@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@700;900&family=Exo+2:wght@400;600&display=swap');

*{box-sizing:border-box;margin:0;padding:0}
body{min-height:100vh;background:radial-gradient(ellipse at 25% 15%,#0b1d30,#050912 50%,#020408);color:#fff;font-family:'Exo 2',sans-serif;overflow-x:hidden}

.star{position:fixed;border-radius:50%;background:#fff;pointer-events:none;animation:tw var(--d) var(--dl) ease-in-out infinite}
@keyframes tw{0%,100%{opacity:.1}50%{opacity:.8}}
@keyframes glow{0%,100%{text-shadow:0 0 10px currentColor}50%{text-shadow:0 0 28px currentColor,0 0 52px currentColor}}
@keyframes slideIn{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}
@keyframes pop{0%{transform:scale(.7);opacity:0}70%{transform:scale(1.08)}100%{transform:scale(1);opacity:1}}
@keyframes shake{0%,100%{transform:none}25%{transform:translateX(-6px)}75%{transform:translateX(6px)}}
@keyframes floatUp{0%{opacity:1;transform:translateY(0)}100%{opacity:0;transform:translateY(-70px)}}

/* ── top bar: pinyin toggle + logout ── */
#pinyin-btn{position:fixed;top:12px;right:12px;z-index:300;padding:5px 12px;border:1px solid rgba(0,245,255,.4);border-radius:20px;background:rgba(0,245,255,.12);color:#00f5ff;font-family:'Exo 2',sans-serif;font-size:11px;cursor:pointer}
#logout-btn{position:fixed;top:12px;left:12px;z-index:300;padding:5px 12px;border:1px solid rgba(255,255,255,.15);border-radius:20px;background:rgba(255,255,255,.05);color:#44667a;font-family:'Exo 2',sans-serif;font-size:11px;cursor:pointer}
#who-badge{position:fixed;top:44px;left:12px;z-index:300;font-size:10px;color:#334d5c;letter-spacing:2px}

/* ── views/screens ── */
.view,.screen{display:none;padding:22px 18px 48px;max-width:460px;margin:0 auto}
.view.active,.screen.active{display:block;animation:slideIn .4s ease}

/* ── shared headings ── */
.title{font-family:'Orbitron',monospace;font-size:clamp(26px,7vw,40px);font-weight:900;color:#00f5ff;letter-spacing:4px;text-align:center;animation:glow 3s ease-in-out infinite;margin-bottom:4px}
.sub{text-align:center;font-size:10px;color:#334d5c;letter-spacing:5px;margin-bottom:22px}

/* ── stat/xp panels ── */
.xp-panel{background:rgba(0,245,255,.05);border:1px solid rgba(0,245,255,.2);border-radius:16px;padding:16px 20px;text-align:center;margin-bottom:20px}
.xp-val{font-family:'Orbitron',monospace;font-size:22px;font-weight:700;color:#00f5ff}
.stat-row{display:flex;gap:10px;margin-bottom:20px}
.stat{flex:1;background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.07);border-radius:12px;padding:12px 6px;text-align:center}
.stat-icon{font-size:20px;margin-bottom:4px}
.stat-num{font-family:'Orbitron',monospace;font-size:18px;font-weight:700}
.stat-lbl{font-size:9px;color:#44667a;letter-spacing:2px;margin-top:2px}

/* ── buttons ── */
.btn-primary{display:block;width:100%;padding:15px;background:rgba(0,245,255,.08);border:1.5px solid #00f5ff;border-radius:14px;color:#00f5ff;font-family:'Orbitron',monospace;font-size:14px;font-weight:700;letter-spacing:4px;cursor:pointer;margin-bottom:12px;text-align:center}
.btn-secondary{display:block;width:100%;padding:12px;background:transparent;border:1px solid rgba(255,255,255,.12);border-radius:14px;color:#44667a;font-family:'Orbitron',monospace;font-size:11px;letter-spacing:3px;cursor:pointer;text-align:center}

/* ── nav grid (student home: pick a game) ── */
.game-grid{display:flex;flex-direction:column;gap:10px;margin-bottom:20px}
.game-card{background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.08);border-radius:14px;padding:14px 16px;display:flex;align-items:center;gap:14px;cursor:pointer}
.game-card:active{transform:scale(.98)}
.game-icon{font-size:26px}
.game-name{font-family:'Orbitron',monospace;font-size:13px;color:#cce0ee;letter-spacing:2px}
.game-sub{font-size:10px;color:#44667a;margin-top:2px}

