/* Shared shell: the page remains navigable while a puzzle is running. */
.app-layout{--navigation-width:208px;--header-height:72px;min-height:100dvh;display:flex;flex-direction:column}
.app-layout .header{display:flex;flex-wrap:nowrap;align-items:center;position:sticky;top:0;height:var(--header-height);min-height:var(--header-height);padding:0 28px 0 0;gap:18px;z-index:50;background:var(--bg)}
.app-layout .header .brand{width:var(--navigation-width);flex-shrink:0;justify-content:center;gap:10px;font-size:23px;white-space:nowrap}
.app-layout .header .brand-mark{display:flex;align-items:center;justify-content:center;margin:0;flex-shrink:0}
.app-layout .brand>.brand-name{color:var(--text)}
.app-layout .brand-name>span{color:var(--amber)}
.app-layout .header-right{margin-left:auto;gap:12px}
.app-layout .header-language select{min-width:108px}
.app-layout .header-language select{background:#252828;border:1px solid #474c4c;color:#fff;color-scheme:dark}
.app-layout>.main{box-sizing:border-box;width:calc(100% - var(--navigation-width));max-width:none;margin:0 0 0 var(--navigation-width);padding:34px clamp(24px,3vw,56px) 48px;flex:1 0 auto;min-width:0}
.app-sidebar{position:fixed;left:0;top:var(--header-height);bottom:0;width:var(--navigation-width);padding:28px 16px;z-index:30;border-right:1px solid var(--border);background:var(--bg);overflow-y:auto;display:flex;flex-direction:column;gap:18px}
.sidebar-heading{padding:0 12px;display:flex;align-items:center;justify-content:space-between}
.sidebar-caption{font-size:10px;font-weight:700;letter-spacing:.16em;color:var(--muted)}
.app-sidebar .sidebar-nav{display:flex;flex-direction:column;gap:7px}
.app-sidebar .nav-button{border:1px solid transparent;width:100%;display:flex;align-items:center;gap:12px;padding:13px 14px;text-align:left;font-size:13px;color:#a6aaa7;text-decoration:none;border-radius:9px;background:transparent;cursor:pointer}
.app-sidebar .nav-button svg,.sidebar-resume svg{width:20px;height:20px;flex-shrink:0}
.app-sidebar .nav-button svg{fill:none;stroke:currentColor;stroke-width:1.65;stroke-linecap:round;stroke-linejoin:round}
.app-sidebar .nav-button:hover{background:var(--panel-light);color:var(--text)}
.app-sidebar .nav-button.current{background:#efb36312;border-color:#efb36326;color:var(--amber)}
.sidebar-resume{border:1px solid #c2e88030;border-radius:9px;background:#c2e88009;color:var(--lime);display:flex;align-items:center;gap:12px;padding:13px 14px;font-size:12px;line-height:1.4;cursor:pointer;text-align:left}
.icon-button{display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;width:40px;height:40px;border:1px solid var(--border);border-radius:9px;background:var(--panel);color:var(--muted);cursor:pointer}
.icon-button svg{width:19px;height:19px}
.icon-button:hover{color:var(--text);border-color:#646863;background:var(--panel-light)}
.icon-button:disabled{opacity:.4;cursor:default}
.navigation-toggle,#navigation-close{display:none}
.navigation-backdrop{position:fixed;inset:var(--header-height) 0 0;z-index:55;background:#0008;backdrop-filter:blur(3px)}
.app-layout :is(button,a,input,select,summary,canvas):focus-visible{outline:2px solid var(--amber);outline-offset:4px}
.app-layout [hidden]{display:none!important}
.app-layout .page-footer{width:100%;max-width:none;margin:auto 0 0;box-sizing:border-box;background:#171919;border-top:1px solid var(--border);padding:26px 28px;position:relative;z-index:40;gap:0}
.app-layout .footer-bottom{border:0;padding:0;display:flex;align-items:center;justify-content:space-between;gap:24px;width:100%;max-width:none}
.footer-signature{display:flex;align-items:center;gap:20px;white-space:nowrap}
.app-layout .footer-brand{font-size:19px;letter-spacing:-.6px;text-decoration:none}
.app-layout .footer-brand{display:inline-flex;align-items:center;gap:9px}
.footer-brand .brand-mark{width:29px;height:29px;margin:0;color:#181b1b;border-radius:8px}
