/* Self-hosted so first paint never waits on fonts.googleapis.com +
   fonts.gstatic.com (two extra DNS+TLS round trips on the critical path).
   One variable file covers 300-800. */
@font-face{
  font-family:'JetBrains Mono'; font-style:normal; font-weight:300 800; font-display:swap;
  src:url('/assets/fonts/jetbrains-mono-latin.woff2') format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face{
  font-family:'JetBrains Mono'; font-style:normal; font-weight:300 800; font-display:swap;
  src:url('/assets/fonts/jetbrains-mono-latin-ext.woff2') format('woff2');
  unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF;
}

/* Blackhole — anime-flavoured liquid glass. Dark by default; light only when
   the OS explicitly asks for it. All tokens live here, nothing hard-codes a
   colour below the token block. */

:root{
  color-scheme:dark;
  --bg:#060b18;
  --bg-2:#0b1430;
  --ink:#e8f0ff;
  --muted:#93a9d0;
  --line:rgba(255,255,255,.12);
  --edge:rgba(255,255,255,.22);        /* specular top edge of a glass pane */
  --glass:linear-gradient(158deg, rgba(255,255,255,.10), rgba(255,255,255,.025));
  --glass-hi:linear-gradient(158deg, rgba(255,255,255,.16), rgba(255,255,255,.05));
  --blur:blur(22px) saturate(165%);
  --shadow:0 10px 34px rgba(2,6,20,.55), inset 0 1px 0 var(--edge);
  --blue:#3b9dff;
  --azure:#6fd2ff;
  --violet:#9d7bff;
  --pink:#ff74c8;
  --mint:#54e6b5;
  --danger:#ff6b81;
  --cell:linear-gradient(180deg, rgba(255,255,255,.14), rgba(255,255,255,.04));
  --cell-open:rgba(4,10,26,.42);
  --r:16px;
}

@media (prefers-color-scheme: light){
  :root{
    color-scheme:light;
    --bg:#eaf2fe;
    --bg-2:#dbe9fd;
    --ink:#0e1c38;
    --muted:#5872a0;
    --line:rgba(15,37,87,.14);
    --edge:rgba(255,255,255,.85);
    --glass:linear-gradient(158deg, rgba(255,255,255,.78), rgba(255,255,255,.48));
    --glass-hi:linear-gradient(158deg, rgba(255,255,255,.92), rgba(255,255,255,.62));
    --shadow:0 10px 30px rgba(15,37,87,.14), inset 0 1px 0 var(--edge);
    --blue:#1a7fd4;
    --azure:#0f6ba8;
    --violet:#7b5bde;
    --pink:#cf2a86;
    --mint:#12a37a;
    --danger:#d8394b;
    --cell:linear-gradient(180deg, rgba(255,255,255,.95), rgba(219,233,253,.85));
    --cell-open:rgba(255,255,255,.42);
  }
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; min-height:100vh; background:var(--bg); color:var(--ink);
  font:400 15.5px/1.65 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  -webkit-font-smoothing:antialiased; overflow-x:hidden;
}

/* ---------- aurora backdrop ---------- */
.aurora{position:fixed; inset:-20vmax; z-index:-2; pointer-events:none; filter:blur(38px)}
.aurora i{position:absolute; display:block; border-radius:50%; opacity:.62; mix-blend-mode:screen}
.aurora i:nth-child(1){width:52vmax; height:52vmax; left:52%; top:-12%;
  background:radial-gradient(circle, var(--blue), transparent 66%); animation:drift 26s ease-in-out infinite}
.aurora i:nth-child(2){width:44vmax; height:44vmax; left:-6%; top:6%;
  background:radial-gradient(circle, var(--violet), transparent 66%); animation:drift 32s ease-in-out infinite reverse}
.aurora i:nth-child(3){width:38vmax; height:38vmax; left:24%; top:48%;
  background:radial-gradient(circle, var(--pink), transparent 68%); opacity:.34;
  animation:drift 40s ease-in-out infinite}
@media (prefers-color-scheme: light){ .aurora{opacity:.42; mix-blend-mode:normal} }
@keyframes drift{
  0%,100%{transform:translate3d(0,0,0) scale(1)}
  33%{transform:translate3d(6%,-5%,0) scale(1.12)}
  66%{transform:translate3d(-5%,6%,0) scale(.94)}
}
/* faint scanline grid — reads as anime UI chrome */
body::after{
  content:""; position:fixed; inset:0; z-index:-1; pointer-events:none; opacity:.35;
  background:
    linear-gradient(transparent 96%, rgba(111,210,255,.10) 100%) 0 0/100% 5px,
    linear-gradient(90deg, transparent 96%, rgba(111,210,255,.07) 100%) 0 0/5px 100%;
  -webkit-mask-image:radial-gradient(70% 55% at 50% 0%, #000, transparent);
          mask-image:radial-gradient(70% 55% at 50% 0%, #000, transparent);
}

