:root{color-scheme:dark;--bg:#191a20;--surface:#222329;--raised:#292b32;--line:#3b3d46;--text:#f5f2e9;--muted:#b9bac3;--accent:#f6ae6b;--accent-strong:#e69048;--blue:#819dda;font-family:system-ui,-apple-system,"Segoe UI",sans-serif}
*{box-sizing:border-box}
html{min-width:280px;background:var(--bg)}
body{margin:0;background:radial-gradient(circle at 78% -15%,#303040 0,transparent 40%),var(--bg);color:var(--text);font-size:16px;line-height:1.5}
button,input,select{font:inherit}
button{cursor:pointer}
button:disabled{opacity:.55;cursor:wait}
a{color:inherit}
:focus-visible{outline:3px solid var(--blue);outline-offset:3px}
[hidden]{display:none!important}
.skip{position:absolute;left:-9999px;top:0;z-index:3;padding:12px 16px;background:var(--text);color:var(--bg)}
.skip:focus{left:8px}
.shell{max-width:1100px;min-height:100dvh;margin:auto;padding:0 clamp(18px,4vw,48px);display:flex;flex-direction:column}
.topbar{min-height:84px;display:flex;justify-content:space-between;align-items:center;gap:20px;border-bottom:1px solid var(--line)}
.brand{display:flex;gap:12px;align-items:center;font-size:18px;font-weight:700;letter-spacing:-.03em;white-space:nowrap}
.brand strong{color:var(--accent)}
.brand-mark{width:34px;height:34px;padding:5px;display:grid;grid-template-columns:1fr 1fr;gap:3px;border:1px solid var(--accent);border-radius:8px;transform:rotate(-9deg)}
.brand-mark span{background:var(--accent);border-radius:2px}
.brand-mark span:nth-child(2),.brand-mark span:nth-child(3){opacity:.42}
.stage-tag{border:1px solid #66523e;background:#33291f;color:#ffd6ad;padding:6px 10px;border-radius:6px;font-size:12px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;text-align:center}
main{width:100%;flex:1;padding-bottom:72px}
.intro{padding:clamp(45px,8vw,92px) 0 38px;max-width:750px}
.eyebrow{margin:0 0 10px;color:var(--accent);font-size:12px;font-weight:800;letter-spacing:.17em;text-transform:uppercase}
h1,h2,h3,p{margin-top:0}
h1,h2,h3{line-height:1.1;letter-spacing:-.045em}
h1{font-size:clamp(38px,6.2vw,70px);margin-bottom:20px;font-weight:770}
h1 span{color:var(--accent)}
.intro>p:last-child{max-width:650px;color:var(--muted);font-size:clamp(16px,1.8vw,19px);margin:0}
h2{font-size:clamp(25px,3vw,34px)}
h3{font-size:22px}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:12px}
.choice{padding:clamp(20px,3vw,32px)}
.choice h2{margin-bottom:22px}
.choice-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.choice-card{width:100%;min-height:124px;border:1px solid var(--line);border-radius:8px;background:var(--raised);display:flex;align-items:center;gap:16px;padding:20px;text-align:left;text-decoration:none;color:var(--text);transition:border-color .15s,background-color .15s}
.choice-card:hover{background:#34363f;border-color:#767986}
.choice-card.online{background:#37302c;border-color:#815e42}
.choice-card.online:hover{background:#44372f}
.choice-icon{flex:0 0 42px;width:42px;height:42px;border-radius:8px;display:grid;place-items:center;background:#41444d;color:var(--text);font-size:24px}
.online .choice-icon{background:#784c2f;color:#fff}
.choice-card strong{display:block;font-size:18px;line-height:1.25;letter-spacing:-.025em}
.choice-card small{display:block;color:var(--muted);font-size:14px;margin-top:7px;line-height:1.35}
.choice-card .arrow{margin-left:auto;align-self:flex-start;color:var(--accent);font-size:24px;line-height:1}
.consent{max-width:690px;margin-top:32px;padding:clamp(24px,4vw,40px)}
.consent h2{margin-bottom:18px}
.consent>p:not(.eyebrow){color:var(--muted);font-size:17px}
.action-row{display:flex;gap:12px;margin:24px 0 8px}
.button{min-height:48px;padding:11px 19px;border-radius:7px;border:1px solid var(--line);font-weight:700;text-decoration:none;text-align:center;display:inline-flex;align-items:center;justify-content:center;gap:8px;line-height:1.25}
.button.primary{background:var(--accent);color:#23180f;border-color:var(--accent)}
