/* Layout: phone-first single column app, tab bar on the bottom, papel-picado color blocks for each language */
:root{
  --bg:#fff6e4; --surface:#ffffff; --ink:#142a4a; --muted:#5f6478; --line:#efdcb8;
  --en:#1a7e96; --en-soft:#d6eff4; --es:#c94a22; --es-soft:#fde2d4;
  --sun:#f5a623; --sun-soft:#ffefc7; --mint:#4f8a5f; --mint-soft:#e0efe2;
  --display:"Bricolage Grotesque",ui-rounded,"Trebuchet MS",sans-serif;
  --body:"Nunito Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#0f1829; --surface:#18243b; --ink:#fbf1de; --muted:#aeb5c7; --line:#2a3854;
  --en:#5cc3da; --en-soft:#163a46; --es:#ff8a5f; --es-soft:#4a2416;
  --sun:#ffc04d; --sun-soft:#44361a; --mint:#8cc79c; --mint-soft:#1d3a27; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0f1829; --surface:#18243b; --ink:#fbf1de; --muted:#aeb5c7; --line:#2a3854;
  --en:#5cc3da; --en-soft:#163a46; --es:#ff8a5f; --es-soft:#4a2416;
  --sun:#ffc04d; --sun-soft:#44361a; --mint:#8cc79c; --mint-soft:#1d3a27; color-scheme:dark}
*{box-sizing:border-box}
body{background:var(--bg);color:var(--ink);font-family:var(--body);font-size:16px;line-height:1.5}
.app{max-width:520px;margin:0 auto;padding:16px 16px 110px;display:flex;flex-direction:column;gap:18px}
h1,h2,h3{font-family:var(--display);margin:0;text-wrap:balance}
button{font:inherit;color:inherit;cursor:pointer}
button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--sun);outline-offset:2px}

.flags{display:flex;height:10px;border-radius:0 0 8px 8px;overflow:hidden;margin:-16px -16px 0}
.flags i{flex:1}.flags i:nth-child(4n+1){background:var(--es)}.flags i:nth-child(4n+2){background:var(--sun)}.flags i:nth-child(4n+3){background:var(--en)}.flags i:nth-child(4n){background:var(--mint)}
header{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.logo{font-size:28px;font-weight:800;letter-spacing:-.02em}
.logo span{color:var(--es)}.logo b{color:var(--en)}

.s1{background:var(--sun-soft)}.s2{background:var(--mint-soft)}.s3{background:var(--es-soft)}

.panel{display:flex;flex-direction:column;gap:14px}
.filters{display:flex;gap:8px;flex-wrap:wrap}
.chip{border:2px solid var(--line);background:var(--surface);border-radius:999px;padding:6px 14px;font-weight:700;font-size:14px}
.chip[aria-pressed="true"]{border-color:var(--ink);background:var(--ink);color:var(--bg)}
.search{width:100%;padding:12px 14px;border-radius:14px;border:2px solid var(--line);background:var(--surface);color:var(--ink);font:inherit}

.word{background:var(--surface);border-radius:20px;padding:14px 16px;display:grid;grid-template-columns:auto 1fr auto;gap:4px 12px;align-items:start;border:2px solid var(--line)}
.lang{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;font-family:var(--display);font-weight:800;font-size:14px;color:#fff}
.lang.en{background:var(--en)}.lang.es{background:var(--es)}
.word h3{font-size:20px}
.word .pos{font-size:13px;color:var(--muted);font-style:italic}
.word p{margin:0;grid-column:2/4;min-width:0}
.word .ex{color:var(--muted);font-size:14px}
.box{font-size:12px;font-weight:700;padding:3px 9px;border-radius:999px;background:var(--mint-soft);color:var(--mint);white-space:nowrap}
.by{font-size:12px;color:var(--muted);grid-column:2/4}

form{display:flex;flex-direction:column;gap:12px;background:var(--surface);padding:16px;border-radius:20px;border:2px solid var(--line)}
label{display:flex;flex-direction:column;gap:4px;font-weight:700;font-size:14px}
input,select,textarea{padding:10px 12px;border-radius:12px;border:2px solid var(--line);background:var(--bg);color:var(--ink);font:inherit;font-weight:400}
.row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.cta{border:0;border-radius:16px;padding:14px;font-family:var(--display);font-weight:800;font-size:18px;background:var(--es);color:#fff}
.note{font-size:13px;color:var(--muted);margin:0}

