/* Layout and components shared by the trainer pages (index.html has its own layout and only uses tokens.css).
   Page-specific rules stay in a <style> block inside the page. */

/* base */
:root{color-scheme:light;box-sizing:border-box;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
html{scroll-padding-top:env(safe-area-inset-top,0px)}
body{margin:0;padding:0;font:14px -apple-system,BlinkMacSystemFont,sans-serif;background:#fff;color:#000}
img{max-width:100%}
[hidden]:not([hidden=until-found i]){display:none!important}

/* Layout: one narrow working column between two cross-stitch bands; the exercise card is the only raised surface. */
*{box-sizing:border-box}
body{background:var(--bg);color:var(--ink);font-family:var(--font-ui);font-size:var(--fs-md);line-height:1.5}
.wrap{max-width:44rem;margin:0 auto;padding-inline:16px;padding-block:20px 56px;display:flex;flex-direction:column;gap:22px}
[lang="uk"]{font-family:var(--font-uk)}
button{font:inherit;color:inherit;cursor:pointer}
button:focus-visible,input:focus-visible,a:focus-visible{outline:2px solid var(--red);outline-offset:2px}

/* header */
.back{align-self:flex-start;color:var(--muted);font-size:var(--fs-sm);text-decoration:none}
.back:hover{color:var(--ink);text-decoration:underline;text-underline-offset:3px}
.top{display:flex;flex-direction:column;gap:14px}
.stitch{display:block;width:100%;height:14px}
.sa{fill:var(--gold)} .sb{fill:var(--blue)}
.top h1{margin:0;font-family:var(--font-uk);font-weight:600;font-size:clamp(1.75rem,5vw + .6rem,2.5rem);line-height:1.1;text-wrap:balance;letter-spacing:-.01em}
.top p{margin:0;color:var(--muted);font-size:var(--fs-sm);max-width:60ch}
.head-row{display:flex;justify-content:space-between;align-items:flex-start;gap:12px}
.seg.lang{flex-shrink:0}
.head-tools{display:flex;gap:8px;flex-shrink:0;align-items:flex-start}
.theme-btn{display:flex;align-items:center;justify-content:center;min-width:44px;min-height:34px;padding:5px 10px;border:1px solid var(--line);border-radius:6px;background:var(--surface);color:var(--blue);cursor:pointer}
.theme-btn:hover{border-color:var(--blue)}
.seg.lang button{display:flex;align-items:center;min-height:34px;padding:5px 10px}
.flag{display:block;border-radius:2px;box-shadow:0 0 0 1px var(--line)}

/* tabs */
.tabs{display:flex;gap:24px;border-bottom:1px solid var(--line)}
.tab{background:none;border:0;padding:8px 0 10px;font-weight:500;color:var(--muted);border-bottom:2px solid transparent;margin-bottom:-1px}
.tab[aria-selected="true"]{color:var(--ink);border-bottom-color:var(--red)}

/* controls */
.controls{display:flex;flex-direction:column;gap:12px}
.label{font-size:var(--fs-xs);text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-weight:500}
.seg{display:flex;flex-wrap:wrap;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--surface);width:fit-content;max-width:100%}
.seg button{background:none;border:0;border-right:1px solid var(--line);padding:9px 14px;font-size:var(--fs-sm);min-height:42px}
.seg button:last-child{border-right:0}
.seg button[aria-pressed="true"]{background:var(--ink);color:var(--bg)}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{background:none;border:1px solid var(--line);border-radius:999px;padding:6px 13px;font-size:var(--fs-sm);color:var(--muted);min-height:36px}
.chip[aria-pressed="true"]{border-color:var(--ink);color:var(--ink);background:var(--surface)}
.chip[aria-pressed="true"]::before{content:"✓ ";font-size:.85em}

