html{-webkit-text-size-adjust:100%}
body{margin:0}
img{max-width:100%}
/* Layout: one working surface. Left = vložit + výsledek (kód v „tabulových“ buňkách), right = QR studio; below = moje odkazy. Left-aligned. */
:root{
  --bg:#EDF0EF; --surface:#FFFFFF; --sunk:#E3E8E7; --ink:#14213A; --muted:#566176; --line:#D3D9DC;
  --mark:#FFD84A; --mark-ink:#14213A; --cell:#14213A; --cell-ink:#FFD84A;
  --ok:#1C7F55; --warn:#9A6514; --bad:#B9362F; --focus:#2C5BD8;
  --f-ui:"Instrument Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --f-code:"Martian Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --r-s:8px; --r-m:14px;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#0D1524; --surface:#152038; --sunk:#0F192C; --ink:#E7ECF3; --muted:#9AA6BA; --line:#26344F;
  --mark:#FFD84A; --mark-ink:#0D1524; --cell:#FFD84A; --cell-ink:#0D1524;
  --ok:#4CC38A; --warn:#E3A940; --bad:#F07167; --focus:#86A8FF; color-scheme:dark }}
:root[data-theme="dark"]{
  --bg:#0D1524; --surface:#152038; --sunk:#0F192C; --ink:#E7ECF3; --muted:#9AA6BA; --line:#26344F;
  --mark:#FFD84A; --mark-ink:#0D1524; --cell:#FFD84A; --cell-ink:#0D1524;
  --ok:#4CC38A; --warn:#E3A940; --bad:#F07167; --focus:#86A8FF; color-scheme:dark }

[hidden]{display:none!important}
*{box-sizing:border-box}
body{background:var(--bg);color:var(--ink);font-family:var(--f-ui);font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased}
button,input,select{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--focus);outline-offset:2px}
.wrap{max-width:1140px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}

header.top{padding-block:20px}
header.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{font-family:var(--f-code);font-weight:700;font-size:15px;display:flex;align-items:center;gap:10px}
.brand i{display:inline-grid;place-items:center;width:28px;height:28px;border-radius:6px;background:var(--cell);color:var(--cell-ink);font-style:normal;font-size:12px}
.top nav{display:flex;gap:4px}
.top nav a{color:var(--muted);text-decoration:none;font-weight:500;padding:6px 10px;border-radius:6px}
.top nav a:hover{color:var(--ink);background:var(--sunk)}

.intro{padding-block:28px 22px}
h1{font-size:clamp(34px,5.4vw,58px);line-height:1.02;letter-spacing:-.025em;font-weight:700;margin:0 0 12px;text-wrap:balance;max-width:16ch}
.intro p{margin:0;color:var(--muted);max-width:56ch;font-size:17px}

/* Shorten form */
.shorten{display:flex;gap:10px;margin-top:26px;flex-wrap:wrap}
.field{position:relative;flex:1 1 420px;min-width:0}
.field input,.strip{width:100%;height:60px;padding:0 18px;border-radius:var(--r-m);font-size:17px;font-family:var(--f-ui)}
.field input{border:1.5px solid var(--line);background:var(--surface);transition:border-color .15s}
.field input:focus{border-color:var(--ink);outline:none;box-shadow:0 0 0 4px color-mix(in srgb,var(--focus) 20%,transparent)}
.strip{position:absolute;inset:0;display:flex;align-items:center;white-space:pre;overflow:hidden;pointer-events:none;border:1.5px solid transparent}
.strip span{display:inline-block;will-change:transform,opacity}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 16px;border-radius:var(--r-s);border:1.5px solid var(--line);background:var(--surface);font-weight:600;cursor:pointer;transition:background .15s,border-color .15s,transform .1s;white-space:nowrap}
.btn:hover{border-color:var(--ink)}
.btn:active{transform:translateY(1px)}
.btn.primary{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.btn.primary:hover{background:color-mix(in srgb,var(--ink) 86%,var(--bg))}
.btn.go{height:60px;padding:0 28px;font-size:17px;border-radius:var(--r-m);background:var(--mark);color:var(--mark-ink);border-color:var(--mark)}
.btn.go:hover{filter:brightness(.96);border-color:var(--mark)}
.btn svg{width:18px;height:18px;flex:none}
.hint{margin-top:10px;font-size:14px;color:var(--muted);display:flex;gap:6px;flex-wrap:wrap;align-items:center}
.linkish{background:none;border:0;padding:0;color:var(--ink);text-decoration:underline;text-underline-offset:3px;cursor:pointer;font-weight:500}
.notice{margin-top:12px;padding:12px 14px;border-radius:var(--r-s);font-size:15px;border:1px solid var(--line);background:var(--surface)}
.notice.err{border-color:color-mix(in srgb,var(--bad) 50%,var(--line));color:var(--bad)}
.notice.dup{border-color:color-mix(in srgb,var(--warn) 55%,var(--line))}
.notice b{font-family:var(--f-code);font-weight:600;font-size:14px;overflow-wrap:anywhere}

