*{box-sizing:border-box;margin:0;padding:0}
:root{
  --navy:#000000;--navy2:#1e293b;--navy3:#334155;
  --text:#f1f5f9;--text2:#94a3b8;
  --sky:#38bdf8;--sky2:#0ea5e9;
  --green:#4ade80;--amber:#fbbf24;--red:#f87171;--purple:#a855f7;
  --orange:#f97316;--orange2:#ea6c0a;
}
body{font-family:'Segoe UI',system-ui,sans-serif;background:var(--navy);color:var(--text);min-height:100vh}
/* LOADING SCREEN */
#sloading.active{display:flex!important;align-items:center;justify-content:center;min-height:100vh}
.screen{display:none;min-height:100vh}
.screen.active{display:block}
h1{font-size:32px;font-weight:700}
h2{font-size:22px;font-weight:700}
h3{font-size:18px;font-weight:600}

/* BUTTONS */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 28px;border-radius:12px;border:none;font-size:17px;font-weight:700;cursor:pointer;transition:transform .1s,opacity .1s;font-family:inherit}
.btn:hover{opacity:.9}.btn:active{transform:scale(.97)}
.btn-blue{background:var(--sky2);color:#fff}
.btn-green{background:#16a34a;color:#fff}
.btn-ghost{background:var(--navy3);color:var(--text)}
.btn-amber{background:#b45309;color:#fef3c7}
.btn-sm{padding:8px 16px;font-size:14px;border-radius:8px}

/* NAVBAR */
.navbar{background:var(--navy2);padding:12px 20px;display:flex;align-items:center;gap:12px;border-bottom:1px solid var(--navy3);position:sticky;top:0;z-index:100}

/* CARDS */
.card{background:var(--navy2);border:1px solid var(--navy3);border-radius:16px;padding:20px}

/* XP BAR */
.xp-outer{background:var(--navy3);border-radius:20px;height:10px;overflow:hidden;flex:1}
.xp-inner{height:100%;border-radius:20px;background:linear-gradient(90deg,var(--sky2),var(--green));transition:width .6s ease}

/* BELT BADGE */
.belt-badge{display:inline-flex;align-items:center;gap:5px;padding:4px 12px;border-radius:20px;font-size:13px;font-weight:700}

/* LESSON CARDS */
.lesson-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:14px}
.lesson-card{background:var(--navy2);border:2px solid var(--navy3);border-radius:16px;padding:18px;cursor:pointer;transition:all .15s;text-align:center}
.lesson-card:hover:not(.locked){border-color:var(--sky);transform:translateY(-3px)}
.lesson-card.locked{opacity:.4;cursor:not-allowed;filter:grayscale(.5)}
.lesson-card.done{border-color:#22c55e}

/* STEP DOTS */
.step-dots{display:flex;gap:7px;align-items:center}
.step-dot{width:9px;height:9px;border-radius:50%;background:var(--navy3);transition:background .2s}
.step-dot.done{background:var(--green)}
.step-dot.active{background:var(--sky2);width:22px;border-radius:5px}

/* CODE EDITOR */
.code-area{font-family:'Courier New',monospace;font-size:14px;background:#020617;color:#7dd3fc;border:1.5px solid var(--navy3);border-radius:10px;padding:14px;width:100%;min-height:140px;resize:vertical;outline:none;line-height:1.8;tab-size:2}
.code-area:focus{border-color:var(--sky2)}

/* PREVIEW FRAME */
.preview{width:100%;min-height:200px;border:1.5px solid var(--navy3);border-radius:10px;background:#fff}

/* QUIZ OPTIONS */
.quiz-opt{width:100%;padding:15px 18px;background:var(--navy3);border:2px solid transparent;border-radius:12px;cursor:pointer;font-size:16px;text-align:left;color:var(--text);transition:all .15s;font-family:inherit;margin-bottom:10px;display:block}
.quiz-opt:hover:not(.done){border-color:var(--sky);background:#1e3a5f}
.quiz-opt.correct{background:#14532d;border-color:var(--green);cursor:default}
.quiz-opt.wrong{background:#450a0a;border-color:var(--red);cursor:default}
.quiz-opt.done{cursor:default}

/* DEV TIP */
.tip{background:#1e3a5f;border-left:4px solid var(--sky);border-radius:0 10px 10px 0;padding:14px 16px;margin:14px 0;font-size:15px;line-height:1.6}

/* SPLIT PANE */
.split{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:640px){.split{grid-template-columns:1fr}}

/* AVATAR GRID */
.avatar-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}
.av-btn{font-size:30px;background:var(--navy2);border:2px solid var(--navy3);border-radius:10px;padding:10px;cursor:pointer;transition:all .15s}
.av-btn:hover,.av-btn.sel{border-color:var(--sky);background:#1e3a5f}

