/* Futoshiki Signs: home, the bar, the board, the number pad. Light and calm;
   big numbers, signs drawn as firm chevrons that point at the smaller one. */
:root{--line:#1E2B45;--cellbg:#FFFFFF;--given:#17212E;--entry:#17786F;--sel:#FFE7A3;--peer:#EAF2F0;--same:#CFE7E3;--sign:#1E2B45}

/* ------------------------------------------------------------------ home */
.home{align-items:center;justify-content:center;gap:1.1em;padding:1em;text-align:center;overflow:auto}
.home-head{display:flex;flex-direction:column;align-items:center;gap:.35em}
.home-icon{width:4.2em;height:4.2em;border-radius:1em;box-shadow:0 6px 18px rgba(30,43,69,.2)}
.title{font:800 clamp(2.1em,8.6vw,3.3em)/1 var(--sans);letter-spacing:-.01em;margin:0;color:var(--ink)}
.tagline{margin:0;color:var(--ink-soft);font-size:1.1em}
.home-body{display:flex;flex-direction:column;align-items:center;gap:.8em;width:min(30em,100%)}
.levels{display:grid;grid-template-columns:repeat(5,1fr);width:min(29em,100%)}
.levels .choice{display:flex;flex-direction:column;align-items:center;justify-content:center;line-height:1.15;min-width:0;padding:.45em .3em}
.levels .choice b{font-size:.92em}
.levels .choice small{font-size:.75em;opacity:.85;font-weight:500}
.links{display:flex;gap:.2em;justify-content:center;flex-wrap:wrap}
.home > :first-child{margin-top:auto}.home > :last-child{margin-bottom:auto}
@media (max-width:520px){.levels{grid-template-columns:repeat(3,1fr)}}
@media (orientation:landscape) and (max-height:520px){
  .home{flex-direction:row;gap:1.4em;padding:.6em 1em}
  .home > *{margin-block:auto!important}
  html:not(.hw-embed) body:has(#home:not([hidden])) #home.home{padding-top:.6em!important}
  .home-head{flex:0 1 auto;padding-top:2.6em}
  html.hw-embed .home-head{padding-top:0}
  .home-icon{width:3em;height:3em}
  .title{font-size:2em}
  .home-body{gap:.5em;flex:0 1 24em}
  .levels{grid-template-columns:repeat(5,1fr)}
  .levels .choice{padding:.3em .2em}
  .home .pill{padding:.5em 2em}
  .links .link{min-height:44px;padding:.2em .5em}
}
@media (max-height:420px){.tagline{display:none}}

/* ---------------------------------------------------------------- game */
#game{flex-direction:column}
.bar{display:flex;align-items:center;justify-content:space-between;gap:.6em;padding:max(.5em,env(safe-area-inset-top)) .7em .3em;width:min(36em,100%);margin:0 auto}
.felt{flex:1;min-height:0;min-width:0;display:grid;place-items:center;padding:6px;position:relative}
.side{display:flex;flex-direction:column;align-items:center;gap:.45em;padding:.3em .6em max(.6em,env(safe-area-inset-bottom))}
.icon-btn{width:48px;height:48px;border-radius:14px;border:1px solid var(--hair);background:var(--panel);display:grid;place-items:center;padding:0;flex:none}
.icon-btn svg,.tool svg,.readout svg{width:24px;height:24px;fill:none;stroke:var(--ink);stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.readout{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:48px;padding:0 .9em;border-radius:14px;background:var(--panel);border:1px solid var(--hair);line-height:1.1}
.readout span{font-weight:800;font-size:1.1em}
.readout small{color:var(--ink-soft);font-size:.8em}
.readout.clock{flex-direction:row;gap:.35em;min-width:5.2em;font-variant-numeric:tabular-nums}
.readout.clock svg{width:20px;height:20px;stroke:var(--ink-soft)}
.dock{display:flex;align-items:center;justify-content:center;gap:.5em}
.tool{display:flex;align-items:center;gap:.35em;min-height:48px;padding:0 .85em;border-radius:14px;border:1px solid var(--hair);background:var(--panel);font-weight:700}
.tool:disabled{opacity:.42;cursor:default}
.tool[aria-pressed=true]{background:var(--accent);color:#fff;border-color:var(--accent-lo)}
.tool[aria-pressed=true] svg{stroke:#fff}
.tool:active:not(:disabled),.icon-btn:active,.key:active{transform:translateY(1px)}
.icon-btn:focus-visible,.tool:focus-visible,.key:focus-visible,.board:focus-visible{outline:3px solid var(--accent-hi);outline-offset:3px}
.busy{position:absolute;inset:0;display:grid;place-items:center;color:var(--ink-soft);font-weight:700;font-size:1.1em}

/* the number pad: one big row under the board */
.pad{display:grid;grid-template-columns:repeat(var(--n,4),1fr);gap:.4em;width:min(32em,100%)}
.key{min-height:54px;border-radius:14px;border:1px solid var(--hair);background:var(--panel);font:800 1.6em/1 var(--sans);color:var(--ink);
  box-shadow:0 2px 0 var(--hair);padding:0;display:grid;place-items:center;transition:background .12s,opacity .2s}
.key.on{background:var(--same);border-color:var(--accent)}
.key.full{opacity:.4}
.pad.noting .key{color:var(--accent);font-size:1.15em;font-weight:700;background:#F2FAF8}
@media (hover:hover){.key:hover{background:#F1F7F6}}