.wrap{width:min(1080px,100% - 2rem); margin-inline:auto; position:relative}
a{color:var(--azure); text-decoration:none}
a:hover{text-decoration:underline}

/* ---------- the liquid-glass pane ---------- */
.glass, .panel{
  position:relative; background:var(--glass); border:1px solid var(--line);
  border-radius:var(--r); box-shadow:var(--shadow);
  -webkit-backdrop-filter:var(--blur); backdrop-filter:var(--blur);
  overflow:hidden; isolation:isolate;
}
/* specular sweep — the "wet" highlight that makes glass read as liquid */
.glass::before, .panel::before{
  content:""; position:absolute; inset:-40% -60%; z-index:-1; pointer-events:none;
  background:linear-gradient(115deg, transparent 38%, rgba(255,255,255,.16) 48%, transparent 58%);
  transform:translateX(-30%); animation:sheen 9s ease-in-out infinite;
}
@keyframes sheen{0%,72%{transform:translateX(-45%)}100%{transform:translateX(45%)}}

/* ---------- header ---------- */
header{position:sticky; top:0; z-index:40; border-bottom:1px solid var(--line);
  background:color-mix(in srgb, var(--bg) 62%, transparent);
  -webkit-backdrop-filter:blur(18px) saturate(150%); backdrop-filter:blur(18px) saturate(150%)}
.bar{display:flex; align-items:center; gap:1.5rem; height:70px}
.brand{display:flex; align-items:center; gap:.65rem; font-weight:800; letter-spacing:-.02em;
  font-size:1.15rem; color:var(--ink); text-decoration:none}
.brand:hover{text-decoration:none}
.brand img{filter:drop-shadow(0 0 10px rgba(111,210,255,.65))}
nav{margin-left:auto; display:flex; gap:1.6rem; font-size:.95rem; font-weight:500; color:var(--muted)}
nav a{color:inherit; position:relative}
/* scaleX, not `right` — animating an offset lays out and paints every frame */
nav a::after{content:""; position:absolute; left:0; right:0; bottom:-6px; height:1px;
  background:linear-gradient(90deg,var(--azure),var(--pink));
  transform:scaleX(0); transform-origin:left center; transition:transform .25s ease}
nav a:hover{color:var(--ink); text-decoration:none}
nav a:hover::after{transform:scaleX(1)}
@media(max-width:720px){nav{display:none}}

/* ---------- buttons ---------- */
.btn{
  font:inherit; font-weight:700; cursor:pointer; text-decoration:none; position:relative;
  border:1px solid transparent; padding:.62rem 1.3rem; border-radius:999px;
  transition:transform .18s ease, box-shadow .18s ease, filter .18s ease; white-space:nowrap;
}
.btn:hover{text-decoration:none}
.btn-primary{color:#fff; border-color:rgba(255,255,255,.28);
  background:linear-gradient(135deg, var(--blue), var(--violet) 62%, var(--pink));
  box-shadow:0 8px 26px -8px var(--blue), inset 0 1px 0 rgba(255,255,255,.4)}
.btn-primary:hover{transform:translateY(-2px); filter:brightness(1.12);
  box-shadow:0 12px 32px -8px var(--violet), inset 0 1px 0 rgba(255,255,255,.55)}
.btn-ghost{color:var(--ink); background:var(--glass); border-color:var(--line);
  -webkit-backdrop-filter:var(--blur); backdrop-filter:var(--blur);
  box-shadow:inset 0 1px 0 var(--edge)}
.btn-ghost:hover{background:var(--glass-hi); border-color:var(--azure); transform:translateY(-1px)}
.btn:focus-visible{outline:2px solid var(--azure); outline-offset:3px}