/* RANK CARD */
.rank-card{background:var(--navy2);border:1px solid var(--navy3);border-radius:16px;padding:20px;display:flex;gap:16px;align-items:center;margin-bottom:24px}

/* CHECKLIST */
.check-item{display:flex;align-items:center;gap:10px;padding:8px 12px;border-radius:8px;margin-bottom:6px;font-size:14px;font-family:monospace}

/* CONFETTI CANVAS */
#cv{position:fixed;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:999}

/* WELCOME BIG */
.big-ninja{font-size:88px;display:block;text-align:center;animation:bob 2s ease-in-out infinite}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
@keyframes spin{to{transform:rotate(360deg)}}

/* CODE TAG INLINE */
.ct{font-family:monospace;background:#0c1a2e;color:#7dd3fc;padding:2px 6px;border-radius:5px;font-size:13px}

.container{max-width:920px;margin:0 auto;padding:24px 18px}

/* CELEBRATION */
.celebrate-xp{display:inline-block;background:#1e3a5f;border:2px solid var(--sky);border-radius:20px;padding:8px 22px;font-size:26px;font-weight:700;color:var(--sky);margin:12px 0}

/* ===== HOME SCREEN ===== */
.home-header{display:flex;align-items:center;gap:14px;padding:20px 18px 0}
.master-level-badge{display:inline-flex;align-items:center;gap:6px;padding:5px 14px;border-radius:20px;font-size:14px;font-weight:700;background:linear-gradient(135deg,#1e3a5f,#1e293b);border:2px solid var(--sky);color:var(--sky)}
.master-bar-wrap{padding:14px 18px 0}
.master-bar-label{display:flex;justify-content:space-between;font-size:13px;color:var(--text2);margin-bottom:6px}
.master-bar-outer{background:var(--navy3);border-radius:20px;height:12px;overflow:hidden}
.master-bar-inner{height:100%;border-radius:20px;background:linear-gradient(90deg,var(--sky2),var(--purple),var(--orange));transition:width .8s ease}
.door-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;padding:18px}
@media(max-width:480px){.door-grid{grid-template-columns:1fr}}
.door-card{background:var(--navy2);border:2px solid var(--navy3);border-radius:20px;padding:24px 18px;cursor:pointer;transition:all .18s;text-align:center}
.door-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(0,0,0,.4)}
.door-card.code{border-color:var(--sky2)}
.door-card.math{border-color:var(--orange)}
.door-icon{font-size:52px;margin-bottom:10px}
.door-title{font-size:20px;font-weight:700;margin-bottom:4px}
.door-sub{font-size:13px;color:var(--text2);margin-bottom:12px}
.door-xp-outer{background:var(--navy3);border-radius:20px;height:8px;overflow:hidden;margin-bottom:6px}
.door-xp-inner{height:100%;border-radius:20px;transition:width .6s ease}
.door-xp-label{font-size:12px;color:var(--text2)}
.badges-row{padding:0 18px 24px}
.badges-row h3{font-size:14px;color:var(--text2);font-weight:600;margin-bottom:10px}
.badges-list{display:flex;flex-wrap:wrap;gap:8px}
.badge-chip{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:20px;font-size:13px;font-weight:700;border:1.5px solid transparent}

/* ===== MATH ACADEMY ===== */
.math-stage-header{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.math-stage-bar{width:4px;height:30px;border-radius:4px}
.math-level-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:12px;margin-bottom:28px}
.math-level-card{background:var(--navy2);border:2px solid var(--navy3);border-radius:14px;padding:16px 12px;cursor:pointer;transition:all .15s;text-align:center}
.math-level-card:hover:not(.locked){transform:translateY(-2px);border-color:var(--orange)}
.math-level-card.current{border-color:var(--orange);box-shadow:0 0 0 3px rgba(249,115,22,.2)}
.math-level-card.done{border-color:#22c55e}
.math-level-card.locked{opacity:.35;cursor:not-allowed;filter:grayscale(.6)}
.math-level-num{font-size:11px;color:var(--text2);font-weight:700;margin-bottom:4px;text-transform:uppercase;letter-spacing:.05em}
.math-level-em{font-size:28px;margin-bottom:6px}
.math-level-name{font-size:13px;font-weight:700;margin-bottom:4px}
.math-level-xp{font-size:12px;color:var(--orange);font-weight:700}
.math-level-xp.done{color:var(--green)}

