:root{--bg:#07140c;--card:#0f2418;--card2:#153020;--line:#1f4a30;--txt:#f3f5f9;--mut:#9aa4b5;--acc:#00a651;--acc2:#7CFC00;--ok:#2ecc71;--warn:#f1c40f;--bad:#e74c3c;--tabs:64px;--fs:18px}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;height:100%;background:var(--bg);color:var(--txt);font:var(--fs)/1.5 system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans",sans-serif;overflow:hidden}
body.big{--fs:21px}
button{font:inherit;color:inherit;cursor:pointer}
.hidden{display:none!important}
.view{position:fixed;inset:0 0 var(--tabs) 0;display:none}
.view.active{display:block}
.page{overflow-y:auto;background:var(--bg);padding-bottom:30px}
.overlay{z-index:30;bottom:0}
/* camera */
#video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;background:#000}
.cam-off{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:24px;background:radial-gradient(circle at 50% 30%,#0b3a1e,#0d0f14 70%);z-index:5}
.cam-off h1{margin:.2em 0;font-size:2em;letter-spacing:.5px}
.cam-off .ball{font-size:72px;animation:bounce 1.2s infinite cubic-bezier(.5,0,.5,1)}
@keyframes bounce{0%,100%{transform:translateY(0)}50%{transform:translateY(-22px)}}
.small{font-size:.8em;color:var(--mut)}
.frame-guide{position:absolute;inset:16% 7% 34% 7%;pointer-events:none;z-index:2}
.frame-guide span{position:absolute;width:34px;height:34px;border:4px solid var(--acc);opacity:.85;transition:border-color .2s}
.frame-guide span:nth-child(1){top:0;left:0;border-right:0;border-bottom:0;border-radius:10px 0 0 0}
.frame-guide span:nth-child(2){top:0;right:0;border-left:0;border-bottom:0;border-radius:0 10px 0 0}
.frame-guide span:nth-child(3){bottom:0;left:0;border-right:0;border-top:0;border-radius:0 0 0 10px}
.frame-guide span:nth-child(4){bottom:0;right:0;border-left:0;border-top:0;border-radius:0 0 10px 0}
.frame-guide.ready span{border-color:var(--ok)}
.cam-top{position:absolute;top:0;left:0;right:0;display:flex;align-items:center;gap:10px;padding:calc(env(safe-area-inset-top) + 10px) 12px 10px;background:linear-gradient(#000a,#0000);z-index:3}
.status{display:flex;align-items:center;gap:8px;font-weight:600;flex:1;font-size:.9em;text-shadow:0 1px 3px #000}
.dot{width:12px;height:12px;border-radius:50%;background:var(--mut);flex:none}
.dot.scan{background:var(--warn);animation:pulse 1s infinite}.dot.ok{background:var(--ok)}.dot.busy{background:var(--acc);animation:pulse .6s infinite}
@keyframes pulse{50%{opacity:.35}}
.meters{display:flex;gap:6px}
.meter{width:46px;height:8px;border-radius:5px;background:#fff3;overflow:hidden}
.meter i{display:block;height:100%;width:0;background:var(--acc);transition:width .2s}
.icon-btn{background:#0008;border:1px solid #fff3;border-radius:50%;width:42px;height:42px}
.cam-target{position:absolute;top:calc(env(safe-area-inset-top) + 58px);left:12px;right:12px;z-index:3;font-size:.8em}
.cam-target select{font:inherit;background:#000a;color:#fff;border:1px solid #fff4;border-radius:10px;padding:4px 8px;max-width:62vw}
.cam-controls{position:absolute;left:0;right:0;bottom:calc(25vh + 8px);display:flex;align-items:center;justify-content:space-around;z-index:3}
.shutter{width:78px;height:78px;border-radius:50%;border:5px solid #fff;background:var(--acc);display:grid;place-items:center;font-size:34px;box-shadow:0 4px 20px #0009}
.shutter:active{transform:scale(.93)}
.pill{background:#000b;border:1px solid #fff4;border-radius:22px;padding:8px 14px;font-size:.8em;font-weight:600}