/* ---------- hero ---------- */
.hero{display:grid; grid-template-columns:1.12fr .88fr; gap:3rem; align-items:center; padding:5rem 0 4.5rem}
@media(max-width:860px){.hero{grid-template-columns:1fr; gap:2.5rem; padding:3rem 0 2rem}}
.eyebrow{display:inline-flex; align-items:center; gap:.5rem; font-size:.74rem; font-weight:700;
  letter-spacing:.18em; text-transform:uppercase; color:var(--azure);
  background:var(--glass); border:1px solid var(--line); padding:.38rem .9rem; border-radius:999px;
  -webkit-backdrop-filter:var(--blur); backdrop-filter:var(--blur);
  box-shadow:inset 0 1px 0 var(--edge)}
.jp{display:block; margin-top:1.2rem; font-size:.82rem; letter-spacing:.42em; color:var(--pink);
  text-transform:none; opacity:.85}
h1{font-size:clamp(1.65rem,4vw,2.75rem); line-height:1.12; letter-spacing:-.03em; font-weight:800;
  margin:.55rem 0 .9rem; text-shadow:0 0 40px rgba(59,157,255,.35)}
h1 em{font-style:normal; background:linear-gradient(110deg, var(--azure), var(--violet) 48%, var(--pink));
  -webkit-background-clip:text; background-clip:text; color:transparent;
  filter:drop-shadow(0 0 22px rgba(157,123,255,.45))}
.lede{font-size:.98rem; color:var(--muted); max-width:46ch; font-weight:300}
.cta{display:flex; gap:.75rem; margin-top:1.9rem; flex-wrap:wrap}

/* the rotating diamond — kept as-is, now with a glow and a slow float */
.mark{display:grid; place-items:center; position:relative}
.mark svg{width:min(340px,80%); height:auto; animation:float 7s ease-in-out infinite;
  filter:drop-shadow(0 0 34px rgba(59,157,255,.55)) drop-shadow(0 22px 44px rgba(2,6,20,.6))}
@keyframes float{0%,100%{transform:translateY(-8px)}50%{transform:translateY(8px)}}
.mark .ring{transform-origin:50% 50%; animation:spin 26s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.bubble{position:absolute; top:4%; right:2%; font-size:.82rem; font-weight:700; color:var(--ink);
  padding:.5rem .9rem; border-radius:999px 999px 999px 4px;
  background:var(--glass-hi); border:1px solid var(--line); box-shadow:var(--shadow);
  -webkit-backdrop-filter:var(--blur); backdrop-filter:var(--blur);
  animation:float 5.5s ease-in-out infinite}
.bubble b{color:var(--pink)}

/* sparkle motes */
.sparks{position:absolute; inset:0; pointer-events:none; overflow:hidden}
.sparks i{position:absolute; width:5px; height:5px; border-radius:50%; background:var(--azure);
  box-shadow:0 0 10px 2px var(--azure); opacity:0; animation:mote 6s ease-in-out infinite}
.sparks i:nth-child(2){left:18%; top:70%; background:var(--pink); box-shadow:0 0 10px 2px var(--pink); animation-delay:.8s}
.sparks i:nth-child(3){left:72%; top:22%; animation-delay:1.7s}
.sparks i:nth-child(4){left:88%; top:64%; background:var(--violet); box-shadow:0 0 10px 2px var(--violet); animation-delay:2.6s}
.sparks i:nth-child(5){left:42%; top:12%; animation-delay:3.4s}
.sparks i:nth-child(6){left:60%; top:86%; background:var(--pink); box-shadow:0 0 10px 2px var(--pink); animation-delay:4.3s}
.sparks i:first-child{left:8%; top:28%}
@keyframes mote{
  0%,100%{opacity:0; transform:translateY(0) scale(.5)}
  35%{opacity:.95; transform:translateY(-14px) scale(1)}
  70%{opacity:0; transform:translateY(-30px) scale(.6)}
}