/* ── quiz (Quest) ── */
#progress-bar{height:4px;background:#081520;border-radius:2px;overflow:hidden;margin-bottom:18px}
#progress-fill{height:100%;background:linear-gradient(90deg,#00f5ff,#8844ff);transition:width .5s ease}
#dots{display:flex;gap:8px;justify-content:center;margin-bottom:18px}
.dot{width:9px;height:9px;border-radius:50%;background:#0d1f30;transition:all .3s}
.dot.active{background:#00f5ff;box-shadow:0 0 8px #00f5ff;transform:scale(1.3)}
.dot.correct{background:#00ff88}
.dot.wrong{background:#ff4466}
#prompt-card{background:rgba(0,245,255,.04);border:1px solid rgba(0,245,255,.18);border-radius:20px;padding:28px 20px;text-align:center;margin-bottom:20px}
#prompt-label{font-size:10px;color:#44667a;letter-spacing:4px;margin-bottom:14px}
#prompt-text{font-size:clamp(36px,9vw,72px);color:#fff;line-height:1.2;font-family:serif}
#prompt-text.meaning{font-family:'Exo 2',sans-serif;font-size:clamp(16px,4.5vw,24px);font-weight:700}
#prompt-pinyin{font-size:12px;color:#44667a;margin-top:10px;min-height:18px}
#options{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:16px}
.opt{padding:16px 8px;background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.1);border-radius:14px;color:#cce0ee;font-size:14px;cursor:pointer;text-align:center;line-height:1.3;font-family:serif;transition:all .2s}
.opt.meaning-opt{font-family:'Exo 2',sans-serif;font-size:11px;font-weight:600}
.opt:active{transform:scale(.95)}
.opt.correct{border-color:#00ff88!important;background:rgba(0,255,136,.1)!important;color:#00ff88!important;animation:pop .4s ease}
.opt.wrong{border-color:#ff4466!important;background:rgba(255,68,102,.1)!important;color:#ff4466!important;animation:shake .35s ease}
.opt.dim{opacity:.45;pointer-events:none}
#feedback-text{text-align:center;font-size:13px;font-weight:600;min-height:22px;transition:all .3s}

/* ── result ── */
#result-title{font-family:'Orbitron',monospace;font-size:clamp(15px,4vw,22px);font-weight:700;letter-spacing:2px;text-align:center;margin-bottom:4px}
#result-score{font-family:'Orbitron',monospace;font-size:clamp(56px,14vw,84px);font-weight:900;line-height:1;text-align:center;margin-bottom:4px}
#result-xp{font-size:13px;color:#00f5ff;text-align:center;margin-bottom:22px}
#result-list{background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.07);border-radius:16px;padding:16px 14px;margin-bottom:16px}
.rl-row{display:flex;align-items:center;gap:12px;padding:9px 0;border-bottom:1px solid rgba(255,255,255,.05)}
.rl-row:last-child{border-bottom:none}
.rl-icon{font-size:15px;width:20px}
.rl-char{font-family:serif;font-size:22px;color:#fff;min-width:80px}
.rl-info{font-size:10px;color:#44667a}

/* ── vocab codex ── */
#codex-list{display:flex;flex-direction:column;gap:8px}
.cx-card{background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.08);border-radius:12px;padding:12px 14px;display:flex;align-items:center;gap:14px}
.cx-char{font-family:serif;font-size:22px;color:#fff;min-width:90px;line-height:1.4}
.cx-py{font-size:11px;color:#00cfff;margin-bottom:2px}
.cx-en{font-size:11px;color:#44667a}
.back-btn{display:flex;align-items:center;gap:10px;margin-bottom:18px;cursor:pointer;color:#44667a}
.back-arrow{font-size:22px}
.back-label{font-family:'Orbitron',monospace;font-size:13px;letter-spacing:3px}

/* ── floater (xp/star pop feedback) ── */
.floater{position:fixed;font-size:24px;pointer-events:none;animation:floatUp 1.1s ease-out forwards}