.pill.on{background:var(--acc);border-color:var(--acc);color:#111}
.sheet{position:absolute;left:0;right:0;bottom:0;z-index:4;background:var(--card);border-radius:22px 22px 0 0;box-shadow:0 -6px 30px #000a;transition:height .25s;display:flex;flex-direction:column}
.sheet.collapsed{height:25vh}.sheet.expanded{height:88%}
.grab{padding:10px;display:flex;justify-content:center;flex:none;cursor:grab}
.grab span{width:48px;height:5px;border-radius:3px;background:#fff4}
.sheet-body{overflow-y:auto;padding:0 18px 20px;flex:1}
.hint{color:var(--mut)}
/* summary card */
.sum h3{margin:.2em 0 .3em;font-size:1.25em;color:var(--acc2)}
.sum h4{margin:1em 0 .3em;font-size:.95em;text-transform:uppercase;letter-spacing:.06em;color:var(--acc)}
.sum p.main{font-size:1.05em;margin:.2em 0}
.sum ul{margin:0;padding-left:1.1em}.sum li{margin:.3em 0}
.chips{display:flex;flex-wrap:wrap;gap:6px}.chip{background:var(--card2);border:1px solid var(--line);padding:3px 10px;border-radius:14px;font-size:.85em}
.quiz{background:var(--card2);border:1px solid var(--line);border-radius:12px;padding:10px 12px;margin:8px 0}
.quiz .a{display:none;color:var(--ok);font-weight:600;margin-top:6px}.quiz.open .a{display:block}
.quiz button{background:none;border:0;color:var(--acc2);padding:4px 0;font-size:.85em}
.engine{font-size:.75em;color:var(--mut)}
.row{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
.btn{border:0;border-radius:12px;padding:10px 14px;background:var(--card2);border:1px solid var(--line);font-weight:600}
.btn.primary{background:var(--acc);border-color:var(--acc);color:#111}.btn.big{padding:16px 26px;font-size:1.1em;border-radius:16px;margin:14px 0}
.btn.ghost{background:none}.btn.sm{padding:6px 10px;font-size:.8em}.btn.danger{color:var(--bad)}
details.raw summary{color:var(--mut);font-size:.85em;margin-top:12px}
details.raw pre{white-space:pre-wrap;font-size:.8em;color:var(--mut);background:var(--card2);padding:10px;border-radius:10px}
/* pages */
.bar{position:sticky;top:0;z-index:5;display:flex;align-items:center;gap:8px;padding:calc(env(safe-area-inset-top) + 10px) 14px 10px;background:#0d0f14ee;backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.bar h2{flex:1;margin:0;font-size:1.15em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.back{background:none;border:0;font-size:1.8em;line-height:1;padding:0 8px 0 0;color:var(--acc)}
.content{padding:14px}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:14px;margin-bottom:12px}
.item{display:flex;align-items:center;gap:12px;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:12px;margin-bottom:10px;width:100%;text-align:left}
.item .ic{font-size:1.8em}.item .t{flex:1;min-width:0}.item .t b{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.item .t small{color:var(--mut)}
.item img{width:54px;height:70px;object-fit:cover;border-radius:6px;background:#000}
.empty{text-align:center;color:var(--mut);padding:30px 10px}
.empty .ball{font-size:50px}
input[type=text],textarea,select.inp{width:100%;font:inherit;background:var(--card2);color:var(--txt);border:1px solid var(--line);border-radius:10px;padding:10px}
textarea{min-height:160px;font-size:.85em}
.chapter{margin:18px 0 8px;display:flex;align-items:center;gap:8px}.chapter h3{flex:1;margin:0;font-size:1em;color:var(--acc2)}
/* tabs */
.tabs{position:fixed;left:0;right:0;bottom:0;height:var(--tabs);display:flex;background:#0a0c10;border-top:1px solid var(--line);z-index:40;padding-bottom:env(safe-area-inset-bottom)}