/* the board: squares on a grid, signs in the gaps between them */
.board{--cs:44px;--gap:20px;position:relative;display:grid;
  touch-action:none;user-select:none;-webkit-user-select:none;outline:none;border-radius:10px}
.board .cell{position:relative;display:grid;place-items:center;cursor:pointer;background:var(--cellbg);border:2px solid #C3CCD6;border-radius:calc(var(--cs)*.16);
  box-shadow:0 2px 0 #D5DCE4;transition:background .12s,border-color .12s}
.board .cell.given{background:#EEF1F4}
.board .cell.peer{background:var(--peer)}
.board .cell.given.peer{background:#E2EAE8}
.board .cell.same{background:var(--same)}
.board .cell.sel{background:var(--sel);border-color:#E0A82E;box-shadow:0 0 0 3px rgba(224,168,46,.35)}
.cell .num{font:800 calc(var(--cs)*.58)/1 var(--sans);color:var(--entry);font-variant-numeric:tabular-nums}
.cell.given .num{color:var(--given)}
.board .cell.bad{border-color:var(--bad)}
.board .cell.bad .num{color:var(--bad)}
.cell .marks{display:grid;grid-template-columns:repeat(3,1fr);width:92%;height:92%;font:700 calc(var(--cs)*.24)/1 var(--sans);color:var(--ink-soft)}
.cell .marks i{display:grid;place-items:center;font-style:normal}
.cell.pop .num{animation:npop .24s cubic-bezier(.3,1.6,.5,1)}
@keyframes npop{from{transform:scale(.35)}}
.cell.shake,.sign.shake{animation:shake .32s}
@keyframes shake{20%{translate:-4px 0}40%{translate:4px 0}60%{translate:-3px 0}80%{translate:2px 0}}
.cell.glow{animation:glow 1s ease-out}
@keyframes glow{0%{box-shadow:0 0 0 calc(var(--cs)*.3) rgba(255,209,102,.9)}100%{box-shadow:0 0 0 0 rgba(255,209,102,0)}}
.cell.ripple{animation:ripple .5s ease-out}
@keyframes ripple{0%{background:#BFE8DF}40%{transform:scale(1.08);background:#9EDBCF}100%{transform:scale(1)}}
.cell.win{animation:wave .6s ease-out both}
.cell.win .num{color:var(--accent-lo)}
@keyframes wave{0%{transform:none}35%{transform:translateY(calc(var(--cs)*-.18)) scale(1.06);background:#BFE8DF}100%{transform:none;background:#DDF2EE}}

.sign{display:grid;place-items:center;pointer-events:none}
.sign svg{width:calc(var(--gap)*1.05);height:calc(var(--gap)*1.05);fill:none;stroke:var(--sign);stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;transition:stroke .15s}
.sign.pr svg{transform:rotate(180deg)}
.sign.pu svg{transform:rotate(90deg)}
.sign.pd svg{transform:rotate(-90deg)}
.sign.ok svg{stroke:var(--accent-hi)}
.sign.bad svg{stroke:var(--bad);stroke-width:2.1}

#fx{position:fixed;inset:0;width:100%;height:100%;pointer-events:none;z-index:30}

/* a phone on its side, or a short frame: the bar at the left, pad at the right */
@media (orientation:landscape) and (max-height:520px){
  #game{flex-direction:row}
  .bar{flex-direction:column;justify-content:center;width:auto;margin:0;padding:.5em .3em .5em max(.6em,env(safe-area-inset-left));gap:.5em}
  .readout{min-width:6.4em}
  .side{justify-content:center;padding:.4em max(.6em,env(safe-area-inset-right)) .4em .3em;width:auto}
  .pad{grid-template-columns:repeat(4,52px);width:auto}
  .key{min-height:48px;font-size:1.4em}
  .dock{display:grid;grid-template-columns:1fr 1fr;gap:.4em;width:100%}
  .tool{justify-content:center;padding:0 .5em;min-height:44px}
}
@media (max-width:400px){.tool span{display:none}.tool{padding:0 1em}}
@media (orientation:portrait) and (max-width:400px){.dock{gap:.6em}}

/* cards */
.card.result h2{color:var(--accent)}
.card .brand{font-weight:700;color:var(--ink)}
.row .time{font-weight:800;font-variant-numeric:tabular-nums}
.how p{margin:.25em 0}
.how-art{display:grid;place-items:center;margin:.1em 0 .6em}
.mini{--cs:2.1em;--gap:1em;display:grid;grid-template-columns:var(--cs) var(--gap) var(--cs) var(--gap) var(--cs);grid-template-rows:var(--cs) var(--gap) var(--cs) var(--gap) var(--cs)}
.mini .cell{display:grid;place-items:center;background:#fff;border:2px solid #C3CCD6;border-radius:.35em}
.mini .num{font-size:1.25em;color:var(--given)}
@media (max-height:420px){.how-art{display:none}}
@media (max-height:520px){
  .card{padding:.8em 1em .8em;width:min(34em,100%)}
  .card h2{font-size:1.3em;margin:0 0 .35em}
  .card .actions{flex-direction:row;flex-wrap:wrap;justify-content:center;margin-top:.5em}
  .card .actions .pill{padding:.45em 1.4em;font-size:1.05em}
  .card .stats{margin:.1em 0 .2em}
  .card .note{margin:.15em 0}
  .how{display:grid;grid-template-columns:1fr 1fr;column-gap:1.2em;font-size:.92em}
  .how .note{grid-column:1/-1}
  .rows{gap:.35em}
  .card .row{min-height:44px;padding:.35em .8em}
}