/* ── auth forms ── */
.auth-box{background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.08);border-radius:16px;padding:22px 18px;margin-top:60px}
.auth-box input{display:block;width:100%;padding:12px 14px;margin-bottom:10px;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.12);border-radius:10px;color:#fff;font-family:'Exo 2',sans-serif;font-size:14px}
.auth-switch{text-align:center;font-size:11px;color:#44667a;margin-top:14px;cursor:pointer}
#auth-error{color:#ff4466;font-size:12px;text-align:center;min-height:18px;margin-bottom:6px}

/* ── toast ── */
#toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);background:rgba(0,245,255,.14);border:1px solid rgba(0,245,255,.4);color:#00f5ff;padding:10px 18px;border-radius:20px;font-size:12px;z-index:400;opacity:0;pointer-events:none;transition:opacity .3s}
#toast.show{opacity:1}

/* ── Recall ── */
.para-box{background:rgba(0,245,255,.04);border:1px solid rgba(0,245,255,.18);border-radius:18px;padding:16px;margin-bottom:16px}
.para-hdr{display:flex;justify-content:space-between;font-size:9px;color:#334d5c;letter-spacing:3px;margin-bottom:10px}
.para-text{font-family:serif;font-size:14px;color:#b8d4e8;line-height:2.2;letter-spacing:.5px}
.mode-btn{display:block;width:100%;margin-bottom:10px;text-align:left;padding:16px 18px;border-radius:16px;cursor:pointer;border:none;transition:all .2s}
.mode-hdr{display:flex;align-items:center;gap:10px;margin-bottom:6px}
.mode-badge{margin-left:auto;font-family:'Exo 2',sans-serif;font-size:9px;letter-spacing:2px;border-radius:4px;padding:2px 6px}
.mode-desc{font-family:'Exo 2',sans-serif;font-size:12px;color:#5577aa;margin-left:32px}
.mode-xp{font-family:'Exo 2',sans-serif;font-size:10px;color:#334d5c;margin-left:32px;margin-top:4px}
.back-row{display:flex;align-items:center;gap:10px;margin-bottom:18px;cursor:pointer}
.all-chars{background:rgba(136,68,255,.05);border:1px solid rgba(136,68,255,.2);border-radius:16px;padding:16px;margin-bottom:18px}
.all-chars-lbl{font-size:9px;color:#334d5c;letter-spacing:3px;margin-bottom:10px}
.char-inline{display:inline-block;text-align:center;margin:2px}
.char-inline .py{font-size:8px;height:12px;line-height:12px}
.char-inline .ch{font-family:serif;font-size:17px;line-height:1.2;transition:color .2s}
.focus-box{background:rgba(136,68,255,.08);border:1px solid rgba(136,68,255,.3);border-radius:16px;padding:18px 16px;margin-bottom:16px}
.focus-hdr{display:flex;justify-content:space-between;margin-bottom:14px}
.nav-btn{background:transparent;border:1px solid rgba(136,68,255,.3);border-radius:6px;color:#8844ff;width:26px;height:26px;cursor:pointer;font-size:12px}
.focus-chars{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}
.fc{text-align:center}
.fc-py{font-size:10px;color:#8844ff;margin-bottom:3px}
.fc-ch{font-family:serif;font-size:clamp(26px,7vw,38px);color:#fff;animation:pop .3s ease}
.focus-en{font-size:12px;color:#44667a;font-style:italic;border-top:1px solid rgba(136,68,255,.15);padding-top:10px}
.read-btn{display:block;width:100%;padding:13px;background:rgba(136,68,255,.1);border:1px solid #8844ff;border-radius:12px;color:#8844ff;font-family:'Orbitron',monospace;font-size:11px;font-weight:700;letter-spacing:3px;cursor:pointer;text-align:center}
#recall-progress-bar{height:4px;background:#081520;border-radius:2px;overflow:hidden;margin-bottom:16px}
