/* Fishful Thinking shared styles: color tokens, sticky glass header, deep-water footer. Used by every page. */
:root{--bg:#e9f3f1;--panel:#fff;--ink:#0c2a33;--mute:#4d6b72;--line:#c3d9d6;--accent:#c02c52;--on:#fff;--deep:#0c3b47;--deep2:#14606f;--deep3:#072630;--on-deep:#effbf9;--on-deep-mute:#a7d2d5;--ok:#17794a;--warn:#9a6200;--bad:#b3261e;--sel:#d5ede9;--glass:rgba(255,255,255,.82);--shadow:rgba(12,42,51,.14);--font:"Bricolage Grotesque",system-ui,-apple-system,"Segoe UI",sans-serif;--hdr:64px}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#081a20;--panel:#0f2830;--ink:#e3f2f0;--mute:#8fb0b5;--line:#1f4650;--accent:#ff6f8f;--on:#1a0a10;--deep:#0a3440;--deep2:#0f4a58;--deep3:#05181e;--on-deep:#effbf9;--on-deep-mute:#9cc6ca;--ok:#5fd29a;--warn:#f0b955;--bad:#ff8a80;--sel:#164049;--glass:rgba(10,30,37,.82);--shadow:rgba(0,0,0,.45);color-scheme:dark}}
:root[data-theme="dark"]{--bg:#081a20;--panel:#0f2830;--ink:#e3f2f0;--mute:#8fb0b5;--line:#1f4650;--accent:#ff6f8f;--on:#1a0a10;--deep:#0a3440;--deep2:#0f4a58;--deep3:#05181e;--on-deep:#effbf9;--on-deep-mute:#9cc6ca;--ok:#5fd29a;--warn:#f0b955;--bad:#ff8a80;--sel:#164049;--glass:rgba(10,30,37,.82);--shadow:rgba(0,0,0,.45);color-scheme:dark}
*{box-sizing:border-box}
html{scroll-padding-top:calc(env(safe-area-inset-top,0px) + var(--hdr) + 16px)}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.5 var(--font);-webkit-font-smoothing:antialiased}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:60;background:var(--panel)}
::selection{background:var(--accent);color:var(--on)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--accent);outline-offset:2px}

/* Header: sticky frosted bar */
.site{position:sticky;top:env(safe-area-inset-top,0px);z-index:50;background:var(--glass);-webkit-backdrop-filter:saturate(1.5) blur(14px);backdrop-filter:saturate(1.5) blur(14px);border-bottom:1px solid var(--line)}
.site .in{max-width:1180px;margin:auto;padding-left:max(20px,env(safe-area-inset-left,0px));padding-right:max(20px,env(safe-area-inset-right,0px));padding-block:10px;min-height:var(--hdr);display:flex;align-items:center;gap:8px 16px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.22rem;color:var(--ink);text-decoration:none;letter-spacing:-.02em;white-space:nowrap}
.brand svg{width:34px;height:34px;flex:none;transition:transform .3s ease}
.brand:hover svg{transform:rotate(-8deg) scale(1.06)}
.nav{display:flex;gap:2px;overflow-x:auto;margin-left:auto;scrollbar-width:none;min-width:0;max-width:100%}
.nav::-webkit-scrollbar{display:none}
.nav a{white-space:nowrap;padding:7px 13px;border-radius:99px;color:var(--mute);text-decoration:none;font-weight:600;font-size:.93rem;transition:background-color .15s,color .15s}
.nav a:hover{color:var(--ink);background:var(--sel)}
.nav a[aria-current=page]{background:var(--accent);color:var(--on)}
@media(max-width:760px){.nav{margin-left:0;width:100%}}
@media(prefers-reduced-motion:reduce){.brand svg,.nav a{transition:none}.brand:hover svg{transform:none}}

/* Footer: deep-water band with a wave edge */
.sitefoot{position:relative;margin-top:56px;background:var(--deep3);color:var(--on-deep-mute);font-size:.88rem}
.sitefoot::before{content:"";position:absolute;left:0;right:0;top:-22px;height:23px;background:var(--deep3);-webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 120 23' preserveAspectRatio='none'%3E%3Cpath d='M0 23V12C20 2 40 2 60 12s40 10 60 0v11z' fill='%23000'/%3E%3C/svg%3E") 0 0/120px 23px repeat-x;mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 120 23' preserveAspectRatio='none'%3E%3Cpath d='M0 23V12C20 2 40 2 60 12s40 10 60 0v11z' fill='%23000'/%3E%3C/svg%3E") 0 0/120px 23px repeat-x}
.sitefoot .in{max-width:1180px;margin:auto;padding-left:max(20px,env(safe-area-inset-left,0px));padding-right:max(20px,env(safe-area-inset-right,0px));padding-block:28px 36px;display:flex;justify-content:space-between;align-items:center;gap:10px 24px;flex-wrap:wrap}
.sitefoot p{margin:0;max-width:70ch}
.sitefoot p:last-child{color:var(--on-deep);font-weight:800;font-size:1.05rem;letter-spacing:-.01em}
.sitefoot a{color:var(--on-deep)}