.button.primary:hover{background:#ffbf85;border-color:#ffbf85}
.button.secondary{background:#31333b;color:var(--text)}
.button.secondary:hover{background:#40434d}
.button.full{width:100%}
.text-button{border:0;min-height:44px;background:transparent;color:#d1d4e0;text-decoration:underline;text-underline-offset:4px;padding:10px 4px;font-weight:650}
.text-button:hover{color:white}
.lobby{padding-top:30px}
.section-heading{display:flex;justify-content:space-between;align-items:end;gap:16px}
.section-heading h2{margin-bottom:0}
.section-note{color:var(--muted);max-width:660px;margin:14px 0 27px}
.notice{background:#2b3544;border:1px solid #627da3;border-left:4px solid var(--blue);border-radius:6px;color:#e6edff;padding:12px 15px;margin-bottom:20px}
label,.field-label{display:block;font-size:14px;font-weight:700;margin-bottom:8px}
input,select{display:block;width:100%;min-height:48px;padding:11px 13px;border:1px solid #666976;border-radius:6px;background:#191b21;color:var(--text);outline:none}
input:focus,select:focus{border-color:var(--blue);box-shadow:0 0 0 3px #819dda44}
input::placeholder{color:#979ba7}
.setup>input{max-width:430px}
.help{font-size:13px;color:var(--muted);margin:8px 0 18px}
.split{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:26px}
.inner{padding:24px;display:flex;flex-direction:column}
.inner h3{margin-bottom:8px}
.inner>p:not(.help){color:var(--muted);margin-bottom:24px}
.inner .button{margin-top:auto}
.inner input,.inner select{margin-bottom:17px}
.inner .help{margin-top:-9px}
.table{max-width:660px;padding:28px}
.table-heading{display:flex;justify-content:space-between;gap:15px;align-items:center}
.table-heading h3{margin-bottom:5px}
.status-dot{height:12px;width:12px;flex:0 0 12px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 5px #f6ae6b22}
.table-status{color:var(--muted);margin:12px 0 20px}
.invite{background:#181a20;border:1px solid var(--line);border-radius:8px;padding:18px;margin:22px 0}
.code-row{display:flex;gap:10px;align-items:center}
.code-row output{display:block;flex:1;color:var(--accent);font-size:clamp(22px,5vw,34px);font-weight:800;letter-spacing:.16em;line-height:1.3}
.code-row .button{white-space:nowrap}
.invite .help{margin:8px 0 0}
.players{display:flex;gap:10px;flex-wrap:wrap;margin:22px 0}
.player{min-width:120px;padding:10px 13px;border:1px solid var(--line);border-radius:6px;background:var(--raised);font-weight:650}
.player small{display:block;color:var(--muted);font-size:12px;font-weight:500}
.game-area{margin:22px 0;padding:16px;background:#181a20;border:1px solid var(--line);border-radius:8px;max-width:100%;min-width:0}
.game-area h4{font-size:17px;letter-spacing:-.02em;margin:0 0 6px}
.game-hint{min-height:1.5em;color:#f4d0ae;font-size:14px;margin-bottom:13px}
.board-legend{color:var(--muted);font-size:13px;margin-bottom:10px}
.visual-grid{width:100%;max-width:420px;margin:0 auto;display:grid;gap:2px;background:#39383b;border:2px solid #5b5755;padding:2px;border-radius:6px}
.visual-grid.columns-8{grid-template-columns:repeat(8,minmax(0,1fr))}
.visual-grid.columns-7{grid-template-columns:repeat(7,minmax(0,1fr))}
.visual-cell{min-width:0;aspect-ratio:1;display:grid;place-items:center;background:#292d36;color:#f6bb7b;font-size:clamp(15px,5vw,25px);line-height:1;font-weight:750}
.visual-cell.dark-square{background:#49505a}
.visual-cell.p1{color:#ffce8b}
.visual-cell.p2{color:#a9c7ef}
.visual-cell.legal-square{box-shadow:inset 0 0 0 2px #ffbf7f;color:#ffbf7f;font-size:22px}
.reversi .visual-cell{background:#244c42;border-radius:2px}
.reversi .visual-cell.p1,.reversi .visual-cell.p2{color:#ecdec4}
.reversi .visual-cell.p2{color:#15202a}
.drop-four .visual-cell{border-radius:50%;background:#141f2b;border:2px solid #355072}
.drop-four .visual-cell.p1{background:#ffb676;color:transparent}
.drop-four .visual-cell.p2{background:#a3bff2;color:transparent}
.play-grid.tic-board{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:6px;max-width:330px;margin:auto}