#recall-progress-fill{height:100%;transition:width .5s ease}
#recall-phrase-dots{display:flex;gap:4px;margin-bottom:16px;justify-content:center;flex-wrap:wrap}
.pdot{width:8px;height:8px;border-radius:50%;background:#0d2030;transition:all .3s}
.pdot.done{background:#00cfff}
.pdot.active{background:#fff;transform:scale(1.3)}
.pdot.done-r{background:#00ff88}
#recall-hint-box{border-radius:12px;padding:10px 14px;margin-bottom:14px;display:flex;align-items:center;justify-content:space-between;transition:all .3s}
#recall-placed-area{border-radius:16px;padding:14px 12px;margin-bottom:14px;min-height:72px}
#recall-placed-lbl{font-size:9px;color:#334d5c;letter-spacing:3px;margin-bottom:10px}
#recall-placed-tiles{display:flex;flex-wrap:wrap;gap:4px;align-items:center}
.place-slot{width:38px;height:50px;border-radius:9px;display:flex;flex-direction:column;align-items:center;justify-content:center;transition:all .25px}
.place-slot .s-py{font-size:7px;margin-bottom:1px}
.place-slot .s-ch{font-family:serif;font-size:20px}
#recall-undo-btn{width:32px;height:32px;border-radius:8px;background:rgba(255,68,102,.08);border:1px solid rgba(255,68,102,.3);color:#ff4466;font-size:14px;cursor:pointer;margin-left:4px}
#recall-bank-area{background:rgba(255,255,255,.02);border:1px solid rgba(255,255,255,.06);border-radius:14px;padding:12px 10px}
#recall-bank-lbl{font-size:9px;color:#334d5c;letter-spacing:3px;margin-bottom:10px}
#recall-bank-tiles{display:flex;flex-wrap:wrap;gap:6px}
.bank-tile{width:44px;height:54px;border-radius:10px;cursor:pointer;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.11);display:flex;flex-direction:column;align-items:center;justify-content:center;transition:all .15s;touch-action:manipulation}
.bank-tile:active{filter:brightness(1.6);transform:scale(.9)}
.bank-tile .t-py{font-size:7px;color:#334d5c;margin-bottom:2px}
.bank-tile .t-ch{font-family:serif;font-size:24px;color:#c8dcea}
.bank-tile.shaking{animation:shake .35s ease}
.bank-tile.correct-tile{border-color:#00ff88;background:rgba(0,255,136,.1);color:#00ff88}
.bank-tile.wrong-tile{border-color:#ff4466;background:rgba(255,68,102,.1);color:#ff4466}
#recall-drill-feedback{text-align:center;margin:10px 0;font-family:'Orbitron',monospace;font-size:13px;font-weight:700;letter-spacing:2px}
#recall-next-btn{display:none;width:100%;padding:14px;border-radius:13px;font-family:'Orbitron',monospace;font-size:13px;font-weight:700;letter-spacing:3px;cursor:pointer;text-align:center;margin-top:10px}
#recall-sum-title{font-family:'Orbitron',monospace;font-weight:700;font-size:clamp(14px,3.5vw,20px);letter-spacing:2px;text-align:center;margin-bottom:6px}
#recall-sum-score{font-family:'Orbitron',monospace;font-weight:900;font-size:clamp(50px,12vw,76px);line-height:1;text-align:center;margin-bottom:4px}
#recall-sum-sub{font-size:12px;color:#00f5ff;text-align:center;margin-bottom:24px}
#recall-sum-list{background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.07);border-radius:16px;padding:16px 14px;margin-bottom:20px}
.sl-row{display:flex;align-items:center;gap:12px;padding:9px 0;border-bottom:1px solid rgba(255,255,255,.05);font-size:14px}
.sl-row:last-child{border-bottom:none}
.btn-go{display:block;width:100%;padding:14px;border-radius:13px;font-family:'Orbitron',monospace;font-size:13px;font-weight:700;letter-spacing:3px;cursor:pointer;text-align:center;margin-bottom:10px}