/* ---------- sections ---------- */
section{padding:3rem 0}
.h2{font-size:1.4rem; font-weight:800; letter-spacing:-.02em; margin:0 0 .3rem}
.h2 span{color:var(--pink); font-size:.72rem; letter-spacing:.35em; font-weight:700;
  display:block; margin-bottom:.35rem; opacity:.85}
.sub{color:var(--muted); margin:0 0 1.6rem; font-weight:300}
.split{display:grid; grid-template-columns:minmax(0,1fr) 340px; gap:1.5rem; align-items:start}
@media(max-width:920px){.split{grid-template-columns:1fr}}

/* ---------- game ---------- */
.game{padding:1.2rem}
.hud{display:flex; align-items:center; gap:.6rem; margin-bottom:1.1rem; flex-wrap:wrap}
.chip{display:inline-flex; align-items:center; gap:.4rem; color:var(--ink);
  font:700 .95rem/1 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  background:var(--glass); border:1px solid var(--line); box-shadow:inset 0 1px 0 var(--edge);
  -webkit-backdrop-filter:var(--blur); backdrop-filter:var(--blur);
  padding:.58rem .85rem; border-radius:11px; min-width:5.3rem; justify-content:center}
#mines{color:var(--pink)}
#timer{color:var(--azure)}
select{font:inherit; font-weight:500; padding:.52rem .7rem; border-radius:11px; color:var(--ink);
  border:1px solid var(--line); background:var(--glass); margin-left:auto;
  -webkit-backdrop-filter:var(--blur); backdrop-filter:var(--blur)}
select option{background:var(--bg-2); color:var(--ink)}
@media(max-width:560px){select{margin-left:0}}
#flagBtn[aria-pressed="true"]{color:#fff; border-color:transparent;
  background:linear-gradient(135deg,var(--violet),var(--pink));
  box-shadow:0 6px 20px -6px var(--pink), inset 0 1px 0 rgba(255,255,255,.4)}

.board{display:grid; gap:3px; margin-inline:auto; touch-action:manipulation; width:max-content; max-width:100%}
.cell{
  width:var(--c,32px); height:var(--c,32px); border-radius:7px; padding:0; cursor:pointer;
  border:1px solid var(--line); background:var(--cell);
  box-shadow:inset 0 1px 0 var(--edge), 0 2px 8px rgba(2,6,20,.35);
  font:700 clamp(12px, calc(var(--c) * .52), 18px)/1 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  color:var(--ink); display:grid; place-items:center;
  transition:background .14s, transform .07s, box-shadow .14s;
}
.cell:hover:not(.open){background:var(--glass-hi); box-shadow:inset 0 1px 0 var(--edge), 0 0 16px rgba(111,210,255,.45)}
.cell:active:not(.open){transform:scale(.92)}
.cell.open{background:var(--cell-open); border-color:transparent; box-shadow:none; cursor:default}
.cell.flag{color:var(--pink); text-shadow:0 0 12px var(--pink)}
.cell.boom{background:var(--danger); color:#fff; border-color:transparent;
  box-shadow:0 0 22px var(--danger); animation:pop .35s ease}
@keyframes pop{0%{transform:scale(.6)}60%{transform:scale(1.18)}100%{transform:scale(1)}}
.cell:focus-visible{outline:2px solid var(--azure); outline-offset:-3px}
.n1{color:var(--azure)}.n2{color:var(--mint)}.n3{color:var(--pink)}.n4{color:var(--violet)}
.n5{color:#ffb547}.n6{color:#4fd8e8}.n7{color:#c79bff}.n8{color:var(--muted)}
.cell.open[class*="n"]{text-shadow:0 0 10px currentColor}
.status{text-align:center; margin-top:1.1rem; font-weight:700; color:var(--muted); min-height:1.6em}
.status.win{color:var(--mint); text-shadow:0 0 16px var(--mint)}
.status.lose{color:var(--danger); text-shadow:0 0 16px var(--danger)}

