:root{--navy:#1a3a5c;--teal:#2e8b8b;--teal-dark:#236b6b;--gold:#c8860d;--gold-light:#e0a82e;--cream:#fbf6ec;--light:#eaf2f4;--ink:#1f2a33;--muted:#5d6b76;--line:#e2e0d6;--success:#2e9e5b;--danger:#d2462f;--radius:14px;--shadow:0 2px 12px #1a3a5c14;--shadow-lg:0 8px 30px #1a3a5c24}*{box-sizing:border-box;margin:0;padding:0}body{background:radial-gradient(circle at 12% 18%, #2e8b8b12, transparent 40%), radial-gradient(circle at 88% 8%, #c8860d14, transparent 38%), var(--cream);color:var(--ink);min-height:100vh;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.55}a{color:var(--teal-dark);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:1080px;margin:0 auto;padding:0 20px}.narrow{max-width:460px}.topbar{background:var(--navy);color:#fff;box-shadow:var(--shadow);z-index:50;padding:14px 0;position:sticky;top:0}.topbar .inner{justify-content:space-between;align-items:center;display:flex}.brand{letter-spacing:.3px;color:#fff;align-items:center;gap:10px;font-size:1.25rem;font-weight:800;display:flex}.brand .dot{background:var(--gold-light);border-radius:50%;width:12px;height:12px;display:inline-block}.topbar nav{align-items:center;gap:18px;display:flex}.topbar nav a{color:#d7e4ec;font-size:.95rem;font-weight:600}.topbar nav a:hover{color:#fff;text-decoration:none}.topbar .pill{background:#ffffff1f;border-radius:999px;align-items:center;gap:6px;padding:6px 12px;font-size:.85rem;display:flex}.streak{color:var(--gold-light);font-weight:800}.btn{cursor:pointer;border-radius:var(--radius);border:none;justify-content:center;align-items:center;gap:8px;padding:11px 20px;font-family:inherit;font-size:.98rem;font-weight:700;transition:all .15s;display:inline-flex}.btn-primary{background:var(--teal);color:#fff}.btn-primary:hover{background:var(--teal-dark)}.btn-gold{background:var(--gold);color:#fff}.btn-gold:hover{background:#b3770b}.btn-ghost{color:var(--teal-dark);border:1.5px solid var(--teal);background:0 0}.btn-ghost:hover{background:var(--light)}.btn:disabled{opacity:.45;cursor:not-allowed}.btn-block{width:100%}.btn-sm{padding:7px 14px;font-size:.88rem}.card{border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--line);background:#fff;padding:22px}.card-pad-lg{padding:32px}.auth-wrap{justify-content:center;align-items:center;min-height:100vh;padding:24px;display:flex}.auth-card{width:100%;max-width:440px}.auth-title{color:var(--navy);margin-bottom:4px;font-size:1.7rem;font-weight:800}.auth-sub{color:var(--muted);margin-bottom:22px}.field{margin-bottom:16px}.field label{color:var(--ink);margin-bottom:6px;font-size:.9rem;font-weight:600;display:block}.field input,.field select{border:1.5px solid var(--line);background:#fff;border-radius:10px;width:100%;padding:11px 13px;font-family:inherit;font-size:1rem;transition:border .15s}.field input:focus,.field select:focus{border-color:var(--teal);outline:none}.error-box{color:var(--danger);background:#fdecea;border-radius:10px;margin-bottom:16px;padding:10px 14px;font-size:.9rem}.switch-link{text-align:center;color:var(--muted);margin-top:18px;font-size:.92rem}.page{padding:28px 0 60px}.page-head{margin-bottom:24px}.page-head h1{color:var(--navy);font-size:1.8rem;font-weight:800}.page-head p{color:var(--muted);margin-top:4px}.stats{grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px;margin-bottom:28px;display:grid}.stat{border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--shadow);background:#fff;padding:18px}.stat .num{color:var(--teal-dark);font-size:1.7rem;font-weight:800}.stat .lbl{color:var(--muted);text-transform:uppercase;letter-spacing:.5px;font-size:.85rem;font-weight:600}.progress-bar{background:var(--light);border-radius:999px;height:10px;margin-top:10px;overflow:hidden}.progress-bar>span{background:linear-gradient(90deg, var(--teal), var(--gold));border-radius:999px;height:100%;transition:width .4s;display:block}.week-group{margin-bottom:30px}.week-label{align-items:center;gap:12px;margin-bottom:14px;display:flex}.week-label h2{color:var(--gold);text-transform:uppercase;letter-spacing:1px;font-size:1.1rem;font-weight:800}.week-label .line{background:var(--line);flex:1;height:2px}.lesson-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px;display:grid}.lesson-card{border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--shadow);cursor:pointer;background:#fff;flex-direction:column;min-height:150px;padding:18px;transition:transform .15s,box-shadow .15s;display:flex;position:relative}.lesson-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-3px)}.lesson-card.locked{opacity:.6;cursor:not-allowed;background:#f6f4ee}.lesson-card.locked:hover{box-shadow:var(--shadow);transform:none}.lesson-card .day{color:var(--teal);text-transform:uppercase;letter-spacing:1px;font-size:.78rem;font-weight:700}.lesson-card h3{color:var(--navy);margin:4px 0;font-size:1.08rem}.lesson-card .sub{color:var(--muted);flex:1;font-size:.88rem}.lesson-card .foot{justify-content:space-between;align-items:center;margin-top:12px;font-size:.82rem;display:flex}.badge{border-radius:999px;padding:3px 9px;font-size:.75rem;font-weight:700}.badge-done{color:var(--success);background:#e3f5ea}.badge-progress{color:var(--gold);background:#fdf1d8}.badge-lock{color:var(--muted);background:#ececec}.theme-tag{color:var(--muted);font-weight:600}.lesson-head{flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:22px;display:flex}.lesson-head .day-num{color:var(--teal);text-transform:uppercase;letter-spacing:1px;font-size:.85rem;font-weight:700}.lesson-head h1{color:var(--navy);font-size:1.9rem}.lesson-head .subtitle{color:var(--muted);font-size:1.05rem}.block{margin-bottom:20px}.block h2{color:var(--teal-dark);border-bottom:2px solid var(--gold);margin-bottom:8px;padding-bottom:4px;font-size:1.25rem;display:inline-block}.block p{color:var(--ink);margin-bottom:6px}.callout{background:var(--cream);border-left:5px solid var(--gold);border-radius:8px;padding:14px 18px}.callout .ctitle{color:var(--gold);margin-bottom:6px;font-weight:800}.callout p{color:#44505a;margin-bottom:4px}.speak-btn{cursor:pointer;border:1.5px solid var(--teal);background:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;line-height:1;transition:all .12s;display:inline-flex}.speak-btn:hover{transform:scale(1.08)}.speak-btn:active{transform:scale(.92)}.speak-btn-md{width:40px;height:40px;font-size:1.1rem}.speak-btn-sm{border-width:1px;width:26px;height:26px;font-size:.78rem}.speak-btn-light:hover{background:var(--light)}.speak-btn-onDark{background:#ffffff38;border-color:#ffffffbf}.speak-btn-onDark:hover{background:#ffffff61}.sb-progress{align-items:center;gap:7px;margin-bottom:16px;display:flex}.sb-dot{background:var(--line);border-radius:50%;width:9px;height:9px;transition:background 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.15s}.sb-tile:hover{box-shadow:var(--shadow-lg);transform:translateY(-1px)}.sb-tile:active{cursor:grabbing}.sb-tile.dragging{opacity:.4}.sb-tile.over{border-color:var(--gold);border-style:dashed}.sb-tile.correct{background:var(--success);border-color:var(--success);color:#fff;animation:.45s both