/* ===== WORKSHEET ===== */
.ws-header-info{background:var(--navy2);border-radius:14px;padding:14px 18px;margin-bottom:18px;display:flex;align-items:center;gap:14px}
.ws-problems{display:flex;flex-direction:column;gap:10px;margin-bottom:24px}
.ws-row{display:flex;align-items:center;gap:12px;background:var(--navy2);border:2px solid var(--navy3);border-radius:12px;padding:14px 16px;transition:border-color .2s}
.ws-row.correct{border-color:var(--green);background:#14532d22}
.ws-row.wrong{border-color:var(--red);background:#450a0a22}
.ws-num{font-size:13px;color:var(--text2);font-weight:700;width:24px;flex-shrink:0}
.ws-q{flex:1;font-size:17px;font-weight:600;line-height:1.4}
.ws-input{width:72px;padding:8px 10px;font-size:17px;font-weight:700;text-align:center;border-radius:8px;border:2px solid var(--navy3);background:var(--navy);color:var(--text);font-family:inherit;outline:none;-moz-appearance:textfield}
.ws-input::-webkit-outer-spin-button,.ws-input::-webkit-inner-spin-button{-webkit-appearance:none}
.ws-input:focus{border-color:var(--orange)}
.ws-input.correct{border-color:var(--green);background:#14532d}
.ws-input.wrong{border-color:var(--red);background:#450a0a;color:var(--red)}
.ws-feedback{font-size:14px;font-weight:700;width:28px;text-align:center;flex-shrink:0}
.ws-correct-ans{font-size:13px;color:var(--green);font-weight:700;flex-shrink:0}
.ws-score-card{background:var(--navy2);border-radius:16px;padding:24px;text-align:center;margin-bottom:24px}
.ws-score-num{font-size:52px;font-weight:700;margin-bottom:4px}
.ws-pass{color:var(--green)}.ws-fail{color:var(--amber)}
.ws-xp-pill{display:inline-block;background:#1e3a5f;border:2px solid var(--orange);border-radius:20px;padding:6px 20px;font-size:20px;font-weight:700;color:var(--orange);margin:10px 0}
.btn-orange{background:var(--orange);color:#fff}

/* ===== TIMER ===== */
.ws-timer-wrap{display:flex;align-items:center;gap:12px;background:var(--navy2);border-radius:14px;padding:12px 16px;margin-bottom:14px}
.ws-timer-text{font-size:22px;font-weight:700;font-family:monospace;min-width:54px;text-align:center;transition:color .3s}
.ws-timer-bar-outer{flex:1;background:var(--navy3);border-radius:20px;height:10px;overflow:hidden}
.ws-timer-bar{height:100%;border-radius:20px;background:var(--sky);transition:width 1s linear,background .5s}
.ws-timer-bar.urgent{background:var(--red)}

/* ===== SPEED BONUS ===== */
.ws-speed-pill{display:inline-block;border-radius:20px;padding:6px 18px;font-size:15px;font-weight:700;margin:6px 0}

/* ===== STREAK ===== */
.streak-chip{display:inline-flex;align-items:center;gap:5px;padding:4px 12px;border-radius:20px;font-size:13px;font-weight:700;background:#431407;color:var(--orange);border:1.5px solid var(--orange2)}

/* ===== MILESTONE BANNER ===== */
.milestone-banner{background:linear-gradient(135deg,#431407,#7c2d12);border:2px solid var(--orange);border-radius:14px;padding:16px;text-align:center;margin-top:12px}

/* ===== REPORT CARD ===== */
.report-stat-row{display:flex;gap:16px;margin-bottom:20px}
.report-stat{flex:1;background:var(--navy2);border:1px solid var(--navy3);border-radius:14px;padding:16px;text-align:center}
.report-stat-num{font-size:40px;font-weight:700;margin-bottom:4px}
.report-stat-label{font-size:13px;color:var(--text2)}
.report-stage-card{background:var(--navy2);border:1px solid var(--navy3);border-radius:16px;padding:18px;margin-bottom:14px}
.report-stage-title{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.report-prog-outer{background:var(--navy3);border-radius:20px;height:10px;overflow:hidden;margin:6px 0 10px}
.report-prog-inner{height:100%;border-radius:20px;transition:width .6s ease}
.report-details{display:flex;gap:20px;font-size:13px;color:var(--text2);flex-wrap:wrap}

/* ===== CODE ACADEMY TABS ===== */
.ca-tabs{display:flex;background:var(--navy2);border-bottom:1px solid var(--navy3);padding:0 18px;gap:4px}
.ca-tab{background:none;border:none;color:var(--text2);font-size:14px;font-weight:700;padding:14px 16px;cursor:pointer;border-bottom:3px solid transparent;font-family:inherit;transition:color .15s,border-bottom-color .15s;white-space:nowrap}
.ca-tab:hover:not(.locked):not(.active){color:var(--text);border-bottom-color:var(--navy3)}
.ca-tab.active{color:var(--sky);border-bottom-color:var(--sky)}
.ca-tab.locked{opacity:.4;cursor:not-allowed;pointer-events:none}
.ca-panel{display:none}
.ca-panel.active{display:block}

