*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}
:root{
  --green:#58CC02;--green-dark:#58A700;--green-darker:#4A8E00;
  --blue:#1CB0F6;--blue-dark:#1899D6;
  --yellow:#FFC800;--yellow-dark:#E5A917;
  --red:#FF4B4B;--red-dark:#E04141;
  --purple:#CE82FF;--purple-dark:#B266E9;
  --orange:#FF9600;
  --text:#4B4B4B;--text-light:#777;
  --bg:#FFF;--bg-light:#F7F7F7;--bg-soft:#E5E5E5;--border:#E5E5E5;
  --mod-a:#58CC02;--mod-b:#1CB0F6;--mod-c:#FF9600;--mod-d:#CE82FF;--mod-e:#FFC800;--mod-f:#FF4B4B;
}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg-light);color:var(--text);font-weight:700;min-height:100vh;overflow-x:hidden}
.app{max-width:520px;margin:0 auto;background:var(--bg);min-height:100vh;position:relative;padding-bottom:80px}

.topbar{display:flex;justify-content:space-between;align-items:center;padding:14px 16px;background:#FFF;border-bottom:2px solid var(--border);position:sticky;top:0;z-index:10}
.topbar-item{display:flex;align-items:center;gap:5px;font-size:16px;font-weight:800}
.streak{color:var(--orange)}.xp{color:var(--blue)}
.title-bar{flex:1;text-align:center;font-size:14px;font-weight:900;color:#5A6B7E;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;padding:0 8px}

.btn{border:none;border-radius:16px;padding:14px 24px;font-size:16px;font-weight:800;cursor:pointer;
  text-transform:uppercase;letter-spacing:0.5px;font-family:inherit;transition:all 0.1s;user-select:none;
  position:relative;display:inline-flex;align-items:center;justify-content:center;gap:8px}
.btn-primary{background:var(--green);color:#FFF;box-shadow:0 4px 0 var(--green-darker)}
.btn-primary:active{transform:translateY(2px);box-shadow:0 2px 0 var(--green-darker)}
.btn-secondary{background:var(--blue);color:#FFF;box-shadow:0 4px 0 var(--blue-dark)}
.btn-secondary:active{transform:translateY(2px);box-shadow:0 2px 0 var(--blue-dark)}
.btn-ghost{background:#FFF;color:var(--text-light);border:2px solid var(--border);box-shadow:0 4px 0 var(--border)}
.btn-ghost:active{transform:translateY(2px);box-shadow:0 2px 0 var(--border)}
.btn-warn{background:var(--red);color:#FFF;box-shadow:0 4px 0 var(--red-dark)}
.btn-full{width:100%}.btn-large{font-size:18px;padding:16px 24px}

.hero{text-align:center;padding:20px 16px 16px}
.hero-emoji{font-size:56px;line-height:1}
.hero-title{font-size:22px;font-weight:900;margin:12px 0 4px}
.hero-sub{font-size:14px;color:var(--text-light);font-weight:700}