.footer-brand .brand-mark svg{width:19px;height:19px}
.app-layout .footer-brand>.brand-name{color:var(--text)}
.footer-brand .brand-name>span{color:var(--amber)}
.app-layout .abandon-button,#logout-button{background:#f18c8115;border-color:#f18c8155;color:var(--danger)}
.app-layout .abandon-button:hover,#logout-button:hover{background:#f18c8128;border-color:var(--danger)}
.app-layout .records-button{background:var(--amber);border-color:var(--amber);color:#1d201b}
.arena-status-group{display:flex;align-items:center;gap:12px;min-width:0}
.arena-status-group>div{display:flex;align-items:center;gap:9px}
.app-layout .battle-leave{width:30px;height:30px;border-radius:7px}
.battle-leave svg{width:16px;height:16px}
.prepare-settings .guest-nickname{display:grid;gap:5px;margin-bottom:18px}
.prepare-settings .guest-nickname input{width:100%;background:var(--bg);border-color:var(--border);color:var(--text);margin:0}
.prepare-settings .guest-nickname small{font-size:10px;color:var(--muted);font-weight:400}
.prepare-settings #setup-form>.setting-switch{margin-bottom:16px}
.app-layout .lobby-bots .setting-switch{grid-column:1/-1;display:flex;align-items:center;justify-content:space-between;gap:16px;margin:0;padding:8px 0;color:var(--text);font-size:11px;cursor:pointer}
.app-layout .lobby-bots .setting-switch input{flex-shrink:0}
.footer-signature small{font-size:10px;color:var(--muted);letter-spacing:.03em}
.app-layout .footer-links{justify-content:flex-end;gap:9px 20px}
.app-layout .footer-links a{font-size:11px;color:#a0a7a0;letter-spacing:0}
.app-layout .footer-links a:hover{color:var(--text)}

/* Artwork preparation */
.app-layout .prepare-back{margin:0 0 16px;color:var(--muted);font-size:12px}
.app-layout .prepare-heading{margin-bottom:20px}
.app-layout .prepare-heading h1{font-size:clamp(28px,3vw,39px);letter-spacing:-1.3px;margin:10px 0 8px;line-height:1.15;outline:none}
.app-layout #prepare-image-credit{color:var(--muted);font-size:13px;margin:0}
.app-layout .prepare-layout{grid-template-columns:minmax(0,1fr) minmax(320px,370px);gap:26px;align-items:start}
.prepare-art-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}
.app-layout .prepare-art-tag{position:static;border:0;background:transparent;color:var(--muted);padding:0;font-size:9px;letter-spacing:.13em}
.app-layout #setup-preview{font-size:11px;color:var(--muted)}
.app-layout .prepare-art{background:radial-gradient(ellipse at center,#292b28 0%,#191b1b 75%);border:1px solid var(--border);border-radius:14px;min-height:340px;padding:26px;box-shadow:inset 0 0 50px #0002}
.app-layout .prepare-art img{height:clamp(340px,51vh,570px);max-height:none;object-fit:contain;filter:drop-shadow(0 10px 24px #0005)}
.app-layout .prepare-settings{background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:24px}
.app-layout .prepare-settings>h2{display:flex;align-items:center;gap:10px;font-size:17px;margin:0 0 22px;letter-spacing:-.3px}
.prepare-settings>h2 svg{width:18px;height:18px;color:var(--amber)}
.app-layout .prepare-settings .form-grid{margin:0 0 20px;gap:16px;grid-template-columns:1fr}
.app-layout .prepare-settings label{color:#c2c7c1;font-size:12px}
.app-layout .prepare-settings :is(select,input[type=number]){background:var(--bg);border:1px solid var(--border);border-radius:8px;min-height:44px;color:var(--text)}
.app-layout .prepare-settings .piece-count-setting select{font-size:15px;font-weight:700;margin-top:8px;width:100%}
.piece-presets{display:flex;gap:7px;margin-top:-7px;grid-column:1/-1}
.piece-presets button{border:1px solid var(--border);border-radius:6px;background:transparent;color:var(--muted);flex:1;min-height:30px;cursor:pointer;font-size:11px}
.piece-presets button:hover,.piece-presets button[aria-pressed=true]{color:var(--amber);border-color:#efb36365;background:#efb3630a}
.classic-options{display:grid;gap:10px;margin-bottom:18px}
