/* ===== Theme ===== */
:root{
  --bg: #0B0F15;
  --surface: #0F1623;
  --text: #E5F0FF;
  --muted: #9CB0C8;
  --line: #223147;
  --accent: #34D0FF;
  --accent-2:#FF4D9D;
}

*{box-sizing:border-box}
html,body{height:100%}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family: Inter, 'Noto Sans JP', system-ui, -apple-system, Segoe UI, Roboto, 'Hiragino Kaku Gothic ProN','Yu Gothic UI','Yu Gothic', Meiryo, sans-serif;
  line-height:1.7;
}

/* ===== Utilities ===== */
.container{width:min(1100px, 92%); margin-inline:auto}
.container--fluid{width:100%; max-width:none}
.section{padding: clamp(48px, 6vw, 80px) 0; position:relative}
.section-title{font-size: clamp(24px, 4vw, 40px); letter-spacing:.06em; margin: 0 0 24px; font-weight: 700}
.center{text-align:center}
.lead{font-size: clamp(14px, 2.2vw, 18px); color:var(--muted)}

/* ===== Header / Nav ===== */
#site-header{
  position:sticky; top:0; z-index:100;
  background: color-mix(in oklab, var(--bg) 82%, transparent);
  backdrop-filter:saturate(1.2) blur(10px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex; align-items:center; gap:24px; height:72px}
.brand{display:flex; align-items:center}
.menu{display:flex; gap:28px; margin:0 0 0 auto; padding:0; list-style:none}
.menu a{color:var(--text); opacity:.9; text-decoration:none; font-weight:500}
.menu a:hover{opacity:1; color:var(--accent)}
.hamburger{display:none; width:40px; height:40px; background:transparent; border:1px solid var(--line); border-radius:10px; position:relative}
.hamburger__bar, .hamburger__bar::before, .hamburger__bar::after{
  content:''; position:absolute; left:8px; right:8px; height:2px; background:var(--text); top:50%; transform:translateY(-50%)
}
.hamburger__bar::before{top:-8px}
.hamburger__bar::after{top:8px}
.sr-only{position:absolute; clip:rect(0 0 0 0); width:1px; height:1px; margin:-1px; overflow:hidden}

/* Mobile Nav */
@media (max-width: 960px){
  .hamburger{display:block; margin-left:auto}
  .menu{position:fixed; inset:0 0 auto auto; top:72px; height:calc(100dvh - 72px); width:100%; background:color-mix(in oklab, var(--bg) 94%, transparent);
        flex-direction:column; align-items:center; justify-content:center; gap:16px; transform:translateY(2%); opacity:0; pointer-events:none;
        transition:opacity .2s ease}
  .menu.is-active{opacity:1; pointer-events:auto}
}

/* ===== Gallery (randomized grid) ===== */
.section--gallery{padding:0}
.gallery-grid{
  display:grid;
  grid-template-columns: repeat(12, 1fr);
  grid-auto-rows: 9vw; /* responsive row height */
  gap: 8px;
  width:100%;
  min-height: calc(100dvh - 72px);
  padding: 8px;
}
@media (max-width: 1200px){
  .gallery-grid{grid-template-columns: repeat(8, 1fr); grid-auto-rows: 12vw}
}
@media (max-width: 800px){
  .gallery-grid{grid-template-columns: repeat(6, 1fr); grid-auto-rows: 16vw}
}
@media (max-width: 560px){
  .gallery-grid{grid-template-columns: repeat(4, 1fr); grid-auto-rows: 24vw}
}

.tile{
  position:relative; border-radius:14px; overflow:hidden;
  border:1px solid var(--line);
  cursor:pointer; transform:translateZ(0);
  transition:transform .12s ease-out, box-shadow .2s ease;
  background: #0a0f18;
}
.tile:focus-visible{outline:3px solid color-mix(in oklab, var(--accent) 70%, white 10%)}
.tile:hover{transform:translateY(-2px); box-shadow:0 8px 22px rgba(0,0,0,.35)}
.tile__img{
  position:absolute; inset:0; width:100%; height:100%; object-fit:cover; filter:saturate(1.06) contrast(1.04)
}
.tile__badge{
  position:absolute; left:10px; bottom:10px;
  font-size:12px; line-height:1; padding:6px 8px; border-radius:8px;
  background: color-mix(in oklab, #000 55%, var(--surface) 45%);
  color:#E6F2FF; border: 1px solid rgba(255,255,255,.12)
}