.card-wrap{perspective:1200px}
.flash{position:relative;height:300px;transform-style:preserve-3d;transition:transform .5s;cursor:pointer}
.flash.flipped{transform:rotateY(180deg)}
.face{position:absolute;inset:0;border-radius:26px;backface-visibility:hidden;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;padding:24px;text-align:center}
.front{background:var(--en);color:#fff}
.front.es{background:var(--es)}
.front h2{font-size:44px}
.back{background:var(--surface);border:3px solid var(--ink);transform:rotateY(180deg)}
.back h3{font-size:26px}
.hint{font-size:13px;opacity:.85;font-weight:700;text-transform:uppercase;letter-spacing:.08em}
.grade{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.grade button{border:0;border-radius:16px;padding:12px 6px;font-weight:800;display:flex;flex-direction:column;align-items:center}
.grade small{font-weight:600;font-size:12px;opacity:.8}
.g1{background:var(--es-soft)}.g2{background:var(--sun-soft)}.g3{background:var(--mint-soft)}
.progress{height:10px;background:var(--line);border-radius:999px;overflow:hidden}
.progress i{display:block;height:100%;background:var(--mint);transition:width .3s}

.prize{background:var(--surface);border:2px solid var(--line);border-radius:20px;padding:14px 16px;display:flex;flex-direction:column;gap:8px}
.prize.ready{border-color:var(--sun);background:var(--sun-soft)}
.prize-top{display:flex;justify-content:space-between;gap:10px;align-items:baseline;flex-wrap:wrap}
.prize h3{font-size:19px}
.goal{font-size:13px;font-weight:700;color:var(--muted)}
.redeem{align-self:flex-start;border:0;border-radius:12px;padding:8px 14px;font-weight:800;background:var(--sun);color:#142a4a}
.redeem:disabled{background:var(--line);color:var(--muted);cursor:not-allowed}

nav{position:fixed;left:0;right:0;bottom:0;background:var(--surface);border-top:2px solid var(--line);padding:8px 8px calc(8px + env(safe-area-inset-bottom,0px));display:flex;justify-content:center}
nav div{display:grid;grid-template-columns:repeat(5,1fr);gap:4px;width:100%;max-width:520px}
nav button{border:0;background:none;border-radius:14px;padding:8px 4px;display:flex;flex-direction:column;align-items:center;gap:2px;font-weight:700;font-size:12px;color:var(--muted)}
nav button svg{width:24px;height:24px}
nav button[aria-current="page"]{background:var(--en-soft);color:var(--en)}
.toast{position:fixed;left:50%;bottom:96px;transform:translateX(-50%);background:var(--ink);color:var(--bg);padding:10px 18px;border-radius:999px;font-weight:700;max-width:calc(100% - 32px)}
.banner{background:var(--sun-soft);border:2px dashed var(--sun);border-radius:14px;padding:8px 12px;font-size:13px;font-weight:600}
@media (prefers-reduced-motion:reduce){.flash{transition:none}}
.word{cursor:pointer;text-align:left;width:100%;font:inherit;color:inherit}
.word:hover{border-color:var(--muted)}
.actions{display:flex;gap:10px;flex-wrap:wrap}
.ghost{border:2px solid var(--line);background:var(--surface);border-radius:16px;padding:12px 16px;font-weight:700}
.danger{color:var(--es);border-color:var(--es-soft)}
.error{color:var(--es);font-weight:700;margin:0}
.welcome{display:flex;flex-direction:column;gap:16px;padding-block:24px}
.welcome .pick{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.welcome .pick button{border:0;border-radius:22px;padding:28px 12px;font-family:var(--display);font-size:24px;font-weight:800;color:#fff}
.pick .p-en{background:var(--en)}.pick .p-es{background:var(--es)}
.empty{background:var(--surface);border:2px dashed var(--line);border-radius:20px;padding:20px;text-align:center;color:var(--muted)}