.module-strip{display:flex;flex-wrap:wrap;gap:6px;padding:8px 16px;justify-content:flex-start}
.module-strip::-webkit-scrollbar{display:none}
.mod-btn{flex-shrink:0;padding:7px 11px;border-radius:12px;background:var(--bg-light);font-size:12px;font-weight:900;cursor:pointer;border:2px solid transparent;transition:all 0.15s;white-space:nowrap}
.mod-btn.active{background:#FFF;border-color:currentColor}
.mod-btn.mod-A{color:var(--mod-a)}.mod-btn.mod-B{color:var(--mod-b)}.mod-btn.mod-C{color:var(--mod-c)}
.mod-btn .pass-mini{display:inline-block;margin-left:4px;color:#2E8B57;font-weight:900}
.mod-review-card{background:linear-gradient(135deg,#FFF8E7 0%,#FFF1D0 100%);border:3px dashed #D4A93C;border-radius:16px;padding:16px;margin:8px 16px 12px;cursor:pointer;position:relative;overflow:hidden;transition:transform 0.15s}
.mod-review-card:hover{transform:translateY(-2px)}
.mod-review-card.passed{background:linear-gradient(135deg,#E8F5E9 0%,#C8E6C9 100%);border:3px solid #2E8B57}
.mod-review-card .mr-icon{font-size:28px}
.mod-review-card .mr-title{font-size:16px;font-weight:900;margin:8px 0 4px;color:#1B3A6B}
.mod-review-card .mr-desc{font-size:12px;color:#5A6B7E;font-weight:600;line-height:1.4}
.mod-review-card .mr-stamp{position:absolute;top:50%;right:16px;transform:translateY(-50%) rotate(-12deg);font-size:22px;font-weight:900;color:#2E8B57;border:3px solid #2E8B57;padding:6px 14px;border-radius:6px;letter-spacing:2px;background:rgba(255,255,255,0.85)}
.mod-review-card.passed .mr-meta{color:#2E8B57;font-weight:900;font-size:13px;margin-top:6px}
.bank-card{background:linear-gradient(135deg,#FFEBEE 0%,#FFCDD2 100%);border:3px dashed #C62828;border-radius:16px;padding:16px;margin:8px 16px 12px;cursor:pointer;position:relative;transition:transform 0.15s}
.bank-card.empty{background:linear-gradient(135deg,#F5F5F5 0%,#EEEEEE 100%);border:3px dashed #BFBFBF;cursor:default;opacity:0.85}
.bank-card:hover:not(.empty){transform:translateY(-2px)}
.bank-card .bk-icon{font-size:28px}
.bank-card .bk-title{font-size:16px;font-weight:900;margin:8px 0 4px;color:#1B3A6B}
.bank-card.empty .bk-title{color:#5A6B7E}
.bank-card .bk-desc{font-size:12px;color:#5A6B7E;font-weight:600;line-height:1.4}
.bank-card .bk-cta{margin-top:8px;font-size:13px;font-weight:900;color:#C62828}
.bank-item{background:#FFF;border:2px solid var(--border);border-radius:14px;padding:12px;margin-bottom:8px;cursor:pointer;transition:transform 0.12s}
.bank-item:hover{transform:translateY(-1px);border-color:#C62828}
.bank-item .bk-row{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px;flex-wrap:wrap;gap:4px}
.bank-item .bk-src{font-size:11px;font-weight:900;color:#C62828;background:#FFEBEE;padding:3px 8px;border-radius:8px}
.bank-item .bk-word{font-size:15px;font-weight:900;color:#1B3A6B}
.bank-item .bk-pos{font-size:11px;color:#8A8A8A;font-weight:700}
.bank-item .bk-stem{font-size:13px;color:#555;line-height:1.4;margin-bottom:6px}
.bank-item .bk-action{font-size:12px;font-weight:900;color:#2E8B57;text-align:right}
.ch-progress-wrap{margin-top:8px;height:10px;background:#EEE;border-radius:6px;overflow:hidden;position:relative;border:1px solid #DDD}
.ch-progress-fill{height:100%;border-radius:6px;transition:width 0.5s ease-out;background:linear-gradient(90deg,#4ECDC4 0%,#56C572 50%,#2E8B57 100%)}
.ch-progress-fill.full{background:linear-gradient(90deg,#FFD700,#FFA500)}
.ch-progress-fill.empty{background:#BBB}
.ch-progress-text{position:absolute;top:0;left:0;width:100%;height:100%;text-align:center;font-size:9px;line-height:10px;font-weight:900;color:#1B3A6B;text-shadow:0 0 2px rgba(255,255,255,0.7)}
.mark-btn{position:absolute;top:12px;right:12px;background:transparent;border:none;font-size:24px;cursor:pointer;padding:6px;line-height:1;border-radius:8px;color:#D4A93C}
.mark-btn:hover{background:#FFF8E0}
.mode-picker-modal{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,0.6);display:flex;align-items:center;justify-content:center;z-index:9999;padding:20px}
.mode-picker-inner{background:#FFF;border-radius:20px;padding:24px 18px;max-width:380px;width:100%;text-align:center;box-shadow:0 12px 40px rgba(0,0,0,0.25)}