.app-layout .prepare-settings .setting-switch{display:grid;grid-template-columns:20px minmax(0,1fr) 34px;gap:12px;align-items:center;border:1px solid var(--border);border-radius:9px;background:transparent;padding:13px;margin:0;cursor:pointer}
.setting-switch>svg{width:19px;height:19px;color:var(--muted);fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.setting-switch>span{grid-column:2;grid-row:1;min-width:0;color:var(--text);font-size:12px;font-weight:600}
.app-layout .setting-switch small{display:block;font-size:10px;line-height:1.55;font-weight:400;color:var(--muted);margin-top:3px}
.app-layout .setting-switch input{appearance:none;grid-column:3;grid-row:1;margin:0;width:34px;height:20px;border:1px solid #4b504b;border-radius:12px;background:#303530;cursor:pointer;position:relative;transition:background .15s}
.setting-switch input:before{content:'';width:12px;height:12px;border-radius:50%;background:#b9bfb6;position:absolute;left:3px;top:3px;transition:transform .15s}
.app-layout .setting-switch input:checked{background:var(--amber);border-color:var(--amber)}
.setting-switch input:checked:before{transform:translateX(14px);background:#1d201b}
.setting-switch:has(input:checked){border-color:#efb36355}
.app-layout .prepare-settings .time-estimate{border:0;border-top:1px solid var(--border);background:transparent;border-radius:0;padding:15px 0 0;margin:0 0 10px;font-size:12px;line-height:1.5;color:var(--text)}
.app-layout .prepare-settings .small-copy{font-size:10px;color:var(--muted);line-height:1.7}
.app-layout .prepare-settings #setup-submit{min-height:47px;border-radius:9px;margin-top:16px;font-size:13px}
.app-layout .prepare-settings .puzzle-records-menu{margin:20px 0 0;border:0;border-top:1px solid var(--border);border-radius:0;background:transparent}
.app-layout .puzzle-records-menu>summary{padding:17px 0 0;min-height:35px;font-size:12px;color:#b7c2aa}
.app-layout .puzzle-records-menu[open]>.puzzle-records-content{padding:17px 0 0}
.app-layout #prepare-caption{color:var(--muted);font-size:11px;margin:14px 0 0}
.app-layout .prepare-settings .setup-categories{margin-top:0;margin-bottom:20px}

/* One compact game bar, using server-confirmed progress and time. */
.app-layout #puzzle-view>.page-heading{margin-bottom:22px;align-items:center;gap:18px}
.app-layout #puzzle-view h1{font-size:clamp(23px,2.5vw,32px);letter-spacing:-.8px;line-height:1.2;margin-top:9px}
.app-layout #puzzle-view h1>span{display:none}
.app-layout .classic-actions{display:flex;gap:9px;align-items:center}
.app-layout .classic-actions .button{height:40px;gap:8px;border-radius:9px}
.classic-actions svg{width:16px;height:16px}
.abandon-button:hover{color:#ed968a;border-color:#ed968a70}
.classic-workspace .metrics{display:none!important}
.app-layout .classic-workspace{grid-template-columns:minmax(0,1fr)}
.app-layout .classic-workspace .arena{border-radius:12px;overflow:hidden}
.classic-workspace .arena-top{display:grid;grid-template-columns:1fr auto 1fr;gap:16px;align-items:center;min-height:57px;padding:14px 20px}
.classic-workspace #puzzle-spec{display:none}
.classic-board-progress{display:flex;align-items:baseline;gap:7px;font-size:15px;font-weight:700;color:var(--text);font-variant-numeric:tabular-nums}
.classic-progress-label{font-size:10px;font-weight:400;color:var(--muted)}
.classic-board-timer{display:flex;align-items:center;justify-content:flex-end;gap:8px;color:var(--amber);font:600 14px var(--font);font-variant-numeric:tabular-nums}
.classic-board-timer svg{height:16px;width:16px;color:var(--muted);fill:none;stroke:currentColor;stroke-width:1.7}
.classic-workspace .save-status{margin:0;border:0;border-bottom:1px solid #c2e88026;background:#c2e8800b;padding:10px 20px;display:flex;align-items:center;justify-content:space-between;gap:14px;font-size:11px;line-height:1.5;color:#b6c59f;letter-spacing:0}