/* card */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px clamp(16px,4vw,28px) 24px;display:flex;flex-direction:column;gap:18px;min-width:0}
.card-head{display:flex;justify-content:space-between;gap:12px;align-items:baseline}
.base{display:flex;flex-wrap:wrap;align-items:baseline;gap:6px 12px}
.base .word{font-family:var(--font-uk);font-size:var(--fs-lg);font-weight:600}
.base .gloss{color:var(--muted);font-size:var(--fs-sm)}
.sentence{font-family:var(--font-uk);font-size:clamp(1.45rem,3.6vw + .7rem,2.05rem);line-height:1.35;margin:0;text-wrap:balance;overflow-wrap:anywhere}
.gap{display:inline-block;min-width:3.4em;border-bottom:2px dashed var(--red);text-align:center;line-height:1.15}
.gap.solved{border-bottom-style:solid;border-bottom-color:var(--ink);font-weight:600;min-width:0;padding:0 .08em}
.gap.solved.ok{color:var(--green);border-bottom-color:var(--green)}
.de{margin:0;color:var(--muted);font-size:var(--fs-sm)}
.sentence-block{display:flex;flex-direction:column;gap:8px}
.sentence-block .say{align-self:flex-start}

.answer{display:flex;flex-direction:column;gap:12px}
.type-row{display:flex;gap:10px;flex-wrap:wrap}
.type-row input{flex:1 1 12rem;min-width:0;font-family:var(--font-uk);font-size:1.25rem;padding:9px 12px;border:1px solid var(--line);border-radius:var(--radius);background:var(--field);color:var(--ink);min-height:48px}
.btn{background:var(--ink);color:var(--bg);border:1px solid var(--ink);border-radius:var(--radius);padding:10px 20px;font-weight:600;min-height:48px}
.btn:disabled{opacity:.45;cursor:default}
.link{background:none;border:0;padding:4px 0;color:var(--muted);font-size:var(--fs-sm);text-decoration:underline;text-underline-offset:3px}
.tools{display:flex;gap:18px;flex-wrap:wrap;align-items:center}
.hint{margin:0;font-size:var(--fs-sm);color:var(--ink);border-left:2px solid var(--line);padding-left:10px}

.kb{display:flex;flex-wrap:wrap;gap:5px}
.kb button{font-family:var(--font-uk);font-size:1.05rem;min-width:2.1em;height:2.3em;padding:0 4px;background:var(--field);border:1px solid var(--line);border-radius:4px}
.kb button:active{background:var(--line)}
.kb .wide{font-family:var(--font-ui);font-size:var(--fs-sm);padding:0 10px}

.opts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.opt{display:flex;align-items:center;gap:10px;text-align:left;background:var(--field);border:1px solid var(--line);border-radius:var(--radius);padding:11px 14px;min-height:54px;font-family:var(--font-uk);font-size:1.25rem;overflow-wrap:anywhere}
.opt .n{font-family:var(--font-ui);font-size:var(--fs-xs);color:var(--muted);border:1px solid var(--line);border-radius:3px;min-width:1.6em;text-align:center;line-height:1.5;flex:none}
.opt:disabled{cursor:default;color:var(--muted)}
.opt.right{border-color:var(--green);background:var(--green-soft);color:var(--ink)}
.opt.wrong{border-color:var(--red);background:var(--red-soft);color:var(--ink);text-decoration:line-through}

.fb{border-radius:var(--radius);padding:14px 16px;display:flex;flex-direction:column;gap:10px;background:var(--green-soft)}
.fb.bad{background:var(--red-soft)}
.fb .verdict{font-weight:600;color:var(--green);margin:0}
.fb.bad .verdict{color:var(--red)}
.fb p{margin:0;font-size:var(--fs-sm)}
.fb .uk{font-family:var(--font-uk);font-size:1.1rem;font-weight:600}
.fb s{font-family:var(--font-uk);font-size:1.1rem;color:var(--muted)}
.fb .rule-t{font-weight:600}
.fb .btn{align-self:flex-start;margin-top:2px}