/* Bold & playful: sticker cards with ink outlines and hard offset shadows, bouncy motion, confetti on wins */
:root{--ink-line:#142a4a;--pop:4px 4px 0 var(--ink-line);--fun:"Chewy","Bricolage Grotesque",cursive}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--ink-line:#050b16}}
:root[data-theme="dark"]{--ink-line:#050b16}
body{background:var(--bg) radial-gradient(circle at 1px 1px,var(--line) 1.5px,transparent 0) 0 0/22px 22px}
.logo{font-family:var(--fun);font-weight:400;font-size:34px;letter-spacing:.01em;transform:rotate(-2deg)}
h2{font-family:var(--fun);font-weight:400;font-size:28px;letter-spacing:.01em}
.word,.prize,form,.search,.empty,.welcome .pick button{border:3px solid var(--ink-line);box-shadow:var(--pop)}
.word{transition:transform .15s,box-shadow .15s}
.word:hover{transform:translate(-2px,-2px) rotate(-.5deg);box-shadow:6px 6px 0 var(--ink-line)}
.lang{border:3px solid var(--ink-line);border-radius:50%;transform:rotate(-8deg);font-size:13px}
.chip{border:3px solid var(--ink-line)}
.chip[aria-pressed="true"]{background:var(--sun);color:#142a4a;box-shadow:3px 3px 0 var(--ink-line)}
.cta,.grade button,.redeem{border:3px solid var(--ink-line)!important;box-shadow:var(--pop);transition:transform .1s,box-shadow .1s}
.cta:active,.grade button:active,.redeem:active{transform:translate(3px,3px);box-shadow:1px 1px 0 var(--ink-line)}
.cta{font-family:var(--fun);font-weight:400;font-size:22px;letter-spacing:.02em}
.grade button{font-family:var(--fun);font-weight:400;font-size:20px}
.flash{height:320px;transition:transform .6s cubic-bezier(.34,1.56,.64,1)}
.face{border:4px solid var(--ink-line);box-shadow:6px 6px 0 var(--ink-line)}
.front h2{font-size:52px;text-shadow:3px 3px 0 rgba(0,0,0,.25)}
.front::after{content:"";position:absolute;top:18px;right:18px;width:46px;height:46px;border-radius:50%;background:var(--sun);border:3px solid var(--ink-line)}
.progress{height:16px;border:3px solid var(--ink-line)}
.prize.ready{animation:wiggle 1.6s ease-in-out infinite}
@keyframes wiggle{0%,100%{transform:rotate(0)}10%{transform:rotate(-1.5deg)}20%{transform:rotate(1.5deg)}30%{transform:rotate(0)}}
nav{border-top:3px solid var(--ink-line)}
nav button[aria-current="page"]{background:var(--sun);color:#142a4a;border:3px solid var(--ink-line);box-shadow:3px 3px 0 var(--ink-line)}
.toast{font-family:var(--fun);font-weight:400;font-size:20px;border:3px solid var(--sun);animation:pop .35s cubic-bezier(.34,1.56,.64,1)}
@keyframes pop{from{transform:translateX(-50%) scale(.6)}to{transform:translateX(-50%) scale(1)}}
#confetti{position:fixed;inset:0;pointer-events:none;z-index:50}
@media (prefers-reduced-motion:reduce){.prize.ready,.toast{animation:none}.flash{transition:none}}
.ghost{border:3px solid var(--ink-line);box-shadow:3px 3px 0 var(--ink-line)}
.welcome h2{font-size:32px}
.welcome .pick button{font-family:var(--fun);font-weight:400;font-size:28px}