/* Header actions: Tools menu, search, My Tank and the phone menu */
.site .in{position:relative}
.nav{overflow:visible}
.dd{position:relative}
.ddb{appearance:none;border:0;background:none;font:inherit;font-weight:600;font-size:.93rem;color:var(--mute);padding:7px 13px;border-radius:99px;cursor:pointer;display:inline-flex;align-items:center;gap:4px;white-space:nowrap}
.ddb:hover,.dd.open .ddb{color:var(--ink);background:var(--sel)}
.ddb.cur{background:var(--accent);color:var(--on)}
.ddb svg{width:12px;height:12px;transition:transform .15s}
.dd.open .ddb svg{transform:rotate(180deg)}
.ddm{display:none;position:absolute;top:calc(100% + 8px);left:50%;transform:translateX(-50%);min-width:300px;padding:8px;border-radius:16px;background:var(--panel);border:1px solid var(--line);box-shadow:0 18px 40px -14px var(--shadow);z-index:70;flex-direction:column;gap:2px}
.dd.open .ddm{display:flex}
.ddm a{display:flex!important;flex-direction:column;gap:1px;padding:9px 12px!important;border-radius:10px!important;white-space:normal!important}
.ddm a b{color:var(--ink);font-size:.95rem}
.ddm a span{color:var(--mute);font-weight:400;font-size:.82rem}
.ddm a:hover{background:var(--sel)!important}
.ddm a[aria-current=page]{background:var(--sel)!important;color:var(--ink)!important}
.hact{display:flex;align-items:center;gap:4px;margin-left:6px}
.hbtn{appearance:none;border:0;background:none;color:var(--ink);width:40px;height:40px;border-radius:50%;display:grid;place-items:center;cursor:pointer;position:relative;text-decoration:none}
.hbtn:hover{background:var(--sel)}
.hbtn svg{width:21px;height:21px}
.hbtn .cnt{position:absolute;top:2px;right:0;min-width:18px;height:18px;padding:0 5px;border-radius:99px;background:var(--accent);color:var(--on);font-size:.7rem;font-weight:800;display:grid;place-items:center;font-variant-numeric:tabular-nums}
.hbtn.menu{display:none}
.hbtn .cnt[hidden]{display:none}
.pop{position:absolute;right:max(20px,env(safe-area-inset-right,0px));top:calc(100% + 6px);width:min(360px,calc(100vw - 32px));background:var(--panel);border:1px solid var(--line);border-radius:18px;box-shadow:0 20px 44px -16px var(--shadow);z-index:80;padding:16px}
.pop h2{margin:0 0 2px;font-size:1.05rem;font-weight:800}
.pop .sub{margin:0 0 10px;color:var(--mute);font-size:.86rem}
.pop ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:4px;font-size:.9rem}
.pop li{display:flex;justify-content:space-between;gap:10px}.pop li span:last-child{color:var(--mute);font-variant-numeric:tabular-nums;white-space:nowrap}
.pop .tot{display:flex;justify-content:space-between;font-weight:800;margin:10px 0;padding-top:10px;border-top:1px solid var(--line)}
.pop .row2{display:flex;gap:8px;flex-wrap:wrap}
.pop .b1,.pop .b2{flex:1;text-align:center;border-radius:99px;padding:9px 12px;font-weight:700;text-decoration:none;font-size:.9rem}
.pop .b1{background:var(--accent);color:var(--on)}.pop .b2{border:1.5px solid var(--line);color:var(--ink)}
.srch{position:fixed;inset:0;z-index:90;background:rgba(4,20,26,.5);display:flex;justify-content:center;align-items:flex-start;padding:calc(env(safe-area-inset-top,0px) + 70px) 16px 16px}
.srch .box{width:min(640px,100%);max-height:calc(100vh - 110px);display:flex;flex-direction:column;background:var(--panel);border:1px solid var(--line);border-radius:18px;box-shadow:0 24px 60px -20px rgba(0,0,0,.5);overflow:hidden}
.srch .top{display:flex;align-items:center;gap:10px;padding:12px 14px;border-bottom:1px solid var(--line)}
.srch .top svg{width:20px;height:20px;color:var(--mute);flex:none}
.srch input{flex:1;min-width:0;border:0;background:none;font:inherit;font-size:1.08rem;color:var(--ink);padding:6px 0}
.srch input:focus{outline:none}
.srch .x{appearance:none;border:1px solid var(--line);background:var(--bg);color:var(--mute);font:inherit;font-size:.78rem;border-radius:6px;padding:2px 8px;cursor:pointer}
.srch .res{overflow-y:auto;padding:6px 6px 10px}
.srch h3{margin:10px 10px 4px;font-size:.7rem;text-transform:uppercase;letter-spacing:.12em;color:var(--mute)}
.srch a{display:flex;justify-content:space-between;gap:10px;align-items:baseline;padding:8px 10px;border-radius:10px;color:var(--ink);text-decoration:none}
.srch a span{color:var(--mute);font-size:.84rem;text-align:right}
.srch a:hover,.srch a.sel{background:var(--sel)}
.srch .none{padding:16px 12px;color:var(--mute)}
@media(max-width:860px){
 .site .in{flex-wrap:nowrap}
 .hbtn.menu{display:grid}
 .hact{margin-left:auto}
 .site .nav{display:none;position:absolute;left:0;right:0;top:100%;margin:0;width:auto;flex-direction:column;align-items:stretch;gap:2px;padding:10px max(16px,env(safe-area-inset-left,0px)) 16px;background:var(--panel);border-bottom:1px solid var(--line);box-shadow:0 18px 30px -18px var(--shadow);max-height:calc(100vh - var(--hdr) - 10px);overflow-y:auto}
 .site.open .nav{display:flex}
 .site .nav>a,.ddb{padding:11px 12px!important;border-radius:10px!important;font-size:1rem!important}
 .dd{display:flex;flex-direction:column}
 .ddb{pointer-events:none;color:var(--mute)!important;background:none!important;font-size:.74rem!important;text-transform:uppercase;letter-spacing:.12em;padding-bottom:4px!important}
 .ddb svg{display:none}
 .ddm{display:flex;position:static;transform:none;min-width:0;box-shadow:none;border:0;padding:0 0 0 6px;background:none}
}
/* Shared page header: breadcrumb, title and intro */
.phead{margin:0 0 6px}
.phead .crumb{display:flex;gap:6px;flex-wrap:wrap;font-size:.84rem;color:var(--mute);margin:0 0 10px}
.phead .crumb a{color:var(--mute);text-decoration:none;font-weight:600}
.phead .crumb a:hover{color:var(--accent)}
.phead h1{font-size:clamp(2.1rem,5.2vw,3.3rem);line-height:1;margin:0 0 10px;font-weight:800;letter-spacing:-.03em;text-wrap:balance}
.phead .lede{margin:0;color:var(--mute);max-width:68ch;font-size:1.05rem}
.phead .lede a{color:var(--accent);font-weight:600}