sb-pop}.sb-actions{flex-wrap:wrap;align-items:center;gap:12px;margin-top:16px;display:flex}.sb-msg{font-weight:800}.sb-msg-wrong{color:var(--danger)}.sb-msg-correct{color:var(--success)}.sb-done{text-align:center;padding:18px 8px}.sb-done-emoji{font-size:3rem;animation:.6s both sb-pop}.sb-done-title{color:var(--navy);margin-top:6px;font-size:1.4rem;font-weight:900}.sb-done-sub{color:var(--muted);margin:6px 0 18px}@keyframes sb-shake{0%,to{transform:translate(0)}15%{transform:translate(-9px)}30%{transform:translate(9px)}45%{transform:translate(-7px)}60%{transform:translate(7px)}75%{transform:translate(-4px)}}@keyframes sb-pop{0%{transform:scale(1)}45%{transform:scale(1.14)}to{transform:scale(1)}}.vb{border:1px solid var(--line);border-left:5px solid var(--teal);box-shadow:var(--shadow);background:#fff;border-radius:12px;padding:20px 22px}.vb-negative{border-left-color:var(--danger)}.vb-object{border-left-color:var(--success)}.vb-title{color:var(--navy);margin-bottom:6px;font-size:1.15rem;font-weight:800}.vb-intro{color:var(--muted);margin-bottom:18px;font-size:.95rem}.vb-step{margin-bottom:16px}.vb-step-label{color:var(--ink);align-items:center;gap:8px;margin-bottom:9px;font-size:.9rem;font-weight:700;display:flex}.vb-dot{border-radius:50%;width:11px;height:11px;display:inline-block}.vb-dot-sub{background:var(--teal)}.vb-dot-stem{background:var(--navy)}.vb-dot-mark{background:var(--gold)}.vb-dot-neg{background:var(--danger)}.vb-dot-obj{background:var(--success)}.vb-pills{flex-wrap:wrap;gap:8px;display:flex}.vb-pill{border:2px solid var(--line);cursor:pointer;background:#fff;border-radius:11px;flex-direction:column;align-items:center;gap:1px;min-width:64px;padding:8px 14px;font-family:inherit;transition:all .12s;display:flex}.vb-pill:hover{border-color:var(--teal);background:var(--light)}.vb-pill-sw{color:var(--navy);font-size:1rem;font-weight:800}.vb-pill-en{color:var(--muted);font-size:.74rem;font-weight:600}.vb-pill.active .vb-pill-sw,.vb-pill.active .vb-pill-en{color:#fff}.vb-pill.active.sub{border-color:var(--teal);background:var(--teal)}.vb-pill.active.stem{border-color:var(--navy);background:var(--navy)}.vb-pill.active.mark{border-color:var(--gold);background:var(--gold)}.vb-pill.active.neg{border-color:var(--danger);background:var(--danger)}.vb-pill.active.obj{border-color:var(--success);background:var(--success)}.vb-formula{flex-wrap:wrap;align-items:center;gap:8px;margin:20px 0 14px;display:flex}.vb-frag{align-items:center;gap:8px;display:inline-flex}.vb-piece{color:#fff;border-radius:10px;flex-direction:column;justify-content:center;align-items:center;min-width:64px;padding:8px 16px;display:flex}.vb-piece-tag{text-transform:uppercase;letter-spacing:.5px;opacity:.92;white-space:nowrap;font-size:.64rem;font-weight:700}.vb-piece-val{font-size:1.3rem;font-weight:800}.vb-sub{background:var(--teal)}.vb-mark{background:var(--gold)}.vb-stem{background:var(--navy)}.vb-neg{background:var(--danger)}.vb-obj{background:var(--success)}.vb-plus,.vb-eq{color:var(--muted);align-items:center;font-size:1.4rem;font-weight:800;display:flex}.vb-result{background:var(--light);text-align:center;border-radius:10px;padding:16px 18px}.vb-word-row{justify-content:center;align-items:center;gap:12px;display:flex}.vb-speak{border:1.5px solid var(--teal);cursor:pointer;background:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:40px;height:40px;font-size:1.1rem;line-height:1;transition:all .12s;display:inline-flex}.vb-speak:hover{background:var(--teal);transform:scale(1.06)}.vb-speak:active{transform:scale(.94)}.vb-word{letter-spacing:.5px;font-size:2rem;font-weight:900}.vb-t-sub{color:var(--teal-dark)}.vb-t-mark{color:var(--gold)}.vb-t-stem{color:var(--navy)}.vb-t-neg{color:var(--danger)}.vb-t-obj{color:var(--success)}.vb-en{color:var(--ink);margin-top:6px;font-weight:700}.vb-en-alt{color:var(--muted);font-size:.9rem;font-weight:500}.vb-q-sentence{font-size:1.45rem;font-weight:800}.vb-ns-badge{background:var(--navy);color:#fff;letter-spacing:.4px;border-radius:999px;margin-bottom:12px;padding:4px 13px;font-size:.76rem;font-weight:800;display:inline-block}.vb-arrow{color:var(--muted);margin:0 8px;font-weight:700}.vb-ns-verb{color:var(--ink);margin-top:12px;font-size:1.05rem;font-weight:700}.vb-qtip{color:var(--muted);margin-top:10px;font-size:.9rem}.vb-qtip strong{color:var(--gold)}.vb-question{border-left-color:var(--gold)}@media (width<=640px){.vb-word{font-size:1.6rem}.vb-piece{min-width:56px;padding:6px 11px}.vb-piece-val{font-size:1.15rem}}.swtable{border-collapse:collapse;width:100%;box-shadow:var(--shadow);border-radius:8px;overflow:hidden}.swtable th{background:var(--teal);color:#fff;text-align:left;padding:9px 13px;font-size:.9rem}.swtable td{border-bottom:1px solid var(--line);padding:9px 13px;font-size:.95rem}.swtable td:first-child{color:var(--navy);font-weight:700}.swtable tr:nth-child(2n) td{background:var(--light)}.dialogue-line{border:1px solid var(--line);background:#fff;border-radius:10px;margin-bottom:8px;padding:10px 14px}.dialogue-line .sp{color:var(--teal-dark);font-weight:800}.dialogue-line .sw{font-weight:600}.dialogue-line .en{color:var(--muted);font-size:.9rem;font-style:italic}ul.sw-list{padding-left:22px}ul.sw-list li{margin-bottom:5px}.vocab-grid{grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:10px;display:grid}.vocab-chip{border:1px solid var(--line);box-shadow:var(--shadow);background:#fff;border-radius:10px;padding:10px 13px}.vocab-sw-row{justify-content:space-between;align-items:center;gap:8px;display:flex}.vocab-chip .sw{color:var(--navy);font-weight:800}.vocab-chip .en{color:var(--muted);font-size:.88rem}.quiz-progress{color:var(--muted);margin-bottom:8px;font-weight:600}.question-card{border-radius:var(--radius);box-shadow:var(--shadow-lg);border:1px solid var(--line);background:#fff;padding:26px}.question-prompt{color:var(--navy);margin-bottom:20px;font-size:1.25rem;font-weight:700}.option{text-align:left;border:2px solid var(--line);cursor:pointer;background:#fff;border-radius:12px;width:100%;margin-bottom:10px;padding:14px 18px;font-family:inherit;font-size:1rem;transition:all .12s}.option:hover{border-color:var(--teal);background:var(--light)}.option.selected{border-color:var(--teal);background:#e3f1f1}.option.correct{border-color:var(--success);background:#e3f5ea}.option.wrong{border-color:var(--danger);background:#fdecea}.text-answer{border:2px solid var(--line);border-radius:12px;width:100%;padding:14px 16px;font-family:inherit;font-size:1.05rem}.text-answer:focus{border-color:var(--teal);outline:none}.hint{color:var(--gold);cursor:pointer;margin-top:10px;font-size:.88rem;font-weight:600}.feedback-correct{color:var(--success);margin-top:12px;font-weight:700}.feedback-wrong{color:var(--danger);margin-top:12px;font-weight:700}.result-card{text-align:center;padding:40px 30px}.result-score{color:var(--teal-dark);font-size:3rem;font-weight:900}.result-pass{color:var(--success);font-size:1.3rem;font-weight:800}.result-fail{color:var(--danger);font-size:1.3rem;font-weight:800}.xp-pop{background:var(--gold);color:#fff;border-radius:999px;margin-top:12px;padding:6px 