/* ===== BEGINNING SESSION PROGRESS ===== */
.bs-progress-wrap{background:var(--navy2);border:1px solid var(--navy3);border-radius:14px;padding:16px 18px;margin-bottom:20px}
.bs-progress-label{display:flex;justify-content:space-between;font-size:13px;margin-bottom:8px}
.bs-progress-outer{background:var(--navy3);border-radius:20px;height:10px;overflow:hidden}
.bs-progress-inner{height:100%;border-radius:20px;background:linear-gradient(90deg,var(--sky2),var(--green));transition:width .6s ease}
.bs-progress-inner.complete{background:var(--green)}

/* ===== LOCKED PANEL CARD ===== */
.locked-panel-card{background:var(--navy2);border:2px dashed var(--navy3);border-radius:20px;padding:48px 24px;text-align:center;margin-top:20px}

/* ===== FREE PLAY — PROJECT LIST ===== */
.fp-coming-notice{background:#2d1b6933;border:1px solid #a855f766;border-radius:12px;padding:12px 16px;font-size:13px;color:#a855f7;margin-bottom:16px;text-align:center}
.fp-new-btn{width:100%;display:flex;align-items:center;justify-content:center;gap:10px;padding:14px 20px;background:#7c3aed;color:#fff;border:none;border-radius:12px;font-size:16px;font-weight:700;cursor:pointer;font-family:inherit;margin-bottom:20px;transition:opacity .15s}
.fp-new-btn:hover{opacity:.9}
.fp-project-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px;margin-bottom:28px}
.fp-project-card{background:var(--navy2);border:2px solid var(--navy3);border-radius:16px;padding:18px;cursor:pointer;transition:all .15s}
.fp-project-card:hover{border-color:#a855f7;transform:translateY(-2px)}
.fp-project-em{font-size:36px;margin-bottom:8px}
.fp-project-title{font-weight:700;font-size:15px;margin-bottom:4px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.fp-project-date{font-size:12px;color:var(--text2);margin-bottom:12px}
.fp-project-actions{display:flex;gap:8px}
.fp-project-btn{background:var(--navy3);border:none;border-radius:8px;padding:6px 12px;font-size:12px;font-weight:700;cursor:pointer;color:var(--text);font-family:inherit;transition:background .15s}
.fp-project-btn:hover{background:#475569}
.fp-project-btn.danger{color:var(--red)}
.fp-project-btn.danger:hover{background:#450a0a}
.fp-empty-state{text-align:center;padding:60px 24px;color:var(--text2)}
/* ===== FREE PLAY — TEMPLATE MODAL ===== */
.fp-modal{background:var(--navy2);border:1px solid var(--navy3);border-radius:20px;padding:28px;max-width:500px;width:100%;max-height:90vh;overflow-y:auto}
.fp-template-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:16px 0 20px}
.fp-template-card{background:var(--navy);border:2px solid var(--navy3);border-radius:14px;padding:18px 12px;cursor:pointer;text-align:center;transition:all .15s;font-family:inherit;width:100%}
.fp-template-card:hover{border-color:#a855f7;transform:translateY(-2px)}
.fp-template-em{font-size:36px;margin-bottom:8px}
.fp-template-name{font-size:14px;font-weight:700;color:var(--text)}
/* ===== FREE PLAY — EDITOR SCREEN ===== */
#sfp{flex-direction:column;height:100vh;overflow:hidden}
.fp-toolbar{background:var(--navy2);border-bottom:1px solid var(--navy3);padding:10px 16px;display:flex;align-items:center;gap:10px;flex-shrink:0}
.fp-title-input{flex:1;min-width:0;background:transparent;border:none;color:var(--text);font-size:16px;font-weight:700;font-family:inherit;outline:none;padding:6px 8px;border-radius:8px}
.fp-title-input:focus{background:var(--navy3)}
.fp-toolbar-btn{background:var(--navy3);border:none;border-radius:8px;padding:8px 14px;font-size:13px;font-weight:700;cursor:pointer;color:var(--text);font-family:inherit;white-space:nowrap;transition:background .15s;flex-shrink:0}
.fp-toolbar-btn:hover{background:#475569}
.fp-toolbar-btn.save{background:#5b21b6;color:#fff}
.fp-toolbar-btn.save:hover{background:#7c3aed}
.fp-toolbar-btn.danger{color:var(--red)}
.fp-toolbar-btn.danger:hover{background:#450a0a}
.fp-editor-tabs{background:var(--navy2);border-bottom:1px solid var(--navy3);padding:0 16px;display:flex;align-items:center;gap:4px;flex-shrink:0}
.fp-etab{background:none;border:none;color:var(--text2);font-size:13px;font-weight:700;padding:10px 14px;cursor:pointer;border-bottom:3px solid transparent;font-family:inherit;transition:color .15s,border-bottom-color .15s}
.fp-etab.active{color:#a855f7;border-bottom-color:#a855f7}
.fp-etab:hover:not(.active){color:var(--text)}
.fp-editor-body{display:flex;flex:1;overflow:hidden;min-height:0}
.fp-code-wrap{display:flex;flex-direction:column;flex:1;min-width:0;border-right:1px solid var(--navy3)}
.fp-code-label{font-size:11px;color:var(--text2);padding:6px 12px;background:var(--navy2);font-weight:700;text-transform:uppercase;letter-spacing:.05em;flex-shrink:0}
.fp-code-area{flex:1;min-height:0;font-family:'Courier New',monospace;font-size:13px;background:#020617;color:#7dd3fc;border:none;padding:14px;resize:none;outline:none;line-height:1.7;tab-size:2;width:100%}
.fp-preview-wrap{display:flex;flex-direction:column;flex:1;min-width:0}
.fp-preview-label{font-size:11px;color:var(--text2);padding:6px 12px;background:var(--navy2);font-weight:700;text-transform:uppercase;letter-spacing:.05em;flex-shrink:0}
.fp-preview{flex:1;min-height:0;border:none;background:#fff;width:100%}
@media(max-width:640px){.fp-editor-body{flex-direction:column}.fp-code-wrap,.fp-preview-wrap{flex:none;height:50%;min-height:0}}