.tabs button{flex:1;background:none;border:0;display:flex;flex-direction:column;align-items:center;justify-content:center;font-size:1.3em;opacity:.6}
.tabs button span{font-size:.5em;font-weight:600}.tabs button.active{opacity:1;color:var(--acc)}
.toast{position:fixed;left:50%;bottom:calc(var(--tabs) + 16px);transform:translateX(-50%) translateY(20px);background:#000e;border:1px solid var(--acc);padding:10px 16px;border-radius:12px;opacity:0;transition:.25s;z-index:60;font-size:.85em;pointer-events:none;max-width:90vw;text-align:center}
.toast.show{opacity:1;transform:translateX(-50%)}
.progress{position:fixed;inset:0;background:#000a;z-index:70;display:grid;place-items:center}
.pcard{background:var(--card);border-radius:18px;padding:22px;width:min(86vw,360px);text-align:center}
.spinner{font-size:46px;animation:spin 1.2s linear infinite;display:inline-block}@keyframes spin{to{transform:rotate(360deg)}}
.pbar{height:8px;background:var(--card2);border-radius:5px;overflow:hidden}.pbar i{display:block;height:100%;width:0;background:var(--acc);transition:width .2s}
.flash{animation:flash .35s}@keyframes flash{0%{box-shadow:inset 0 0 0 100vmax #fff8}100%{box-shadow:none}}

/* ===== Study tab (green/white, basketball) ===== */
#study-body h3{margin:22px 0 8px;color:var(--acc2)}#study-body h4{margin:16px 0 6px}
.st-card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:10px 12px;margin:8px 0}
.st-card summary{cursor:pointer}.st-card ol{margin:6px 0 4px;padding-left:22px}
.st-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:8px}.st-grid .st-card{margin:0}.st-grid p{margin:4px 0 0}
.st-rules{background:#fff;color:#07140c;border-radius:14px;padding:10px 14px;font-weight:600;border-left:8px solid var(--acc)}.st-rules div{padding:3px 0}
.st-ans{color:var(--acc2);font-weight:700;margin-top:4px}.st-show{float:right;font-size:.8em;color:var(--acc2)}
.st-warn{border-color:#8a6d00;background:#2a2405}.st-notice{border-color:var(--acc);font-size:.88em}
.st-opts{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin:8px 0}
.st-opt{background:var(--card2);border:1px solid var(--line);border-radius:10px;padding:8px}.st-opt.ok{background:var(--acc);color:#fff}.st-opt.bad{background:var(--bad)}
.st-sec{background:var(--card);border:1px solid var(--line);border-radius:14px;margin:8px 0;overflow:hidden}.st-sec.done{border-color:var(--acc)}
.st-sec-h{display:flex;gap:12px;align-items:center;width:100%;text-align:left;background:none;border:0;padding:12px}.st-sec-h>span:first-child{font-size:1.6em}.st-sec-h>span:nth-child(2){flex:1}
.st-sec-b{padding:0 12px 14px}.st-done{width:100%;margin-top:14px}
.st-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.st-metrics div{background:var(--card);border-radius:12px;padding:8px;text-align:center}.st-metrics b{display:block;font-size:1.25em;color:var(--acc2)}.st-metrics span{font-size:.75em;color:var(--mut)}
.st-bar{height:10px;background:var(--card2);border-radius:6px;margin:8px 0;overflow:hidden}.st-bar i{display:block;height:100%;background:linear-gradient(90deg,var(--acc),var(--acc2))}
.st-spot{width:100%;height:352px;border:0;border-radius:12px;margin-top:8px}
.st-row{display:flex;flex-wrap:wrap;gap:6px;margin:8px 0}.st-row input{flex:1;min-width:0;font:inherit;background:var(--card2);color:var(--txt);border:1px solid var(--line);border-radius:10px;padding:8px}
.st-check{display:flex;gap:8px;align-items:flex-start;padding:4px 0}
/* 🎤 voice commands */