/* Work area */
.work{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:20px;padding-block:8px 40px;align-items:start}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-m);padding:24px;min-width:0}
.panel h2{font-size:15px;font-weight:600;margin:0 0 14px;color:var(--muted)}

.result-code{display:flex;align-items:center;gap:10px;flex-wrap:wrap;cursor:pointer;border-radius:var(--r-s);padding:4px;margin:-4px;background:none;border:0;text-align:left}
.result-code .host{font-family:var(--f-code);font-size:clamp(15px,2.2vw,20px);color:var(--muted)}
.cells{display:flex;gap:5px}
/* Flip clock: each cell = upper + lower static half; a flap (upper leaf) falls around the hinge, then the next lower leaf lands */
.cell{--h:clamp(52px,8.4vw,74px);--d:60ms;position:relative;display:block;width:clamp(38px,6.4vw,56px);height:var(--h);border-radius:7px;color:var(--cell-ink);font-family:var(--f-code);font-weight:700;font-size:clamp(22px,3.8vw,34px);perspective:320px}
.cell::after{content:"";position:absolute;left:0;right:0;top:50%;height:2px;margin-top:-1px;background:var(--surface);opacity:.55;z-index:6}
.cell::before{content:"";position:absolute;left:-2px;right:-2px;top:50%;height:6px;margin-top:-3px;z-index:7;background:linear-gradient(90deg,var(--cell) 0 3px,transparent 3px calc(100% - 3px),var(--cell) calc(100% - 3px));border-radius:2px}
.half,.leaf{position:absolute;left:0;right:0;height:50%;overflow:hidden;background:var(--cell);backface-visibility:hidden}
.half b,.leaf b{position:absolute;left:0;right:0;height:var(--h);line-height:var(--h);text-align:center;font-weight:700}
.h-top,.ltop{top:0;border-radius:7px 7px 0 0}
.h-top b,.ltop b{top:0}
.h-bot,.lbot{bottom:0;border-radius:0 0 7px 7px}
.h-bot b,.lbot b{bottom:0}
.h-top{background:linear-gradient(var(--cell),color-mix(in srgb,var(--cell) 88%,#000))}
.ltop{z-index:3;transform-origin:50% 100%;animation:flapDown var(--d) ease-in forwards}
.lbot{z-index:3;transform-origin:50% 0;transform:rotateX(90deg);animation:flapLand var(--d) ease-out var(--d) forwards}
.ltop::after,.lbot::after,.h-bot::after{content:"";position:absolute;inset:0;pointer-events:none;background:#000}
.ltop::after{opacity:0;animation:darken var(--d) ease-in forwards}
.lbot::after{opacity:.45;animation:fade var(--d) ease-out var(--d) forwards}
.h-bot::after{opacity:0;animation:shadow calc(var(--d) * 2) ease-out}
@keyframes flapDown{to{transform:rotateX(-90deg)}}
@keyframes flapLand{to{transform:rotateX(0)}}
@keyframes fade{to{opacity:0}}
@keyframes darken{to{opacity:.45}}
@keyframes shadow{40%{opacity:.35}100%{opacity:0}}
.cell.land .lbot{animation-timing-function:cubic-bezier(.3,1.5,.55,1)}
.copy-tip{font-size:13px;color:var(--muted);margin-left:4px}
.orig{margin-top:14px;font-size:14px;color:var(--muted);overflow-wrap:anywhere}
.orig span{color:var(--ink)}

.ruler{margin-top:20px;display:grid;gap:8px;font-size:13px}
.rrow{display:grid;grid-template-columns:72px minmax(0,1fr) 84px;gap:10px;align-items:center}
.rrow .lab{color:var(--muted)}
.rrow .num{font-family:var(--f-code);font-size:12px;text-align:right;font-variant-numeric:tabular-nums}
.bar{height:12px;border-radius:3px;background:var(--sunk);position:relative;overflow:hidden}
.bar i{position:absolute;inset:0 auto 0 0;border-radius:3px;background-color:var(--ink);background-image:repeating-linear-gradient(90deg,transparent 0 calc(var(--tick) - 1px),color-mix(in srgb,var(--bg) 55%,transparent) calc(var(--tick) - 1px) var(--tick));transition:width .6s cubic-bezier(.2,.8,.2,1)}
.bar.short i{background-color:var(--mark)}
.saving{font-weight:600}

.actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:22px;position:relative}
.share-pop{position:absolute;top:52px;left:0;z-index:5;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-m);padding:8px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:4px;width:min(320px,100%);box-shadow:0 12px 32px -12px color-mix(in srgb,var(--ink) 35%,transparent);transform-origin:top left;animation:pop .18s ease-out}
@keyframes pop{from{opacity:0;transform:scale(.96) translateY(-4px)}}
.share-pop a{display:flex;gap:8px;align-items:center;padding:9px 10px;border-radius:6px;text-decoration:none;color:var(--ink);font-weight:500;font-size:15px}
.share-pop a:hover{background:var(--sunk)}
.share-pop .addr{grid-column:1/-1;font-size:12px;color:var(--muted);padding:6px 10px 2px}

.expiry{margin-top:26px;padding-top:20px;border-top:1px solid var(--line)}
.expiry h3{font-size:15px;margin:0 0 10px;font-weight:600}
.seg{display:flex;flex-wrap:wrap;gap:6px}
.seg button{border:1.5px solid var(--line);background:transparent;border-radius:999px;padding:6px 13px;font-size:14px;font-weight:500;cursor:pointer}
.seg button[aria-pressed="true"]{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.seg button:hover{border-color:var(--ink)}
.date-row{display:flex;gap:8px;align-items:center;margin-top:10px;flex-wrap:wrap}
.date-row input{height:40px;border:1.5px solid var(--line);border-radius:var(--r-s);padding:0 10px;background:var(--surface)}
.exp-status{margin-top:12px;font-size:14px;color:var(--muted)}
.exp-status strong{color:var(--ink);font-weight:600}

/* QR studio */
.qr-stage{display:grid;place-items:center;background:var(--sunk);border-radius:var(--r-s);padding:20px;margin-bottom:18px}
.qr-stage canvas{width:220px;height:220px;max-width:100%;border-radius:6px;image-rendering:pixelated;transition:transform .25s}
.qr-stage canvas.bump{transform:scale(.97)}
.ctl{display:grid;gap:8px;margin-bottom:16px}
.ctl > label,.ctl > .lab{font-size:14px;font-weight:600}
.swatches{display:flex;gap:6px;align-items:center;flex-wrap:wrap}
.sw{width:30px;height:30px;border-radius:50%;border:2px solid var(--line);cursor:pointer;padding:0}
.sw[aria-pressed="true"]{box-shadow:0 0 0 2px var(--surface),0 0 0 4px var(--ink)}
.sw.custom{position:relative;overflow:hidden;background:conic-gradient(#f44,#fd4,#4d8,#4af,#a4f,#f44)}
.sw.custom input{position:absolute;inset:-6px;opacity:0;cursor:pointer}
input[type=range]{width:100%;accent-color:var(--ink)}
.range-row{display:flex;justify-content:space-between;font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}
.warn-line{font-size:13px;color:var(--warn)}
.qr-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:6px}

/* My links */
.mine{padding-block:10px 40px}
.mine-head{display:flex;justify-content:space-between;align-items:baseline;gap:12px;flex-wrap:wrap;margin-bottom:12px}
.mine h2{font-size:24px;margin:0;letter-spacing:-.01em}
.mine-head span{color:var(--muted);font-size:14px}
.rows{display:grid;gap:6px}
.row{display:grid;grid-template-columns:116px minmax(0,1fr) 84px 140px auto;gap:14px;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-s);padding:12px 14px;transition:border-color .2s,background .4s}
.row.active{border-color:var(--ink)}
.row.flash{background:color-mix(in srgb,var(--mark) 32%,var(--surface))}
.row .code{font-family:var(--f-code);font-weight:600;font-size:14px;letter-spacing:.04em}
.row .dest{font-size:14px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;min-width:0}
.row .clicks{font-size:14px;font-variant-numeric:tabular-nums;text-align:right}
.row .clicks small{color:var(--muted)}
.chip{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:500;padding:3px 10px;border-radius:999px;background:var(--sunk);white-space:nowrap;justify-self:start}
.chip::before{content:"";width:7px;height:7px;border-radius:50%;background:currentColor}
.chip.ok{color:var(--ok)} .chip.warn{color:var(--warn)} .chip.bad{color:var(--bad)} .chip.none{color:var(--muted)}
.row .btn{height:34px;padding:0 12px;font-size:14px}
.row-actions{display:flex;gap:6px}


.toast{position:fixed;left:50%;bottom:calc(24px + env(safe-area-inset-bottom,0px));transform:translateX(-50%);background:var(--ink);color:var(--bg);padding:11px 18px;border-radius:999px;font-weight:600;font-size:15px;z-index:20;animation:toast .25s ease-out;max-width:calc(100% - 32px);text-align:center}
@keyframes toast{from{opacity:0;transform:translate(-50%,8px)}}