/* ===== CHALLENGE RUNS ===== */
/* Hub */
.cr-hub-header{text-align:center;padding:24px 0 16px}
.cr-best-banner{display:inline-block;background:#450a0a33;border:1px solid var(--red);border-radius:20px;padding:6px 18px;font-size:13px;color:var(--red);margin-top:6px}
.cr-ep-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:12px;margin-bottom:24px}
.cr-ep-card{border:2px solid var(--navy3);border-radius:14px;padding:16px 12px;text-align:center;transition:transform .15s}
.cr-ep-card:hover{transform:translateY(-2px)}
.cr-start-btn{display:inline-block;background:var(--red);color:#fff;border:none;border-radius:14px;padding:16px 40px;font-size:20px;font-weight:700;cursor:pointer;font-family:inherit;transition:opacity .15s;box-shadow:0 4px 20px rgba(248,113,113,.3)}
.cr-start-btn:hover{opacity:.9}

/* 3-Timer bar */
.cr-timer-bar{display:flex;align-items:center;justify-content:center;gap:8px;background:var(--navy2);border-bottom:2px solid #450a0a;padding:10px 16px;flex-wrap:wrap}
.cr-timer-box{display:inline-flex;align-items:center;gap:6px;background:var(--navy3);border-radius:10px;padding:8px 14px;font-size:16px;font-weight:700;font-family:monospace;transition:color .3s,background .3s;white-space:nowrap}
.cr-timer-urgent{color:var(--red)!important;background:#450a0a!important;box-shadow:0 0 8px rgba(248,113,113,.3)}

/* Active lesson */
.cr-ep-label{font-size:13px;color:var(--red);font-weight:700}
.cr-score-pill{background:#450a0a33;border:1px solid var(--red);border-radius:20px;padding:4px 12px;font-size:13px;font-weight:700;color:var(--red)}
.cr-lesson-header{display:flex;align-items:center;gap:10px;background:#450a0a22;border-left:4px solid var(--red);border-radius:0 10px 10px 0;padding:12px 14px;margin-bottom:20px}
.cr-lesson-badge{background:var(--red);color:#fff;border-radius:20px;padding:3px 10px;font-size:11px;font-weight:700;white-space:nowrap}

/* Results */
.cr-result-card{background:var(--navy2);border:2px solid var(--navy3);border-radius:20px;padding:32px 24px;text-align:center;margin:0 auto;max-width:560px}
.cr-result-big{font-size:52px;font-weight:700;color:var(--red);margin:8px 0}
.cr-xp-pill{display:inline-block;background:#1e3a5f;border:2px solid var(--sky);border-radius:20px;padding:6px 20px;font-size:18px;font-weight:700;color:var(--sky);margin:6px 0}