/* ── Wall ── */
@keyframes boom{0%{opacity:1;transform:translate(-50%,-50%) scale(.7)}60%{opacity:1;transform:translate(-50%,-50%) scale(1.7)}100%{opacity:0;transform:translate(-50%,-50%) scale(2.2) translateY(-20px)}}
@keyframes wrongPop{0%{opacity:1}100%{opacity:0;transform:translate(-50%,-50%) scale(.5)}}
@keyframes danger{0%,100%{box-shadow:0 0 6px rgba(255,60,60,.4)}50%{box-shadow:0 0 20px rgba(255,60,60,.9)}}
@keyframes combo{0%{opacity:0;transform:scale(.5)}100%{opacity:1;transform:scale(1)}}
.how-box{background:rgba(255,107,53,.06);border:1px solid rgba(255,107,53,.22);border-radius:18px;padding:18px 16px;margin-bottom:18px}
.how-row{display:flex;gap:10px;margin-bottom:8px;align-items:flex-start;font-size:12px;color:#8899aa}
.how-row:last-child{margin-bottom:0}
.btn-launch{display:block;width:100%;padding:17px;background:rgba(255,107,53,.14);border:1.5px solid #ff6b35;border-radius:14px;color:#ff6b35;font-family:'Orbitron',monospace;font-size:16px;font-weight:900;letter-spacing:5px;cursor:pointer;text-align:center}
#wall-hud{display:flex;align-items:center;gap:10px;margin-bottom:6px;height:32px}
#wall-combo-row{height:24px;display:flex;align-items:center;justify-content:center;margin-bottom:4px;font-family:'Orbitron',monospace;font-size:13px;font-weight:900;color:#ffd700;text-shadow:0 0 12px #ffd700;animation:combo .2s ease}
#wall-arena{position:relative;height:400px;background:linear-gradient(180deg,rgba(3,9,18,0),rgba(3,9,18,.7));border-radius:16px;overflow:hidden;border:1px solid rgba(255,107,53,.18);box-shadow:inset 0 0 60px rgba(0,0,0,.6);margin-bottom:12px}
.col-line{position:absolute;top:0;bottom:0;width:1px;background:rgba(255,255,255,.03)}
#wall-warn-zone{position:absolute;bottom:0;left:0;right:0;height:70px;background:linear-gradient(to top,rgba(255,40,40,.12),transparent);pointer-events:none}
#wall-warn-line{position:absolute;bottom:68px;left:0;right:0;height:1px;background:rgba(255,60,60,.25)}
.tile{position:absolute;width:30%;border-radius:12px;background:rgba(4,10,20,.88);border:1.5px solid rgba(255,255,255,.15);display:flex;flex-direction:column;align-items:center;justify-content:center;cursor:pointer;padding:6px 4px;transition:border-color .3s;touch-action:manipulation;user-select:none}
.tile:active{filter:brightness(1.7);transform:translateX(-50%) scale(.88)!important}
.tile.danger-tile{animation:danger .7s ease-in-out infinite}
.tile-py{font-size:7px;margin-bottom:3px;text-align:center;line-height:1.2}
.tile-char{font-family:serif;line-height:1.15;text-align:center}
.explosion{position:absolute;pointer-events:none;text-align:center;transform:translate(-50%,-50%)}
.exp-hit{animation:boom .75s ease-out forwards;font-size:26px}
.exp-miss{animation:wrongPop .5s ease-out forwards;font-size:24px}
#wall-target-box{background:rgba(255,107,53,.09);border:2px solid rgba(255,107,53,.55);border-radius:16px;padding:13px 16px;text-align:center;box-shadow:0 0 28px rgba(255,107,53,.18)}
#wall-target-label{font-family:'Share Tech Mono',monospace;font-size:9px;color:#3a2010;letter-spacing:6px;margin-bottom:7px}
#wall-target-meaning{font-family:'Orbitron',monospace;font-weight:900;font-size:clamp(17px,5vw,27px);color:#ff6b35;letter-spacing:2px;animation:glow 1.8s ease-in-out infinite;text-transform:uppercase}
#wall-target-py{font-size:11px;color:#3a2010;margin-top:5px}
#wall-over-title{font-family:'Orbitron',monospace;font-weight:900;font-size:clamp(18px,5vw,26px);color:#ff4466;letter-spacing:3px;text-shadow:0 0 18px #ff4466;text-align:center;margin-bottom:6px}
#wall-over-score{font-family:'Orbitron',monospace;font-weight:900;font-size:clamp(50px,13vw,82px);line-height:1;text-align:center;margin-bottom:6px}
#wall-over-grade{font-family:'Orbitron',monospace;font-size:13px;letter-spacing:3px;text-align:center;margin-bottom:4px}
#wall-over-hi{font-size:11px;color:#ffd700;text-shadow:0 0 12px #ffd700;text-align:center;margin-bottom:4px;letter-spacing:4px;font-family:'Orbitron',monospace}
#wall-over-xp{font-size:13px;color:#ff6b35;text-align:center;margin-bottom:24px}
#wall-over-stats{background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.07);border-radius:16px;padding:18px 16px;margin-bottom:20px;display:grid;grid-template-columns:1fr 1fr;gap:16px;text-align:center}
.os-val{font-family:'Orbitron',monospace;font-size:22px;font-weight:700;color:#ff6b35}
.os-lbl{font-size:8px;color:#334455;letter-spacing:2px;margin-top:3px}
.btn-play{display:block;width:100%;padding:15px;background:rgba(255,107,53,.12);border:1.5px solid #ff6b35;border-radius:13px;color:#ff6b35;font-family:'Orbitron',monospace;font-size:14px;font-weight:900;letter-spacing:4px;cursor:pointer;text-align:center;margin-bottom:10px}
.btn-sec{display:block;width:100%;padding:11px;background:transparent;border:1px solid rgba(255,255,255,.1);border-radius:13px;color:#44667a;font-family:'Orbitron',monospace;font-size:10px;letter-spacing:3px;cursor:pointer;text-align:center}