.mode-picker-title{font-size:18px;font-weight:900;color:#1B3A6B;margin-bottom:6px}
.mode-picker-sub{font-size:13px;color:#5A6B7E;margin-bottom:18px;font-weight:600}
.mode-picker-btn{display:block;width:100%;padding:14px 16px;margin-bottom:10px;border:2px solid var(--border);border-radius:14px;font-size:14px;font-weight:900;cursor:pointer;background:#FFF;text-align:left;transition:all 0.15s;color:#1B3A6B}
.mode-picker-btn:hover{border-color:#4ECDC4;background:#F0FCFF}
.mode-picker-btn .mp-desc{display:block;font-size:11px;color:#5A6B7E;font-weight:600;margin-top:4px}
.mode-picker-btn.disabled{opacity:0.5;cursor:not-allowed;background:#F8F8F8}
.mode-picker-close{margin-top:8px;color:#8A8A8A;font-size:12px;font-weight:700;cursor:pointer;text-decoration:underline}
.leaderboard-table{background:#FFF;border:2px solid var(--border);border-radius:14px;margin:8px 16px;overflow:hidden}
.lb-row{display:flex;padding:10px 14px;border-bottom:1px solid #EEE;font-size:13px;align-items:center}
.lb-row:last-child{border-bottom:none}
.lb-row.me{background:#FFF8E0;font-weight:900}
.lb-rank{width:30px;font-weight:900;color:#D4A93C}
.lb-rank.top{color:#FFD700;font-size:18px}
.lb-name{flex:1;font-weight:900;color:#1B3A6B}
.lb-score{font-weight:900;color:#2E8B57}
.lb-meta{font-size:10px;color:#8A8A8A;margin-left:8px;font-weight:600}
.lb-podium{display:flex;align-items:flex-end;justify-content:center;gap:6px;padding:18px 16px 0;margin:0 16px 8px;background:linear-gradient(180deg,#FFF8E0 0%,#FFFFFF 100%);border:2px solid #D4A93C;border-radius:18px}
.lb-podium-col{flex:1;display:flex;flex-direction:column;align-items:center;max-width:120px}
.lb-podium-name{font-size:13px;font-weight:900;color:#1B3A6B;margin-bottom:2px;text-align:center;word-break:break-word;line-height:1.2}
.lb-podium-name.me{color:#C62828}
.lb-podium-score{font-size:14px;font-weight:900;color:#2E8B57;margin-bottom:4px}
.lb-podium-step{width:100%;border-radius:10px 10px 0 0;display:flex;flex-direction:column;align-items:center;justify-content:center;box-shadow:0 -4px 12px rgba(0,0,0,0.12);position:relative}
.lb-podium-rank-num{font-size:28px;font-weight:900;color:#FFF;text-shadow:1px 1px 3px rgba(0,0,0,0.35);line-height:1;margin-top:8px}
.lb-podium-label{font-size:10px;font-weight:900;color:#FFF;letter-spacing:1px;text-shadow:1px 1px 2px rgba(0,0,0,0.3);margin-top:4px}
.login-overlay{position:fixed;inset:0;background:rgba(20,30,50,0.92);display:flex;align-items:center;justify-content:center;z-index:99999;padding:24px}
.login-box{background:#FFF;border-radius:20px;padding:28px 24px;max-width:380px;width:100%;box-shadow:0 20px 60px rgba(0,0,0,0.35);text-align:center}
.login-title{font-size:22px;font-weight:900;color:#1B3A6B;margin-bottom:6px}
.login-sub{font-size:13px;color:#5A6B7E;margin-bottom:20px;font-weight:600}
.login-user-chip{display:inline-block;background:#F0FCFF;border:2px solid #4ECDC4;border-radius:24px;padding:8px 16px;margin-bottom:18px;font-size:14px;font-weight:900;color:#1B3A6B}
.login-input{width:100%;padding:14px 16px;font-size:16px;border:2px solid #DDD;border-radius:14px;margin-bottom:8px;font-family:inherit;font-weight:700;text-align:center;letter-spacing:2px}
.login-input:focus{outline:none;border-color:#4ECDC4}
.login-err{color:#C62828;font-size:12px;font-weight:900;min-height:18px;margin-bottom:10px}
.login-primary{display:block;width:100%;padding:14px;background:#58CC02;color:#FFF;border:none;border-radius:14px;font-size:15px;font-weight:900;cursor:pointer;letter-spacing:1px;margin-bottom:10px;box-shadow:0 4px 0 #4A8E00}
.login-primary:hover{background:#4FB502}
.login-divider{border:none;border-top:1px solid #EEE;margin:16px 0 12px}
.login-forgot{font-size:12px;color:#5A6B7E;font-weight:700;margin-bottom:8px}
.login-secondary{display:block;width:100%;padding:12px;background:transparent;color:#C62828;border:2px solid #C62828;border-radius:14px;font-size:13px;font-weight:900;cursor:pointer;letter-spacing:0.5px}
.login-secondary:hover{background:#FFEBEE}
.mod-btn.mod-D{color:var(--mod-d)}.mod-btn.mod-E{color:var(--mod-e)}.mod-btn.mod-F{color:var(--mod-f)}