.save-status button{border:0;background:transparent;color:var(--lime);font:600 11px var(--font);white-space:nowrap;cursor:pointer;padding:3px 0;text-decoration:underline;text-underline-offset:3px}
.classic-workspace .arena-footer{min-height:48px;padding:10px 18px;gap:15px;background:var(--panel)}
.classic-workspace .arena-footer>span:first-child{display:none}
.classic-workspace .arena-footer .zoom-controls{margin-left:auto}
.classic-workspace .arena-footer .text-button{font-size:11px}

@media(min-width:1400px){.app-layout .prepare-settings{position:sticky;top:96px}.app-layout .prepare-layout{grid-template-columns:minmax(0,1fr) 390px}}
@media(max-width:1100px){.app-layout{--navigation-width:180px}.app-layout>.main{padding-left:24px;padding-right:24px}.app-layout .prepare-layout{grid-template-columns:minmax(0,1fr) 320px;gap:20px}.app-layout .prepare-settings{padding:20px}.app-layout .prepare-art{padding:18px}.app-layout .footer-bottom{flex-wrap:wrap}.app-layout .footer-links{justify-content:flex-start}}
@media(max-width:900px){
 .app-layout{--navigation-width:0px;--header-height:66px}
 .app-layout .header{padding:0 20px;gap:12px}
 .app-layout .header .brand{width:auto}
 .navigation-toggle,#navigation-close{display:inline-flex}
 .app-sidebar{width:240px;z-index:60;visibility:hidden;transform:translateX(-100%);transition:transform .18s ease,visibility .18s}
 .app-sidebar.is-open{visibility:visible;transform:translateX(0)}
 .sidebar-heading{padding:0 8px}
 .app-layout>.main{width:100%;margin-left:0;padding:28px 24px 40px}
 .app-layout .prepare-layout{grid-template-columns:minmax(0,1fr) minmax(300px,340px)}
 .app-layout .prepare-art img{height:380px}
 .app-layout .page-footer{padding:24px}
}
@media(max-width:700px){
 .app-layout .header{padding:0 14px;gap:10px}
 .app-layout .header .brand{font-size:20px;gap:8px}
 .app-layout .header .brand-mark{width:32px;height:32px}
 .app-layout .header-right{gap:8px}
 .app-layout .prepare-layout{grid-template-columns:1fr;gap:22px}
 .app-layout .prepare-art{min-height:0;padding:20px}
 .app-layout .prepare-art img{height:300px}
 .app-layout .prepare-settings .form-grid{grid-template-columns:1fr 1fr}
 .piece-count-setting{grid-column:1/-1}
 .app-layout .prepare-settings{padding:22px}
 .app-layout #puzzle-view>.page-heading{margin-bottom:16px}
 .app-layout #puzzle-view h1{font-size:25px}
 .classic-workspace .arena-top{gap:9px;padding:13px 14px}
 .classic-progress-label{display:none}
 .classic-board-progress{font-size:14px}
 .classic-workspace .save-status{padding:10px 14px;flex-wrap:wrap;gap:4px 12px}
 .classic-workspace .arena-footer{padding:9px 12px;gap:11px;flex-wrap:wrap}
 .app-layout .footer-signature{justify-content:space-between;width:100%}
 .app-layout .footer-links{gap:9px 17px}
}
@media(max-width:520px){
 .app-layout>.main{padding:24px 16px 32px}
 .app-layout .header .brand-name{display:none}
 .app-layout .header .brand{gap:0}
 .app-layout .header-right{gap:7px}
 .app-layout .header-language select{min-width:78px;width:78px;font-size:10px;padding:9px 6px}
 .app-layout .header .guest-account-button{font-size:10px;min-height:36px;padding:8px 10px;max-width:145px;white-space:normal}
 .app-layout .header .icon-button{width:32px;height:34px}
 .app-layout .page-footer{padding:22px 16px}
 .app-layout .footer-bottom{gap:18px}
 .app-layout .prepare-heading h1{font-size:30px}
 .app-layout .prepare-settings .form-grid{grid-template-columns:1fr}
 .app-layout .classic-actions .button{font-size:0;width:38px;padding:0}
 .classic-actions .button svg{width:17px;height:17px}
 .classic-workspace .arena-top{grid-template-columns:1fr auto;gap:8px}
 .classic-board-timer{grid-column:1/-1;justify-content:flex-start;padding-top:7px;border-top:1px solid var(--border)}
}
@media(prefers-reduced-motion:reduce){.app-sidebar,.setting-switch input,.setting-switch input:before{transition:none}}