/* ── Handwrite / Dictation shared (canvas trace) ── */
@keyframes spin{from{transform:rotate(0deg)}to{transform:rotate(360deg)}}
.btn-start{display:block;width:100%;padding:16px;background:rgba(0,245,255,.08);border:1.5px solid #00f5ff;border-radius:14px;color:#00f5ff;font-family:'Orbitron',monospace;font-size:15px;font-weight:900;letter-spacing:4px;cursor:pointer;text-align:center;margin-bottom:12px;box-shadow:0 0 20px rgba(0,245,255,.25)}
.btn-codex{display:block;width:100%;padding:12px;background:transparent;border:1px solid rgba(255,255,255,.1);border-radius:14px;color:#44667a;font-family:'Orbitron',monospace;font-size:11px;letter-spacing:3px;cursor:pointer;text-align:center}
.prog-bar{height:4px;background:#081520;border-radius:2px;overflow:hidden;margin-bottom:14px}
.prog-fill{height:100%;background:linear-gradient(90deg,#00f5ff,#8844ff);transition:width .5s ease}
.trace-prompt-card{background:rgba(0,245,255,.05);border:1px solid rgba(0,245,255,.2);border-radius:16px;padding:16px 18px;margin-bottom:14px;text-align:center}
.trace-prompt-lbl{font-size:10px;color:#334d5c;letter-spacing:4px;margin-bottom:8px}
.trace-prompt-meaning{font-family:'Orbitron',monospace;font-weight:900;font-size:clamp(18px,5vw,28px);color:#00f5ff;letter-spacing:2px;animation:glow 2s ease-in-out infinite;text-transform:uppercase}
.trace-prompt-py{font-size:13px;color:#44667a;margin-top:6px}
.peek-btn{margin-top:10px;padding:4px 12px;background:transparent;border:1px solid rgba(0,245,255,.25);border-radius:8px;color:#334d5c;font-size:10px;cursor:pointer}
.peek-char{margin-top:8px;font-family:serif;font-size:clamp(30px,8vw,50px);color:rgba(0,245,255,.3);letter-spacing:4px;animation:pop .3s ease;display:none}
.canvas-wrap{position:relative;margin-bottom:12px;overflow:hidden;transition:border .4s,box-shadow .4s;border:2px solid rgba(255,255,255,.12);border-radius:14px}
.draw-canvas{display:block;width:100%;background:#030912;touch-action:none;cursor:crosshair;height:300px}
.box-overlay{position:absolute;top:0;left:0;right:0;bottom:0;display:flex;pointer-events:none;z-index:1}
.checking-overlay{display:none;position:absolute;inset:0;background:rgba(3,9,18,.75);flex-direction:column;align-items:center;justify-content:center;gap:10px}
.spin-ring{width:28px;height:28px;border:3px solid #00f5ff;border-top-color:transparent;border-radius:50%;animation:spin .8s linear infinite}
.ctrl-row{display:flex;gap:8px;margin-bottom:14px}
.ctrl-btn{flex:1;padding:10px;border-radius:10px;font-size:12px;cursor:pointer;text-align:center}
.eraser-slider{display:none;align-items:center;gap:10px;margin-bottom:14px;padding:10px 14px;background:rgba(255,204,0,.06);border:1px solid rgba(255,204,0,.2);border-radius:10px}
.ai-btn{width:100%;padding:11px;border-radius:10px;font-family:'Orbitron',monospace;font-size:12px;font-weight:700;letter-spacing:2px;cursor:pointer;margin-bottom:14px;transition:all .2s}
.self-grade-row{display:flex;gap:8px;margin-bottom:14px}
.sg-btn{flex:1;padding:9px 4px;background:rgba(255,255,255,.04);border-radius:10px;font-size:11px;cursor:pointer;text-align:center}
.feedback-card{border-radius:14px;padding:14px 16px;margin-bottom:14px;text-align:center;display:none;animation:pop .4s ease}
.fb-emoji{font-size:28px;margin-bottom:6px}
.fb-label{font-family:'Orbitron',monospace;font-size:14px;font-weight:700;letter-spacing:2px;margin-bottom:6px}
.fb-comment{font-size:13px;color:#7799aa;margin-bottom:12px}
.fb-answer{border-radius:10px;padding:12px 16px;background:rgba(0,245,255,.06);border:1px solid rgba(0,245,255,.2)}
.fb-char{font-family:serif;font-size:clamp(28px,8vw,44px);color:#00f5ff;letter-spacing:4px;text-shadow:0 0 16px rgba(0,245,255,.5)}
.fb-py{font-size:11px;color:#334d5c;margin-top:4px}
.next-btn2{display:none;width:100%;padding:14px;background:rgba(0,245,255,.08);border:1px solid #00f5ff;border-radius:13px;color:#00f5ff;font-family:'Orbitron',monospace;font-size:13px;font-weight:700;letter-spacing:3px;cursor:pointer;text-align:center;box-shadow:0 0 14px rgba(0,245,255,.2)}
.sum2-title{font-family:'Orbitron',monospace;font-size:clamp(14px,3.5vw,20px);font-weight:700;letter-spacing:2px;text-align:center;margin-bottom:6px}
.sum2-score{font-family:'Orbitron',monospace;font-weight:900;font-size:clamp(48px,12vw,76px);line-height:1;text-align:center;margin-bottom:6px}
.sum2-sub{font-size:12px;color:#ffa500;text-align:center;margin-bottom:6px}
.sum2-xp{font-size:13px;color:#44667a;text-align:center;margin-bottom:24px}
.sum2-list{background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.07);border-radius:16px;padding:16px 14px;margin-bottom:20px}
.s2row{display:flex;align-items:center;gap:12px;padding:9px 0;border-bottom:1px solid rgba(255,255,255,.05)}
.s2row:last-child{border-bottom:none}
.cx2-card{background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.08);border-radius:12px;padding:12px 14px;display:flex;align-items:center;gap:14px}