.ch-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px;padding:12px 16px}
.ch-card{background:#FFF;border:2px solid var(--border);border-radius:16px;padding:12px;cursor:pointer;
  transition:all 0.15s;user-select:none;text-align:center;min-height:90px;display:flex;flex-direction:column;justify-content:center}
.ch-card:active{transform:scale(0.98)}
.ch-card.completed{border-color:var(--green);background:linear-gradient(180deg,#FFF,#F0FCE0)}
.ch-card.in-progress{border-color:var(--blue);box-shadow:0 4px 0 var(--blue-dark)}
.ch-card.locked{opacity:0.5;cursor:not-allowed;background:#F0F0F0}
.ch-num{font-size:11px;font-weight:900;color:var(--text-light);letter-spacing:0.5px}
.ch-num.mod-A{color:var(--mod-a)}.ch-num.mod-B{color:var(--mod-b)}.ch-num.mod-C{color:var(--mod-c)}
.ch-num.mod-D{color:var(--mod-d)}.ch-num.mod-E{color:var(--mod-e)}.ch-num.mod-F{color:var(--mod-f)}
.ch-title{font-size:13px;font-weight:900;margin:4px 0 6px;line-height:1.2}
.ch-meta{font-size:10px;color:var(--text-light);font-weight:800}

.section-title{font-size:13px;font-weight:900;color:var(--text-light);text-transform:uppercase;letter-spacing:0.8px;padding:12px 16px 4px}

.header-back{display:flex;align-items:center;padding:12px 16px;background:#FFF;border-bottom:2px solid var(--border);gap:12px}
.back-btn{background:none;border:none;font-size:24px;color:var(--text-light);cursor:pointer;font-family:inherit}
.header-title{font-size:16px;font-weight:900;flex:1}

.mini-progress{flex:1;height:14px;background:var(--bg-soft);border-radius:7px;overflow:hidden}
.mini-progress-fill{height:100%;background:var(--green);transition:width 0.4s;border-radius:7px}
.mini-progress-text{font-size:12px;font-weight:800;color:var(--text-light);min-width:50px;text-align:right}

.flashcard{background:#FFF;border:2px solid var(--border);border-radius:24px;margin:16px;padding:24px 20px;min-height:480px;display:flex;flex-direction:column}
.fc-pos-tag{display:inline-block;background:var(--purple);color:#FFF;padding:4px 12px;border-radius:12px;font-size:12px;font-weight:900;margin-bottom:8px}
.fc-word{font-size:40px;font-weight:900;margin:8px 0 6px;line-height:1.1}
.fc-pron{font-size:16px;color:var(--text-light);font-weight:700;margin-bottom:6px;font-family:Georgia,serif;font-style:italic}
.fc-def{font-size:16px;font-weight:800;margin:12px 0;padding:12px;background:#F0FCE0;border-radius:12px;border-left:4px solid var(--green);line-height:1.5}
.fc-row{margin:12px 0;padding:12px;background:var(--bg-light);border-radius:12px}
.fc-row-label{font-size:11px;color:var(--text-light);font-weight:900;text-transform:uppercase;letter-spacing:0.5px;margin-bottom:6px;display:flex;align-items:center;gap:4px}
.fc-row-content{font-size:14px;font-weight:700;line-height:1.5}
.fc-syn{color:var(--green-dark)}.fc-ant{color:var(--red-dark)}
.fc-example{font-style:italic;font-size:15px;font-weight:700}
.fc-actions{display:flex;gap:12px;margin-top:auto;padding-top:16px}