/* stats */
.stats{display:flex;flex-direction:column;gap:14px}
.nums{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:0}
.nums div{display:flex;flex-direction:column;gap:2px;min-width:0}
.nums dt{font-size:var(--fs-xs);color:var(--muted)}
.nums dd{margin:0;font-size:var(--fs-lg);font-weight:600;font-variant-numeric:tabular-nums}
.bar{height:6px;background:var(--line);border-radius:3px;overflow:hidden}
.bar i{display:block;height:100%;background:var(--ink);width:0;transition:width .3s}
.prog{display:flex;flex-direction:column;gap:6px;font-size:var(--fs-sm);color:var(--muted)}
.prog-row{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;align-items:baseline}

/* rules */
.rules{display:flex;flex-direction:column;gap:30px}
.rules section{display:flex;flex-direction:column;gap:10px}
.rules h2{margin:0;font-size:var(--fs-lg);font-weight:600;text-wrap:balance}
.rules p{margin:0;max-width:65ch}
.tbl{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface)}
.rules table{border-collapse:collapse;width:100%;min-width:30rem;font-size:var(--fs-sm)}
.rules th,.rules td{text-align:left;padding:9px 12px;border-bottom:1px solid var(--line);vertical-align:top}
.rules tr:last-child td{border-bottom:0}
.rules th{font-size:var(--fs-xs);text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-weight:500}
.rules td[lang="uk"],.rules span[lang="uk"]{font-size:1.02rem}
.rules b{font-weight:600;color:var(--red)}
.rules ul{margin:0;padding-left:1.2em;display:flex;flex-direction:column;gap:6px;max-width:65ch}

/* read aloud */
.say{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;flex:none;padding:0;border:1px solid var(--line);border-radius:999px;background:var(--surface);color:var(--muted);vertical-align:middle}
.say:hover{color:var(--ink);border-color:var(--ink)}
.say svg{display:block}
.say-note{margin:0;font-size:var(--fs-sm);color:var(--ink);border-left:2px solid var(--red);padding-left:10px;max-width:65ch}
.no-tts .say,.no-tts .say-ui{display:none!important}

@media (max-width:30rem){
  .nums{grid-template-columns:repeat(2,minmax(0,1fr))}
  .kb button{min-width:1.95em}
}
@media (prefers-reduced-motion:reduce){.bar i{transition:none}}

/* Ukrainian theme: muted flag blue for interaction, wheat gold for ornament; red/green stay reserved for feedback. */
body::before{content:"";display:block;height:8px;background:linear-gradient(var(--blue) 0 50%,var(--gold) 50% 100%)}
button:focus-visible,input:focus-visible,a:focus-visible{outline-color:var(--blue)}
.stitch-end{margin-top:12px}
.tab[aria-selected="true"]{border-bottom-color:var(--blue)}
.seg button[aria-pressed="true"]{background:var(--blue);color:var(--on-blue)}
.chip[aria-pressed="true"]{border-color:var(--blue);color:var(--blue);background:var(--blue-soft)}
.gap{border-bottom-color:var(--blue)}
.btn{background:var(--blue);border-color:var(--blue);color:var(--on-blue)}
.card{border-top:3px solid var(--gold)}
.nums dd{color:var(--blue)}
.bar{background:var(--blue-soft)}
.bar i{background:linear-gradient(90deg,var(--blue),var(--gold))}
.rules h2::before{content:"";display:inline-block;width:.5em;height:.5em;margin-right:.55em;vertical-align:.12em;background:var(--gold);transform:rotate(45deg)}
.rules b{color:var(--blue)}
.rules th{background:var(--blue-soft);color:var(--ink)}
.say:hover{color:var(--blue);border-color:var(--blue)}
.say-note{border-left-color:var(--gold);background:var(--gold-soft);padding:8px 12px;border-radius:0 var(--radius) var(--radius) 0}