font-weight:700;margin:22px 0 7px;letter-spacing:.03em}
.cform label .req{color:var(--accent)}
.cform input,.cform textarea{width:100%;border:1px solid #ddd;background:#fff;padding:12px 14px;font-family:var(--sans);font-size:14px;color:var(--ink);border-radius:0;-webkit-appearance:none}
.cform input:focus,.cform textarea:focus{outline:none;border-color:var(--accent)}
.cform textarea{min-height:170px;resize:vertical}
.cform .hp{position:absolute;left:-9999px;top:-9999px}
.cform button{margin-top:26px;background:var(--ink);color:#fff;border:0;padding:14px 44px;font-size:13px;font-weight:700;letter-spacing:.14em;cursor:pointer;font-family:var(--sans)}
.cform button:hover{background:var(--accent)}
.cform button:disabled{background:#bbb;cursor:default}
.form-msg{margin-top:18px;font-size:13.5px;display:none}
.form-msg.ok{display:block;color:#2e7d32}
.form-msg.err{display:block;color:#c62828}
.links-row{margin-top:44px;font-size:13px;font-weight:700;display:flex;flex-wrap:wrap;gap:24px}
.links-row a{border-bottom:2px solid #eee;padding-bottom:2px}
.links-row a:hover{border-color:var(--accent);opacity:1}

/* video */
.video-wrap{max-width:900px;margin-top:66px;aspect-ratio:16/9}
.video-wrap iframe{width:100%;height:100%;border:0}
.photo-row{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;max-width:900px;margin-top:44px}
.photo-row figcaption{font-size:12px;color:#777;margin-top:8px;line-height:1.5}
.photo-row figcaption .d{display:block;color:#999}

.foot-copy{margin-top:90px;font-size:11px;color:#bbb}

/* hamburger button (mobile only) */
.menu-btn{display:none;background:none;border:0;padding:8px;cursor:pointer}
.menu-btn span{display:block;width:22px;height:2px;background:#222;margin:5px 0;transition:transform .2s,opacity .2s}
.sidebar.nav-open .menu-btn span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.sidebar.nav-open .menu-btn span:nth-child(2){opacity:0}
.sidebar.nav-open .menu-btn span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* home slideshow click-through */
.home-slides{cursor:pointer}

/* back-to-top button */
.to-top{position:fixed;right:26px;bottom:26px;z-index:60;width:48px;height:48px;border:0;border-radius:50%;background:#111;cursor:pointer;display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transform:translateY(8px);transition:opacity .25s,transform .25s,visibility .25s,background .2s}
.to-top svg{width:16px;height:16px;stroke:#fff;stroke-width:2.4;fill:none;stroke-linecap:round;stroke-linejoin:round}
.to-top.show{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:#000;opacity:1}

/* ------------------------------------------------------------
   RESPONSIVE
   ------------------------------------------------------------ */
@media(max-width:860px){
  .sidebar{position:static;width:auto;padding:16px 20px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;border-bottom:1px solid #eee}
  .brand-logo{width:180px}
  .menu-btn{display:block}
  .content{margin-left:0;padding:0 24px 50px}
  .content-inner > :first-child{margin-top:30px !important}
  .series-head .en{font-size:14px;font-weight:600;color:#444}
  .series-head .jp{font-size:13px;margin-top:4px}
  .bio-head{font-size:18px}
  .side-nav{display:none;width:100%;margin-top:24px}
  .sidebar.nav-open .side-nav{display:block}
  .side-social{display:none;width:100%;margin:26px 0 10px}
  .sidebar.nav-open .side-social{display:flex}
  .side-nav>ul{display:block}
  .side-nav>ul>li{margin-bottom:18px}
  .ggrid{gap:0}
  #lightbox{padding:56px 44px 24px}
  .lb-prev{left:0}
  .lb-next{right:0}
  .two-col{grid-template-columns:1fr;gap:30px}
  .photo-row{grid-template-columns:1fr}
  .bio-top{flex-direction:column;gap:28px}
  .bio-top .portrait{width:100%;max-width:300px}
  .contact-grid{flex-direction:column;gap:40px}
  .studio-side{width:100%;max-width:420px}
  .home-nav{gap:18px}
  :root{--pad:24px}
}