/* Tank Theory sub-navigation: switch between the planner and the 3D builder */
.ttnav{display:inline-flex;gap:4px;padding:4px;border-radius:99px;background:var(--panel);border:1px solid var(--line)}
.ttnav a{padding:7px 14px;border-radius:99px;font-weight:700;font-size:.9rem;color:var(--ink);text-decoration:none;white-space:nowrap}
.ttnav a:hover{background:var(--sel)}
.ttnav a[aria-current=page]{background:var(--ink);color:var(--panel)}

/* "My tank" label next to the tank icon on wide screens */
.hbtn .hl{display:none}
@media(min-width:1100px){#htank{width:auto;padding:0 14px 0 10px;border-radius:99px;display:flex;gap:7px;font-weight:700;font-size:.92rem}#htank .hl{display:inline}#htank .cnt{position:static;margin-left:-1px}}

/* Preview notice at the top of every page */
.notice{background:#fff4d6;color:#4a3a06;border-bottom:1px solid #f0d78a;font-size:.86rem;line-height:1.4}
.notice .in{max-width:1180px;margin:auto;padding:8px max(20px,env(safe-area-inset-left,0px));display:flex;gap:10px;align-items:baseline}
.notice b{flex:none;font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;background:#4a3a06;color:#fff4d6;padding:2px 8px;border-radius:99px}
.notice a{color:inherit;font-weight:700;text-decoration:underline;white-space:nowrap}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .notice{background:#3a2f0c;color:#f6e4a6;border-color:#5a4a14}:root:not([data-theme="light"]) .notice b{background:#f6e4a6;color:#3a2f0c}}
:root[data-theme="dark"] .notice{background:#3a2f0c;color:#f6e4a6;border-color:#5a4a14}:root[data-theme="dark"] .notice b{background:#f6e4a6;color:#3a2f0c}