/* Score display in navbar */
#cr-score-display{font-size:13px;font-weight:700;color:var(--red)}

/* =====================================================================
   04.00 — bilingual multi-topic rebuild
   ===================================================================== */
html{-webkit-text-size-adjust:100%}
body{display:flex;flex-direction:column}
body>.screen{flex:1 0 auto}
button{font-family:inherit;color:inherit}
:focus-visible{outline:3px solid var(--sky);outline-offset:2px}
.muted{color:var(--text2)}
.small{font-size:13px}
.tiny{font-size:12px}
.nowrap{white-space:nowrap}
.ellipsis{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.sky{color:var(--sky)}
.amber{color:var(--amber)}
.amber-dim{color:#d97706;margin-top:6px}
.red{color:var(--red)!important}
.wide{width:100%}
.big{font-size:19px}
.label{color:var(--text2);font-size:13px;margin-bottom:6px;font-weight:600;letter-spacing:.02em}
.btn-purple{background:#7c3aed;color:#fff}
.btn-orange{background:var(--orange2);color:#fff}
.link-btn{background:none;border:none;color:var(--text2);font-size:13px;cursor:pointer;text-decoration:underline;margin-top:14px;padding:6px}
.link-btn:disabled{text-decoration:none;cursor:default}

/* layout bits */
.center-col{text-align:center;display:flex;flex-direction:column;align-items:center}
.narrow{max-width:520px;margin:0 auto;padding:0 18px 32px;display:flex;flex-direction:column;gap:16px}
.bob{animation:bob 1.6s ease-in-out infinite;margin-bottom:16px;max-width:60vw;height:auto}
.spinner{margin:20px auto 0;width:48px;height:48px;border:4px solid var(--navy3);border-top-color:var(--sky2);border-radius:50%;animation:spin .8s linear infinite}
.brand-title{color:var(--sky);margin-bottom:10px}
.hero-title{font-size:clamp(28px,7vw,38px);margin:12px 0 10px;line-height:1.15}
.hero-sub{color:var(--text2);font-size:18px;margin-bottom:10px}
.mascot{display:block;margin:0 auto 8px;border-radius:24px;height:auto}
.login-box{max-width:360px;width:100%;margin:28px auto 0}
.google-btn{width:100%;display:flex;align-items:center;justify-content:center;gap:14px;padding:16px 24px;background:#fff;color:#1f2937;border:none;border-radius:14px;font-size:18px;font-weight:700;cursor:pointer;transition:opacity .15s}
.google-btn:hover{opacity:.92}
.dev-only{display:none!important}
body.dev-auth .dev-only{display:inline-flex!important}
.card-h{margin-bottom:14px;font-size:19px}
.text-input{width:100%;padding:14px;font-size:18px;border-radius:10px;border:2px solid var(--navy3);background:var(--navy);color:var(--text);outline:none;font-family:inherit}
.text-input:focus{border-color:var(--sky)}
.text-input.invalid{border-color:var(--red)}
.age-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}
.age-btn{font-size:22px;font-weight:700;background:var(--navy2);border:2px solid var(--navy3);border-radius:10px;padding:12px 0;cursor:pointer;transition:all .15s}
.age-btn:hover,.age-btn.sel{border-color:var(--amber);background:#422006}
.avatar-grid{grid-template-columns:repeat(6,1fr)}
@media(max-width:420px){.avatar-grid{grid-template-columns:repeat(4,1fr)}}

/* navbar items */
.nav-icon{background:none;border:none;color:var(--text2);cursor:pointer;font-size:22px;padding:2px 6px}
.nav-av,.nav-em{font-size:24px;display:inline-flex;align-items:center}
.nav-title{font-weight:700;font-size:17px;flex:1;min-width:0}
.nav-xp{color:var(--text2);font-size:13px;white-space:nowrap}
.xp-pill-sm{background:#1e3a5f;color:var(--sky);padding:4px 10px;border-radius:20px;font-size:13px;font-weight:700;white-space:nowrap}
.xp-pill-orange{background:#431407;color:var(--orange);padding:4px 10px;border-radius:20px;font-size:13px;font-weight:700;white-space:nowrap}
@media(max-width:520px){.navbar{padding:10px 12px;gap:8px}.nav-xp{display:none}.step-dots{display:none}}