/* ---------- leaderboard ---------- */
.lb{padding:1.2rem}
.lb h3{margin:0 0 .2rem; font-size:1.05rem}
.lb > p{margin:0 0 .9rem; font-size:.85rem; color:var(--muted)}
table{width:100%; border-collapse:collapse; font-size:.92rem}
th{text-align:left; font-size:.68rem; letter-spacing:.14em; text-transform:uppercase; color:var(--muted);
  font-weight:700; padding:.4rem .5rem; border-bottom:1px solid var(--line)}
th.r{text-align:right}
td{padding:.55rem .5rem; border-bottom:1px solid var(--line)}
tr:last-child td{border-bottom:0}
td.rank{font:700 .9rem 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace; color:var(--muted); width:2.4rem}
td.time{text-align:right; font:700 .9rem 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace; color:var(--azure)}
tbody tr:nth-child(1) td.rank{color:var(--pink); text-shadow:0 0 12px var(--pink)}
tr.me td{background:linear-gradient(90deg, rgba(157,123,255,.22), transparent)}
tr.me td.rank{color:var(--violet)}

/* ---------- feature cards ---------- */
.grid3{display:grid; grid-template-columns:repeat(auto-fit,minmax(230px,1fr)); gap:1rem}
.card{padding:1.5rem; transition:transform .22s ease, border-color .22s ease}
.card:hover{transform:translateY(-4px); border-color:var(--azure)}
.card svg{width:26px; height:26px; color:var(--azure); margin-bottom:.7rem;
  filter:drop-shadow(0 0 10px rgba(111,210,255,.7))}
.card h3{margin:0 0 .35rem; font-size:1.02rem}
.card p{margin:0; font-size:.92rem; color:var(--muted); font-weight:300}

footer{border-top:1px solid var(--line); margin-top:3rem; padding:2rem 0; color:var(--muted); font-size:.88rem}
.foot{display:flex; gap:1rem; justify-content:space-between; flex-wrap:wrap}

/* ---------- login modal ---------- */
dialog{border:0; padding:0; color:var(--ink); background:transparent;
  width:min(410px,calc(100% - 2rem))}
dialog::backdrop{background:rgba(4,8,22,.62); -webkit-backdrop-filter:blur(6px); backdrop-filter:blur(6px)}
dialog[open]{animation:rise .3s cubic-bezier(.2,.9,.3,1)}
@keyframes rise{from{opacity:0; transform:translateY(14px) scale(.97)}}
.modal{padding:1.9rem; position:relative; border-radius:var(--r);
  background:var(--glass-hi); border:1px solid var(--line);
  box-shadow:0 30px 80px -20px rgba(2,6,20,.85), inset 0 1px 0 var(--edge);
  -webkit-backdrop-filter:var(--blur); backdrop-filter:var(--blur)}
.modal img{filter:drop-shadow(0 0 14px rgba(111,210,255,.7))}
.modal h2{margin:.8rem 0 .3rem; font-size:1.2rem; letter-spacing:-.02em}
.modal .sub{font-size:.92rem; margin-bottom:1.4rem}
label{display:block; font-size:.78rem; font-weight:700; margin-bottom:.35rem; letter-spacing:.04em}
input{width:100%; font:inherit; padding:.72rem .9rem; border-radius:11px; color:var(--ink);
  border:1px solid var(--line); background:rgba(255,255,255,.06); margin-bottom:.9rem}
input::placeholder{color:var(--muted); opacity:.7}
input:focus{outline:0; border-color:var(--azure); background:rgba(255,255,255,.1);
  box-shadow:0 0 0 3px rgba(111,210,255,.2)}
.err{color:var(--danger); font-size:.85rem; font-weight:500; min-height:1.3em; margin:0 0 .7rem}
.modal .btn{width:100%}
.modal-x{position:absolute; top:.9rem; right:1rem; border:0; background:0; font-size:1.5rem;
  line-height:1; color:var(--muted); cursor:pointer;
  /* not Outfit: the webfont has no reliable glyph for the multiplication sign */
  font-family:ui-sans-serif, system-ui, -apple-system, sans-serif}
.modal-x:hover{color:var(--ink)}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation:none !important; transition:none !important}
}