/* palabra elefante: logo, splash screen, elephant mascot and the help tab */
.logo{display:flex;align-items:center;gap:8px;font-size:30px}
.logo img{width:46px;height:46px;object-fit:contain;transform:rotate(4deg)}
.splash{position:fixed;inset:0;z-index:100;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:18px;padding:24px;text-align:center;
  background:var(--bg) radial-gradient(circle at 1px 1px,var(--line) 1.5px,transparent 0) 0 0/22px 22px;transition:opacity .4s,transform .4s}
.splash.out{opacity:0;transform:scale(1.04);pointer-events:none}
.splash-logo{width:min(72vw,340px);height:auto;animation:bob 2.4s ease-in-out infinite}
.splash-msg{margin:0;font-family:var(--fun);font-size:28px;line-height:1.2;color:var(--ink);display:flex;flex-direction:column;gap:6px}
.splash-msg span{color:var(--es)}
.splash-go{padding:12px 36px;margin-top:4px}
@keyframes bob{0%,100%{transform:translateY(0) rotate(-2deg)}50%{transform:translateY(-8px) rotate(2deg)}}
.mascot{display:block;width:72px;height:auto;margin:0 auto 8px}
.mascot.big{width:120px}
.welcome .mascot{animation:bob 2.4s ease-in-out infinite}
.trek{position:relative;padding-top:30px}
.walker{position:absolute;top:0;width:40px;height:auto;margin-left:-20px;transition:left .4s}
.front::after{background:var(--sun) url(elefante.svg) center/80% no-repeat}
.help-hero{display:flex;gap:14px;align-items:center}
.help-hero .mascot{margin:0;flex:none;width:96px}
.help-hero p{margin:4px 0 0;color:var(--muted);font-weight:600}
.tip{display:flex;gap:12px;align-items:flex-start;background:var(--surface);border:3px solid var(--ink-line);box-shadow:var(--pop);border-radius:20px;padding:14px 16px}
.tip:nth-child(odd){transform:rotate(-.4deg)}.tip:nth-child(even){transform:rotate(.4deg)}
.tip-icon{flex:none;width:40px;height:40px;border-radius:50%;display:grid;place-items:center;font-size:20px;background:var(--sun-soft);border:3px solid var(--ink-line)}
.tip h3{font-size:18px}
.tip p{margin:2px 0 0}
nav button{font-size:11px}
@media (prefers-reduced-motion:reduce){.splash-logo,.welcome .mascot{animation:none}.splash{transition:none}}
.theme{margin-left:auto;width:44px;height:44px;border-radius:50%;display:grid;place-items:center;padding:0;background:var(--surface);color:var(--ink);border:3px solid var(--ink-line);box-shadow:3px 3px 0 var(--ink-line);transition:transform .1s,box-shadow .1s}
.theme:active{transform:translate(2px,2px);box-shadow:1px 1px 0 var(--ink-line)}
.theme svg{width:22px;height:22px}
.theme .sun{display:none;color:var(--sun)}
:root[data-theme="dark"] .theme .sun{display:block}:root[data-theme="dark"] .theme .moon{display:none}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .theme .sun{display:block}:root:not([data-theme="light"]) .theme .moon{display:none}}
.optional{font-weight:600;color:var(--muted)}

/* Compact word list: one line per word, tap to expand */
.selects{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.selects select{appearance:none;-webkit-appearance:none;width:100%;padding:8px 34px 8px 14px;border:3px solid var(--ink-line);border-radius:999px;font-weight:700;font-size:14px;color:var(--ink);cursor:pointer;
  background:var(--surface) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%23889' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E") right 14px center/12px no-repeat}
.wlist{background:var(--surface);border:3px solid var(--ink-line);box-shadow:var(--pop);border-radius:20px;overflow:hidden}
.wrow+.wrow{border-top:2px solid var(--line)}
.wrow-head{display:flex;align-items:center;gap:10px;width:100%;border:0;background:none;padding:10px 12px;text-align:left}
.wrow-head:hover{background:var(--sun-soft)}
.wrow.open .wrow-head{background:var(--sun-soft)}
.dot{flex:none;width:30px;height:30px;border-radius:50%;display:grid;place-items:center;font-size:11px;font-weight:800;color:#fff;border:2px solid var(--ink-line)}
.dot.en{background:var(--en)}.dot.es{background:var(--es)}
.wrow-text{flex:1;min-width:0;display:flex;flex-direction:column;line-height:1.25}
.wrow-text strong{font-size:17px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.wrow-text span{color:var(--muted);font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.wrow-body{padding:4px 14px 12px 52px;display:flex;flex-direction:column;gap:6px;background:var(--sun-soft)}
.wrow-body p{margin:0}
.wrow-body .ex{color:var(--muted);font-size:14px}
.wrow-foot{display:flex;justify-content:space-between;align-items:center;gap:8px}
.ghost.small{padding:6px 14px;font-size:14px}
.more{align-self:center}

/* Header person button and one-line stats */
header{flex-wrap:nowrap;gap:10px}
.logo{min-width:0;white-space:nowrap}
.theme{flex:none}
.me{flex:none;width:44px;height:44px;border-radius:50%;padding:0;display:grid;place-items:center;font-family:var(--fun);font-size:24px;line-height:1;color:#fff;border:3px solid var(--ink-line);box-shadow:3px 3px 0 var(--ink-line);transition:transform .1s,box-shadow .1s}
.me.en{background:var(--en)}.me.es{background:var(--es)}
.me:active{transform:translate(2px,2px);box-shadow:1px 1px 0 var(--ink-line)}
.stats{margin:0;display:flex;flex-wrap:wrap;justify-content:center;gap:4px 0;font-weight:800;font-size:14px;color:var(--muted);font-variant-numeric:tabular-nums}
.stats span+span::before{content:"·";margin:0 10px;color:var(--line)}
@media (max-width:400px){.logo{font-size:26px}.logo img{width:38px;height:38px}}