/* Random size classes */
.tile.w1{grid-column: span 3}
.tile.w2{grid-column: span 4}
.tile.w3{grid-column: span 6}

.tile.h1{grid-row: span 1}
.tile.h2{grid-row: span 2}
.tile.h3{grid-row: span 3}

/* ===== Profile / Achievements ===== */
.grid--profile{display:grid; grid-template-columns: 320px 1fr; gap:clamp(20px, 4vw, 48px); align-items:center}
.avatar{width:100%; height:auto; border-radius:50%; border:1px solid var(--line); box-shadow: 0 10px 40px rgba(0,0,0,.4)}
.profile__right .social{display:flex; gap:10px; margin:10px 0 16px}
.profile__right .icon{display:inline-flex; width:36px; height:36px; align-items:center; justify-content:center; border:1px solid var(--line); border-radius:10px}
.meta{display:grid; gap:10px; margin-top:6px}
.meta dt{color:var(--muted); font-weight:600; min-width:72px}
.meta dd{margin:0}
@media (max-width: 900px){
  .grid--profile{grid-template-columns: 1fr; text-align:center}
  .profile__right .social{justify-content:center}
  .meta{justify-items:center}
}

.columns{display:grid; grid-template-columns: 1fr 1fr; gap:24px}
.columns .list{margin: 8px 0 24px; padding-left: 1rem}
.columns .list li{margin: 6px 0}
.list--small{font-size:.95rem; color:var(--muted)}
@media (max-width: 880px){
  .columns{grid-template-columns:1fr}
}

/* ===== Modal ===== */
.modal{position:fixed; inset:0; z-index:150; display:none}
.modal.is-open{display:block}
.modal__backdrop{position:absolute; inset:0; background:rgba(0,0,0,.65); backdrop-filter: blur(2px)}
.modal__dialog{
  position:absolute; top:50%; left:50%; transform:translate(-50%, -50%);
  width:min(1040px, 92vw); max-height:86vh; display:grid; grid-template-columns: 1.4fr 1fr; gap:18px;
  background: color-mix(in oklab, var(--surface) 92%, #000 8%); border:1px solid var(--line); border-radius:16px; padding:14px;
  box-shadow: 0 20px 80px rgba(0,0,0,.4);
}
@media (max-width: 960px){
  .modal__dialog{grid-template-columns:1fr; max-height:90vh}
}
.modal__close{
  position:absolute; right:10px; top:10px; width:36px; height:36px;
  border-radius:10px; border:1px solid var(--line); background:transparent; color:var(--text); font-size:20px; cursor:pointer
}
.modal__media{position:relative; border-radius:12px; overflow:hidden; border:1px solid var(--line); aspect-ratio:16/10}
.modal__media img{width:100%; height:100%; object-fit:cover}
.modal__nav{
  position:absolute; top:50%; transform:translateY(-50%);
  width:42px; height:42px; border-radius:12px; border:1px solid var(--line);
  background: color-mix(in oklab, var(--surface) 85%, #000 15%); color:var(--text); cursor:pointer;
  display:grid; place-items:center; font-size:28px; line-height:1;
}
.modal__nav--prev{left:8px}
.modal__nav--next{right:8px}
.modal__body{overflow:auto; padding-right:6px}
.modal__title{margin:.4rem 0 .4rem; font-size: clamp(18px, 2.6vw, 26px); letter-spacing:.02em}
.modal__desc{color:var(--muted); margin:.4rem 0 1rem}
.modal__meta{display:flex; flex-wrap:wrap; gap:8px; margin-bottom:10px}
.badge{font-size:12px; padding:6px 8px; border-radius:999px; border:1px solid var(--line); color:var(--text); background:color-mix(in oklab, var(--surface) 88%, #000 12%)}
.modal__links a{display:inline-flex; align-items:center; height:40px; padding:0 14px; border-radius:10px; text-decoration:none; color:var(--text); border:1px solid var(--line); margin-right:8px}
.modal__links a:hover{border-color:var(--accent)}
/* ===== Footer ===== */
.footer{border-top:1px solid var(--line); padding:28px 0; background: color-mix(in oklab, var(--bg) 90%, transparent)}
.footnote{color:var(--muted); margin:0; font-size:.95rem}