.tic-board button,.tic-board .static-square{min-width:0;min-height:70px;aspect-ratio:1;border:1px solid #606878;background:#323945;border-radius:6px;color:#ffc38b;font-size:40px;font-weight:800;display:grid;place-items:center}
.tic-board button:hover{border-color:var(--accent);background:#3c4756}
.tic-board .static-square{background:#252a33;color:#f5bf8e}
.move-picker{margin-top:14px}
.move-heading{font-size:14px;margin:16px 0 8px;color:var(--muted)}
.move-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px}
.move-grid.compact{grid-template-columns:repeat(4,minmax(0,1fr))}
.move-option{min-width:0;min-height:46px;padding:8px 5px;border:1px solid #697385;border-radius:6px;background:#303844;color:var(--text);font-size:13px;font-weight:700;line-height:1.2;overflow-wrap:anywhere}
.move-option:hover{background:#475261;border-color:var(--accent)}
.move-option:disabled{opacity:.55}
.mancala-board{display:grid;gap:7px;max-width:420px;margin:auto;padding:12px 7px;border-radius:30px;background:#65452e;border:2px solid #a07346}
.pit-row{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:4px}
.pit{min-width:0;min-height:44px;border:1px solid #c89462;border-radius:50%;background:#3c2a20;color:#ffe0b9;display:grid;place-items:center;font-weight:800}
.pit.opponent{background:#262b36;color:#c2d4ed}
button.pit{border:2px solid #ffd397;box-shadow:0 0 0 2px #33251b}
.morris-map{position:relative;display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:1px;max-width:420px;margin:auto;background:linear-gradient(90deg,transparent 49%,#7f7969 49%,#7f7969 51%,transparent 51%),linear-gradient(transparent 49%,#7f7969 49%,#7f7969 51%,transparent 51%),#3d342f;border:3px solid #8b6d4c;border-radius:8px;padding:5px;aspect-ratio:1}
.morris-map::before,.morris-map::after,.morris-inner-ring{content:"";position:absolute;border:2px solid #827664;pointer-events:none;z-index:0}
.morris-map::before{inset:7%}
.morris-map::after{inset:21%}
.morris-inner-ring{inset:35%;display:block!important}
.morris-map span{min-width:0;display:grid;place-items:center;font-size:11px;font-weight:800}
.morris-map span:not(.morris-inner-ring){z-index:1}
.morris-point{align-self:center;justify-self:center;width:min(100%,31px);aspect-ratio:1;border-radius:50%;border:2px solid #e5ccaa;background:#282628;color:#f9e7d2}
.morris-point.p1{background:#f2bb7e;color:#241813}
.morris-point.p2{background:#a9c7ef;color:#132337}
.dots-map{display:grid;grid-template-columns:repeat(9,minmax(0,1fr));max-width:360px;margin:auto;aspect-ratio:1;background:#243a42;border:2px solid #43616b;border-radius:6px;padding:5px}
.dots-map span{min-width:0;display:grid;place-items:center;color:#a5c5cc;line-height:1}
.dots-dot{font-size:28px;color:#fff1d4!important}
.dots-line{font-size:22px}
.dots-line.drawn{color:#ffbd7b!important;font-weight:900}
.dots-owner{font-size:15px;font-weight:850;color:#ffcc8e!important}
.table-actions{display:grid;gap:10px}
.footnote{color:#9295a1;font-size:13px;margin-top:24px}
footer{display:flex;justify-content:space-between;gap:16px;color:#8e909b;padding:20px 0;border-top:1px solid var(--line);font-size:13px}
@media(max-width:670px){.topbar{min-height:73px}.stage-tag{font-size:10px}.intro{padding:48px 0 30px}.choice-grid,.split{grid-template-columns:1fr}.choice-card{min-height:104px}.action-row{flex-direction:column}.action-row .button{width:100%}.inner{padding:20px}.code-row{align-items:stretch;flex-direction:column}.code-row .button{width:100%}.table{padding:20px}}
@media(max-width:360px){.shell{padding:0 14px}.brand{font-size:16px}.brand-mark{width:30px;height:30px}.choice-card{padding:15px;gap:11px}.choice-icon{flex-basis:38px;width:38px;height:38px}.choice-card strong{font-size:16px}.stage-tag{max-width:100px;line-height:1.2}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;animation-duration:.01ms!important;transition-duration:.01ms!important}}