16px;font-weight:800;display:inline-block}.flashcard{perspective:1200px;cursor:pointer;width:100%;max-width:420px;height:240px;margin:0 auto 20px}.flashcard-inner{width:100%;height:100%;transform-style:preserve-3d;transition:transform .5s;position:relative}.flashcard.flipped .flashcard-inner{transform:rotateY(180deg)}.flashcard-face{backface-visibility:hidden;border-radius:var(--radius);width:100%;height:100%;box-shadow:var(--shadow-lg);text-align:center;flex-direction:column;justify-content:center;align-items:center;padding:20px;display:flex;position:absolute}.flashcard-front{background:linear-gradient(135deg, var(--teal), var(--teal-dark));color:#fff}.flashcard-back{background:linear-gradient(135deg, var(--gold), var(--gold-light));color:#fff;transform:rotateY(180deg)}.flashcard-face .big{font-size:2rem;font-weight:800}.flashcard-face .tiny{opacity:.85;margin-top:8px;font-size:.85rem}.flashcard-speak{position:absolute;top:12px;right:12px}.row{align-items:center;gap:12px;display:flex}.spread{justify-content:space-between}.center{justify-content:center}.mt{margin-top:18px}.mb{margin-bottom:18px}.muted{color:var(--muted)}.spinner{border:4px solid var(--light);border-top-color:var(--teal);border-radius:50%;width:38px;height:38px;margin:60px auto;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.pace-options{grid-template-columns:repeat(auto-fit,minmax(110px,1fr));gap:10px;display:grid}.pace-opt{border:2px solid var(--line);text-align:center;cursor:pointer;background:#fff;border-radius:12px;padding:14px;transition:all .12s}.pace-opt:hover{border-color:var(--teal)}.pace-opt.active{border-color:var(--teal);background:#e3f1f1}.pace-opt .n{color:var(--navy);font-size:1.4rem;font-weight:800}.pace-opt .d{color:var(--muted);font-size:.82rem}@media (width<=640px){.topbar nav{gap:12px}.topbar nav a span.hide-sm{display:none}.lesson-grid{grid-template-columns:1fr}}.lp{color:var(--ink)}.lp-header{z-index:60;-webkit-backdrop-filter:saturate(180%)blur(10px);backdrop-filter:saturate(180%)blur(10px);border-bottom:1px solid var(--line);background:#fbf6ecd9;position:sticky;top:0}.lp-header-inner{justify-content:space-between;align-items:center;height:68px;display:flex}.lp-brand{align-items:center;display:inline-flex}.lp-brand:hover{text-decoration:none}.lp-nav{gap:26px;display:flex}.lp-nav a{color:var(--ink);font-size:.95rem;font-weight:600}.lp-nav a:hover{color:var(--teal-dark);text-decoration:none}.lp-header-cta{align-items:center;gap:10px;display:flex}.lp-hero{padding:70px 0 60px;overflow:hidden}.lp-hero-inner{grid-template-columns:1.15fr .85fr;align-items:center;gap:40px;display:grid}.lp-eyebrow{background:var(--light);color:var(--teal-dark);border-radius:999px;margin-bottom:18px;padding:6px 14px;font-size:.85rem;font-weight:700;display:inline-block}.lp-hero-copy h1{color:var(--navy);letter-spacing:-1px;font-size:3.4rem;font-weight:900;line-height:1.08}.lp-hero-copy h1 .accent{color:var(--gold)}.lp-lead{color:var(--muted);max-width:540px;margin:20px 0 28px;font-size:1.18rem}.lp-lead em{color:var(--teal-dark);font-style:italic}.lp-hero-actions{flex-wrap:wrap;gap:14px;display:flex}.lp-hero-actions .btn{padding:14px 26px;font-size:1.05rem}.lp-trust{color:var(--muted);margin-top:18px;font-size:.9rem}.lp-hero-art{justify-content:center;display:flex}.lp-hero-badge{background:radial-gradient(circle at 50% 40%, #fff 0%, var(--light) 70%, var(--cream) 100%);border:1px solid 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