/* home */
.avatar-xl{font-size:44px;line-height:1;display:inline-flex}
.home-name{font-size:20px;font-weight:700;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.chip-row{display:flex;gap:8px;align-items:center;margin-top:4px;flex-wrap:wrap}
.header-actions{display:flex;gap:6px;align-items:center}
.streak-chip{display:inline-flex;align-items:center;gap:4px;padding:4px 10px;border-radius:20px;font-size:13px;font-weight:700;background:#431407;color:var(--orange);border:1.5px solid #9a3412}
.section-hint{padding:18px 18px 0;color:var(--text2);font-size:15px}
.door-grid{grid-template-columns:repeat(auto-fill,minmax(210px,1fr))}
@media(max-width:480px){.door-grid{grid-template-columns:1fr 1fr;gap:12px;padding:14px}}
.door-card{--c:var(--sky);border-color:color-mix(in srgb,var(--c) 55%,transparent);position:relative;display:flex;flex-direction:column;align-items:center;width:100%;color:var(--text);font:inherit}
.door-card:hover{border-color:var(--c)}
.door-title{color:var(--c)}
.door-desc{font-size:12px;color:var(--text2);margin-bottom:8px;min-height:2.4em}
.door-sub{margin-bottom:10px;color:var(--text)}
.door-xp-outer{width:100%}
.door-xp-inner{background:var(--c)}
.door-ai{margin-top:8px;font-size:12px;font-weight:700;color:#c4b5fd;background:#4c1d9555;border:1px solid #7c3aed;border-radius:20px;padding:3px 10px}
@media(max-width:480px){.door-card{padding:16px 10px}.door-icon{font-size:40px}.door-title{font-size:16px}}

/* belts / levels */
.belt-section{margin-bottom:30px}
.belt-head{display:flex;align-items:center;gap:12px;margin-bottom:14px;flex-wrap:wrap}
.belt-head h2{font-size:20px}
.belt-stripe{width:4px;height:30px;border-radius:4px;flex:none}
.pill-ok{background:#14532d;color:var(--green);padding:3px 10px;border-radius:20px;font-size:12px}
.pill-lock{background:var(--navy3);color:var(--text2);padding:3px 10px;border-radius:20px;font-size:12px}
.lesson-card{color:var(--text);font:inherit;width:100%}
.lesson-card.challenge{border-color:#b45309}
.lesson-card.challenge .lesson-kind{color:#fde68a}
.lesson-em{font-size:34px;margin-bottom:8px}
.lesson-title{font-weight:700;font-size:15px;margin-bottom:5px}
.lesson-kind{font-size:12px;color:var(--text2);margin-bottom:8px}
.lesson-xp{font-size:13px;font-weight:700;color:var(--sky)}
.rank-top{display:flex;align-items:center;gap:10px;margin-bottom:6px;flex-wrap:wrap}
.rank-name{font-size:19px;font-weight:700}
.rank-bar-row{display:flex;align-items:center;gap:10px;margin-bottom:6px}
.track-hero{display:flex;gap:18px;align-items:center;margin-bottom:26px}
.track-hero h1{font-size:28px;margin-bottom:6px}
.track-hero-em{font-size:52px;width:92px;height:92px;flex:none;display:flex;align-items:center;justify-content:center;border-radius:24px;border:2px solid}
@media(max-width:480px){.track-hero{flex-direction:column;text-align:center}}

/* lesson */
.step-icon{text-align:center;font-size:52px;margin-bottom:12px}
.step-title{text-align:center;margin-bottom:14px;line-height:1.3}
.read-body{font-size:17px;line-height:1.85}
.hint{background:#1e3a5f;border-radius:8px;padding:10px 14px;margin-bottom:14px;font-size:14px;color:var(--sky)}
.lesson-nav{display:flex;gap:12px;justify-content:center;margin-top:28px;padding-bottom:32px;flex-wrap:wrap}
.listen-btn{display:block;margin:0 auto 16px;background:var(--navy2);border:1.5px solid var(--navy3);color:var(--text2);border-radius:20px;padding:6px 14px;font-size:14px;cursor:pointer}
.listen-btn:hover{color:var(--text);border-color:var(--sky)}
.feedback{border-radius:10px;padding:14px;font-size:16px;line-height:1.5}
.feedback.ok{background:#14532d;color:var(--green)}
.feedback.bad{background:#450a0a;color:var(--red)}
.check-item{background:#450a0a33}
.check-item.ok{background:#14532d33}
.check-item code{color:var(--text2);font-size:14px}
.check-item.ok code{color:var(--green)}
.quiz-opt{color:var(--text)}
.quiz-opt:disabled{opacity:1}

/* celebrate */
.celebrate-screen{text-align:center;min-height:100vh;align-items:center;justify-content:center;flex-direction:column}
.cel-em{font-size:72px;margin-bottom:12px}
.cel-title{font-size:clamp(28px,7vw,38px);margin-bottom:10px}
.cel-sub{font-size:18px;color:var(--text2);margin-bottom:6px}
.beltup-card{background:var(--navy2);border:2px solid var(--amber);border-radius:16px;padding:22px;max-width:380px;margin:16px auto}
.beltup-em{font-size:52px;margin-bottom:8px}