/* ── Dictation ── */
.speak-btn{display:block;width:100px;height:100px;border-radius:50%;background:rgba(255,165,0,.15);border:3px solid #ffa500;color:#ffa500;font-size:38px;cursor:pointer;margin:0 auto 10px}
.play-lbl{text-align:center;font-size:11px;color:#3d2800;margin-bottom:6px}
.hint-btn{display:block;margin:0 auto 16px;padding:5px 14px;background:transparent;border:1px solid rgba(136,68,255,.5);border-radius:20px;color:#8844ff;font-size:11px;cursor:pointer}
.hint-txt{text-align:center;font-size:16px;color:rgba(136,68,255,.8);letter-spacing:2px;margin-bottom:16px;min-height:24px}
.word-num{text-align:center;font-size:11px;color:#44667a;margin-bottom:14px}

/* ── dashboard (teacher) ── */
.dash-row{display:flex;align-items:center;gap:12px;padding:12px 14px;background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.07);border-radius:12px;margin-bottom:8px}
.dash-name{font-family:'Orbitron',monospace;font-size:12px;color:#cce0ee;flex:1}
.dash-xp{font-family:'Orbitron',monospace;font-size:14px;color:#00f5ff}
.session-row{display:flex;justify-content:space-between;font-size:11px;color:#44667a;padding:8px 0;border-bottom:1px solid rgba(255,255,255,.05)}
.session-row:last-child{border-bottom:none}