.quiz-card{background:#FFF;border:2px solid var(--border);border-radius:24px;margin:16px;padding:20px;min-height:480px;display:flex;flex-direction:column}
.quiz-q-num{font-size:13px;color:var(--text-light);font-weight:800;margin-bottom:6px}
.quiz-prompt{font-size:16px;font-weight:700;line-height:1.6;margin:16px 0;padding:16px;background:var(--bg-light);border-radius:16px}
.quiz-prompt .blank{display:inline-block;min-width:80px;border-bottom:3px solid var(--text);text-align:center;font-weight:900}
.quiz-opt{display:block;width:100%;text-align:left;padding:16px;margin-bottom:10px;border:2px solid var(--border);border-radius:16px;background:#FFF;font-family:inherit;font-size:15px;font-weight:800;color:var(--text);cursor:pointer;transition:all 0.15s;box-shadow:0 4px 0 var(--border)}
.quiz-opt:active{transform:translateY(2px);box-shadow:0 2px 0 var(--border)}
.quiz-opt.correct{border-color:var(--green);background:#D7FFB8;box-shadow:0 4px 0 var(--green-darker)}
.quiz-opt.wrong{border-color:var(--red);background:#FFDFE0;box-shadow:0 4px 0 var(--red-dark)}
.feedback{margin-top:16px;padding:14px;border-radius:14px;font-size:14px;font-weight:800;line-height:1.5;display:none}
.feedback.show{display:block}
.feedback.ok{background:#D7FFB8;color:var(--green-darker);border:2px solid var(--green)}
.feedback.no{background:#FFDFE0;color:var(--red-dark);border:2px solid var(--red)}

.stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:16px}
.stat-card{background:var(--bg-light);border-radius:16px;padding:14px 8px;text-align:center}
.stat-emoji{font-size:32px;line-height:1}
.stat-val{font-size:24px;font-weight:900;margin-top:4px}
.stat-lbl{font-size:11px;color:var(--text-light);font-weight:800;margin-top:2px}

.bottom-nav{position:fixed;bottom:0;left:0;right:0;background:#FFF;border-top:2px solid var(--border);display:flex;justify-content:space-around;padding:8px 0 12px;max-width:520px;margin:0 auto}
.nav-item{flex:1;text-align:center;font-size:11px;color:var(--text-light);font-weight:800;cursor:pointer;padding:4px;border-radius:8px}
.nav-item.active{color:var(--green-dark)}
.nav-emoji{font-size:26px;line-height:1;display:block;margin-bottom:2px}

.celebrate{text-align:center;padding:40px 20px;background:linear-gradient(180deg,#FFF,#F0FCE0);margin:16px;border-radius:24px;border:2px solid var(--green)}
.celebrate-emoji{font-size:80px;margin-bottom:16px}
.celebrate-title{font-size:28px;font-weight:900;color:var(--green-dark);margin-bottom:8px}
.celebrate-sub{font-size:16px;color:var(--text-light);font-weight:700;margin-bottom:24px}
.celebrate-stat-val{font-size:28px;color:var(--orange);font-weight:900;display:block}

.tip-box{background:linear-gradient(135deg,#FFF8E0,#FFEBC0);border:2px solid var(--yellow);border-radius:16px;padding:14px;margin:12px 16px;font-size:13px;font-weight:700;color:#8B6914;line-height:1.5}
.tip-title{font-size:14px;font-weight:900;margin-bottom:4px;color:#6B4F0A}

@keyframes pop{0%{transform:scale(0.8);opacity:0}60%{transform:scale(1.05)}100%{transform:scale(1);opacity:1}}
.pop{animation:pop 0.3s ease}
.view{display:none;animation:pop 0.25s ease}
.view.active{display:block}
.quiz-explain{margin-top:10px;padding-top:10px;border-top:1px dashed rgba(0,0,0,0.18);font-weight:600;font-size:12.5px;line-height:1.55;color:#3A3A3A;text-align:left}
.quiz-explain>div{margin-bottom:6px}.quiz-explain>div:last-child{margin-bottom:0}
.quiz-explain b{font-weight:900;color:#1B3A6B}
.qx-hook b{color:#6B4F0A}