/* AI missions */
.ai-card{margin:10px 0 34px;padding:26px 22px;border-radius:20px;text-align:center;background:linear-gradient(135deg,#2e1065,#1e1b4b);border:2px solid #7c3aed}
.ai-card h2{margin:6px 0 8px}
.ai-card p{color:#ddd6fe;margin-bottom:16px;line-height:1.6;max-width:560px;margin-left:auto;margin-right:auto}
.ai-card.locked{background:var(--navy2);border-color:var(--navy3)}
.ai-card.locked p{color:var(--text2)}
.ai-card-em{font-size:40px}
.ai-card-bar{background:var(--navy3);border-radius:20px;height:10px;overflow:hidden;max-width:320px;margin:0 auto 8px}
.ai-card-bar>div{height:100%;border-radius:20px;background:linear-gradient(90deg,#7c3aed,#c084fc);transition:width .6s}
.ai-level-pill{background:#4c1d95;color:#e9d5ff;padding:4px 12px;border-radius:20px;font-size:13px;font-weight:700;white-space:nowrap}
.ai-progress{margin-bottom:18px}
.ai-progress-label{display:flex;justify-content:space-between;font-size:13px;color:var(--text2);margin-bottom:6px}
.ai-progress-outer{background:var(--navy3);border-radius:20px;height:10px;overflow:hidden}
.ai-progress-inner{height:100%;border-radius:20px;background:linear-gradient(90deg,#7c3aed,#c084fc);transition:width .6s}
.ai-question-card{background:var(--navy2);border:1px solid var(--navy3);border-radius:18px;padding:22px 18px}
.ai-meta{display:flex;justify-content:space-between;align-items:center;color:var(--text2);font-size:13px;margin-bottom:12px;gap:10px}
.ai-meta .listen-btn{margin:0}
.ai-code{background:#020617;color:#7dd3fc;border-radius:10px;padding:14px;font-size:14px;line-height:1.7;overflow-x:auto;margin-bottom:16px;white-space:pre}
.ai-after{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:14px}
.ai-levelup{background:#4c1d95;color:#f5d0fe;border-radius:20px;padding:4px 12px;font-weight:700;font-size:14px}
.ai-wait{text-align:center;padding:50px 16px}
.ai-wait h2{margin:12px 0 8px}
.ai-wait .btn{margin-top:18px}
.ai-think{font-size:64px;animation:bob 1.4s ease-in-out infinite}

/* report */
.report-stat-row{grid-template-columns:repeat(4,1fr)}
@media(max-width:560px){.report-stat-row{grid-template-columns:1fr 1fr}}
.report-h{font-size:18px;margin:26px 0 12px}
.report-line{display:flex;justify-content:space-between;font-size:14px;color:var(--text2);margin-bottom:2px}
.danger-zone{text-align:center;margin:30px 0 10px}

/* modal + toast */
.modal-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.75);z-index:400;align-items:center;justify-content:center;padding:20px}
.toast{position:fixed;left:50%;bottom:72px;transform:translateX(-50%) translateY(20px);background:var(--navy2);border:1.5px solid var(--sky2);color:var(--text);padding:12px 18px;border-radius:12px;font-size:15px;z-index:500;opacity:0;pointer-events:none;transition:all .25s;max-width:calc(100% - 32px);text-align:center}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* challenge run bits */
.cr-row{display:flex;justify-content:space-between;padding:8px 12px;background:var(--navy3);border-radius:8px;font-size:14px;margin-bottom:6px}
.cr-xp-pill.amber{border-color:var(--amber);color:var(--amber)}

/* worksheet */
.ws-actions{display:flex;gap:12px;justify-content:center;padding-bottom:40px;flex-wrap:wrap}

/* footer — every screen */
.site-footer{flex:none;display:flex;flex-wrap:wrap;gap:8px;align-items:center;justify-content:center;padding:16px 16px 20px;color:var(--text2);font-size:12px;border-top:1px solid var(--navy2)}
.footer-sep{opacity:.5}
.lang-toggle{background:var(--navy2);border:1.5px solid var(--navy3);border-radius:20px;padding:4px 12px;font-size:12px;font-weight:700;cursor:pointer;color:var(--text2)}
.lang-toggle .on{color:var(--sky)}
.lang-toggle:hover{border-color:var(--sky)}

@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
.age-row{display:flex;gap:12px;align-items:center;justify-content:center;margin:26px 0 0;flex-wrap:wrap}