@media (max-width:900px){
  .work{grid-template-columns:minmax(0,1fr)}
  .row{grid-template-columns:minmax(0,1fr) auto;row-gap:6px}
  .row .dest{grid-column:1/-1;grid-row:2}
  .row .clicks{text-align:left;grid-row:3}
  .row .chip{grid-row:3;justify-self:end}
  .row-actions{grid-column:2;grid-row:1}
}
@media (max-width:520px){
  .top nav{display:none}
  .btn.go{flex:1 1 100%}
  .panel{padding:18px}
  .rrow{grid-template-columns:56px minmax(0,1fr) 72px}
}
/* Při omezeném pohybu vypneme animace kromě jednoho krátkého překlopení tabule s kódem. */
@media (prefers-reduced-motion:reduce){*:not(.leaf),*:not(.leaf)::before,*:not(.leaf)::after{animation:none!important;transition:none!important}}

.sr{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.empty{color:var(--muted);margin:0;padding:18px;border:1px dashed var(--line);border-radius:var(--r-s)}
.btn[disabled]{opacity:.6;cursor:progress}
.status-page{min-height:100vh;display:grid;place-items:center;text-align:center;padding-block:48px}
.status-page .code-big{font-family:var(--f-code);font-size:clamp(40px,9vw,88px);font-weight:700;letter-spacing:.06em;margin:0}
.status-page p{color:var(--muted);max-width:44ch;margin:12px auto 24px}
.status-page a.btn{text-decoration:none;color:inherit}

/* Správa */
a.brand{color:inherit;text-decoration:none}
.top nav .nav-btn{color:var(--muted);text-decoration:none;font-weight:500;padding:6px 10px;border-radius:6px}
.top nav .nav-btn:hover{color:var(--ink);background:var(--sunk)}
code,.snippet{font-family:var(--f-code);font-size:.86em}
.auth{display:grid;place-items:start center;padding-block:40px 64px}
.auth-card{width:min(440px,100%);display:grid;gap:10px}
.auth-card h1{font-size:28px;margin:0 0 4px;max-width:none}
.auth-card p{margin:0 0 6px;color:var(--muted);font-size:15px}
.auth-card label{font-size:14px;font-weight:600;margin-top:4px}
.auth-card input{height:48px;border:1.5px solid var(--line);border-radius:var(--r-s);padding:0 14px;background:var(--surface)}
.auth-card input:focus{border-color:var(--ink);outline:none;box-shadow:0 0 0 4px color-mix(in srgb,var(--focus) 20%,transparent)}
.auth-card .btn.primary{height:48px;margin-top:8px}
.auth-msg{color:var(--bad);font-size:15px;min-height:1.5em}
.snippet{margin:4px 0 8px;padding:12px 14px;background:var(--sunk);border-radius:var(--r-s);white-space:pre-wrap;overflow-wrap:anywhere;font-size:13px}
.dash{padding-block:12px 56px}
.dash-head{display:flex;justify-content:space-between;align-items:end;gap:20px;flex-wrap:wrap;margin-bottom:20px}
.dash-head h1{font-size:clamp(30px,4.4vw,44px);margin:0}
.stats{display:flex;gap:8px;flex-wrap:wrap}
.stats div{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-s);padding:10px 16px;min-width:110px}
.stats b{display:block;font-family:var(--f-code);font-size:22px;font-variant-numeric:tabular-nums}
.stats span{font-size:13px;color:var(--muted)}
.dash-tools{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin-bottom:12px}
.dash-tools input{flex:1 1 320px;height:46px;border:1.5px solid var(--line);border-radius:var(--r-s);padding:0 14px;background:var(--surface)}
.dash-tools input:focus{border-color:var(--ink);outline:none;box-shadow:0 0 0 4px color-mix(in srgb,var(--focus) 20%,transparent)}
.dash-tools span{color:var(--muted);font-size:14px}
.row-wrap{display:grid}
.row a.code{color:inherit;text-decoration:none}
.row a.code:hover{text-decoration:underline;text-underline-offset:3px}
.btn.danger:hover{border-color:var(--bad);color:var(--bad)}
.btn.danger.armed{background:var(--bad);border-color:var(--bad);color:#fff}
.exp-editor{display:flex;gap:14px;align-items:center;flex-wrap:wrap;margin:-2px 0 4px;padding:14px;background:var(--sunk);border:1px solid var(--ink);border-top:0;border-radius:0 0 var(--r-s) var(--r-s);animation:pop .18s ease-out}
.exp-editor .date-row{margin:0;font-size:14px}
.btn.more{margin-top:14px}
.admin .row{grid-template-columns:96px minmax(0,1fr) 84px 140px auto}
@media (max-width:900px){ .admin .row{grid-template-columns:minmax(0,1fr) auto} }
@media (max-width:520px){ .admin .top nav{display:flex} }