.mic-btn{position:fixed;right:14px;bottom:calc(var(--tabs) + 14px + env(safe-area-inset-bottom));z-index:30;width:56px;height:56px;border-radius:50%;border:3px solid var(--acc2);background:var(--card2);color:#fff;font-size:26px;box-shadow:0 4px 18px #000a}
.mic-btn.on{background:var(--bad);border-color:#fff;animation:pulse 1s infinite}
body.cam-on .mic-btn{bottom:auto;top:calc(76px + env(safe-area-inset-top))}
.voice-panel{position:fixed;left:12px;right:80px;bottom:calc(var(--tabs) + 12px + env(safe-area-inset-bottom));z-index:31;background:var(--card);border:2px solid var(--acc);border-radius:16px;padding:10px 12px;box-shadow:0 6px 24px #000b;max-height:55vh;overflow:auto}
.voice-panel.hidden{display:none}
.vp-top{display:flex;justify-content:space-between;align-items:center;gap:8px}
.vp-x{background:none;border:0;color:var(--mut);font-size:1.1em}
.vp-heard{font-size:1.05em;color:var(--acc2);margin:4px 0;min-height:1.2em}
.voice-panel ul{margin:6px 0;padding-left:18px;font-size:.85em}
.voice-panel summary{color:var(--acc2);font-size:.85em;margin-top:6px}
/* home */
.tabs button{min-width:0;font-size:1.15em}.tabs button span{font-size:.55em;white-space:nowrap}
.hm-hero{display:flex;gap:14px;align-items:center;background:linear-gradient(135deg,#00a651,#0b3a1e);border-radius:18px;padding:16px;margin-bottom:12px;box-shadow:0 4px 18px #0007}
.hm-hero h2{margin:0;font-size:1.25em}.hm-hero .small{color:#e6ffe9}
.hm-ball{font-size:46px;animation:bounce 1.6s infinite cubic-bezier(.5,0,.5,1)}
.hm-count{border:2px solid var(--acc);text-align:center}.hm-big{font-size:1.8em;color:var(--acc2);margin-right:4px}
.hm-rhythm{border:2px dashed var(--warn)}.hm-rhythm.open{border:2px solid var(--acc2)}
.hm-rhythm #rh-time{font-variant-numeric:tabular-nums;font-size:1.2em;color:var(--acc2)}
.hm-rule{margin:.6em 0 0}
.hm-stats{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.hm-stats>div{background:var(--card2);border:1px solid var(--line);border-radius:14px;padding:10px;text-align:center;display:flex;flex-direction:column}
.hm-stats b{font-size:1.3em}.hm-stats span{font-size:.75em;color:var(--mut)}
.hm-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(96px,1fr));gap:10px}
.hm-tile{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;min-height:96px;padding:10px 6px;border-radius:16px;background:var(--card2);border:2px solid var(--line);color:var(--txt);text-decoration:none;text-align:center;font-size:.85em}
.hm-tile:active{transform:scale(.96)}.hm-tile .hm-ic{font-size:2em}
.hm-tile.locked{opacity:.55;border-style:dashed;cursor:not-allowed}.hm-lock{font-size:.7em;color:var(--warn)}
.st-music-locked{border:2px dashed var(--warn)}
/* 🎤 μεγάλο κουμπί φωνής «Πάτα και μίλα» */
.page{padding-bottom:110px}
.mic-btn{width:auto;height:60px;border-radius:32px;padding:0 10px 0 20px;display:flex;align-items:center;gap:10px;background:var(--acc);border:3px solid #fff;color:#07140c;font-size:1em;font-weight:800;box-shadow:0 4px 22px #000c}
.mic-btn .mic-i{font-size:28px;background:#fff;border-radius:50%;width:42px;height:42px;display:grid;place-items:center}
.mic-btn.on{background:var(--bad);color:#fff;border-color:#fff}
body.home-on .mic-btn:not(.on){animation:micPulse 2.2s ease-in-out infinite}
@keyframes micPulse{0%,100%{box-shadow:0 4px 22px #000c,0 0 0 0 #7CFC0099}50%{box-shadow:0 4px 22px #000c,0 0 0 14px #7CFC0000;transform:scale(1.04)}}
body.cam-on .mic-btn{top:calc(112px + env(safe-area-inset-top));height:50px;font-size:.85em;padding-left:14px}
body.cam-on .mic-btn .mic-i{width:34px;height:34px;font-size:22px}
.voice-panel{right:12px;bottom:calc(var(--tabs) + 88px + env(safe-area-inset-bottom))}
.mic-hint{position:fixed;right:14px;bottom:calc(var(--tabs) + 88px + env(safe-area-inset-bottom));z-index:32;max-width:min(78vw,320px);background:#fff;color:#07140c;border-radius:16px;padding:12px 34px 12px 14px;font-size:.9em;box-shadow:0 6px 24px #000b;animation:hintIn .35s ease-out}
.mic-hint::after{content:"";position:absolute;right:46px;bottom:-10px;border:10px solid transparent;border-bottom:0;border-top-color:#fff}
.mic-hint .vp-x{position:absolute;top:6px;right:8px;color:#555}
body.cam-on .mic-hint{display:none}
@keyframes hintIn{from{opacity:0;transform:translateY(10px)}}
.hm-help{border:2px solid var(--acc)}
/* 🎬 οδηγός */
.tour{position:fixed;inset:0;z-index:1000}
.tour.hidden{display:none}
.tour-block{position:absolute;inset:0}
.tour-hole{position:fixed;border-radius:16px;box-shadow:0 0 0 200vmax #000c;border:3px solid var(--acc2);pointer-events:none;transition:all .35s ease;animation:holeGlow 1.6s ease-in-out infinite}
.tour-hole.none{left:50%!important;top:50%!important;width:0!important;height:0!important;border:0}
@keyframes holeGlow{50%{border-color:#fff}}
.tour-card{position:fixed;left:12px;right:12px;margin:0 auto;max-width:440px;background:linear-gradient(160deg,#0f2418,#07140c);border:2px solid var(--acc);border-radius:20px;padding:12px 16px 14px;box-shadow:0 10px 40px #000;z-index:2}
.tour-card.top{top:calc(env(safe-area-inset-top) + 14px)}.tour-card.bottom{bottom:calc(var(--tabs) + 14px)}.tour-card.mid{top:50%;transform:translateY(-50%)}
.tour-card.pop{animation:cardPop .35s ease-out}.tour-card.mid.pop{animation:cardPopMid .35s ease-out}
@keyframes cardPop{from{opacity:0;transform:translateY(14px) scale(.97)}}
@keyframes cardPopMid{from{opacity:0;transform:translateY(-45%) scale(.97)}}
.tour-card h3{margin:.2em 0;color:var(--acc2);font-size:1.15em}.tour-card p{margin:.2em 0 .5em}
.tour-top{display:flex;align-items:center;gap:6px}.tour-top span{flex:1}
.tour-ic{background:var(--card2);border:1px solid var(--line);border-radius:50%;width:38px;height:38px}
.tour-art{font-size:46px;text-align:center;line-height:1.2;height:58px}
.tour-art.bounce{animation:bounce 1.2s infinite cubic-bezier(.5,0,.5,1)}
.tour-art.snap{animation:snap 1.4s infinite}
@keyframes snap{0%,60%,100%{filter:none;transform:scale(1)}70%{filter:brightness(2.5);transform:scale(1.12)}}
.tour-time{height:5px;background:var(--card2);border-radius:3px;overflow:hidden;margin:6px 0}.tour-time i{display:block;height:100%;width:0;background:var(--acc)}
.tour-dots{display:flex;gap:5px;justify-content:center;margin:6px 0}.tour-dots i{width:8px;height:8px;border-radius:50%;background:#fff3}.tour-dots i.done{background:var(--acc)}.tour-dots i.on{background:var(--acc2);transform:scale(1.4)}
.tour-btns{display:flex;align-items:center;gap:6px}.tour-btns span{flex:1}.tour-btns .btn.primary{padding:12px 20px;font-size:1em}
.tour-practice{background:var(--card2);border-radius:12px;padding:8px 10px;margin:6px 0}.tour-practice .btn{width:100%}
body.tour-mic-live .mic-btn{z-index:1001}
body.tour-on .voice-panel{z-index:1002}
body.tour-on .mic-hint{display:none}
@media (prefers-reduced-motion:reduce){.tour-art,.tour-hole,body.home-on .mic-btn:not(.on),.tour-card.pop{animation:none!important}.tour-hole{transition:none}}