:root{--transition: background .25s, color .25s, border-color .25s, box-shadow .25s}@media (prefers-color-scheme: light){:root:not([data-theme=dark]){--bg:#f4f5f8;--bg2:#eaecf2;--surface:#ffffff;--border:#d8dce8;--border2:#bcc2d8;--ink:#1a1d2e;--ink2:#4a5070;--ink3:#8890b0;--primary:#4f5fd5;--primary-text:#ffffff;--primary-dim:#eef0ff;--primary-border:#8890e0;--ok:#1a8a50;--ok-bg:#e8f8ef;--ok-border:#5ac888;--err:#c03030;--err-bg:#fce8e8;--err-border:#e08080;--blue:#2070c0;--blue-bg:#e8f0fc;--blue-border:#80b0e8;--shadow:0 2px 12px rgba(0,0,0,.1);--shadow-lg:0 8px 36px rgba(0,0,0,.15);--login-bg-from:#e8ecf8;--login-bg-to:#f4f5f8}}[data-theme=dark]{--bg: #111318;--bg2: #181c26;--surface: #1e2232;--border: #2d3348;--border2: #3d4560;--ink: #e8eaf4;--ink2: #9098b8;--ink3: #5a6280;--primary: #6c7dff;--primary-text: #ffffff;--primary-dim: #12143a;--primary-border:#3a3d8a;--ok: #34c47a;--ok-bg: #091a12;--ok-border:#1a5435;--err: #e05555;--err-bg: #1a0808;--err-border:#6a2020;--warn: #e8a820;--warn-bg: #1a1200;--warn-border:#7a5800;--blue: #5aabf0;--blue-bg: #071524;--blue-border:#1a3d5a;--shadow: 0 2px 12px rgba(0,0,0,.45);--shadow-lg:0 8px 36px rgba(0,0,0,.6);--login-bg-from:#0a0d18;--login-bg-to: #111318}[data-theme=light]{--bg: #f4f5f8;--bg2: #eaecf2;--surface: #ffffff;--border: #d8dce8;--border2: #bcc2d8;--ink: #1a1d2e;--ink2: #4a5070;--ink3: #8890b0;--primary: #4f5fd5;--primary-text: #ffffff;--primary-dim: #eef0ff;--primary-border:#8890e0;--ok: #1a8a50;--ok-bg: #e8f8ef;--ok-border:#5ac888;--err: #c03030;--err-bg: #fce8e8;--err-border:#e08080;--warn: #9a6800;--warn-bg: #fef8e0;--warn-border:#d4a020;--blue: #2070c0;--blue-bg: #e8f0fc;--blue-border:#80b0e8;--shadow: 0 2px 12px rgba(0,0,0,.1);--shadow-lg:0 8px 36px rgba(0,0,0,.15);--login-bg-from:#e8ecf8;--login-bg-to: #f4f5f8}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{transition:var(--transition);width:100%;overflow-x:hidden}body{background:var(--bg);color:var(--ink);font-family:Lexend,sans-serif;min-height:100vh;font-size:15px;-webkit-font-smoothing:antialiased;transition:var(--transition);padding-bottom:110px;width:100%;overflow-x:hidden}.view{display:none!important}#loginView.active{display:flex!important;align-items:center;justify-content:center;min-height:100vh;padding:20px;background:linear-gradient(135deg,var(--login-bg-from,#0a0d18) 0%,var(--login-bg-to,#111318) 100%);transition:background .3s;width:100%;overflow-x:hidden}#appView.active{display:flex!important;flex-direction:column;min-height:100vh;width:100%;overflow-x:hidden}.login-card{background:var(--surface);border:1.5px solid var(--border2);border-radius:20px;padding:36px 32px;width:100%;max-width:400px;box-shadow:var(--shadow-lg);transition:var(--transition)}.login-logo{font-family:Lexend 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var(--border);border-radius:10px;padding:12px 14px;color:var(--ink);font-family:Lexend,sans-serif;font-size:.9rem;outline:none;transition:border-color .18s}.form-input:focus{border-color:var(--primary)}.form-input::placeholder{color:var(--ink3)}.btn-submit{width:100%;padding:13px;border-radius:11px;border:none;background:var(--primary);color:var(--primary-text);font-family:Lexend,sans-serif;font-size:.9rem;font-weight:700;cursor:pointer;transition:all .18s;margin-top:4px;display:flex;align-items:center;justify-content:center;gap:8px}.btn-submit:hover{filter:brightness(1.1);transform:translateY(-1px);box-shadow:var(--shadow-lg)}.btn-submit:disabled{opacity:.5;cursor:not-allowed;transform:none}.login-or{display:flex;align-items:center;gap:10px;margin:16px 0;font-size:.75rem;color:var(--ink3)}.login-or:before,.login-or:after{content:"";flex:1;height:1px;background:var(--border)}.login-msg{padding:10px 14px;border-radius:9px;font-size:.82rem;font-weight:500;margin-bottom:14px;display:none}.login-msg.err{background:var(--err-bg);border:1.5px solid var(--err-border);color:var(--err);display:block}.login-msg.ok{background:var(--ok-bg);border:1.5px solid var(--ok-border);color:var(--ok);display:block}.login-divider{display:flex;align-items:center;gap:10px;margin:16px 0 12px;color:var(--ink3);font-size:.78rem}.login-divider:before,.login-divider:after{content:"";flex:1;height:1px;background:var(--border)}.btn-guest{width:100%;padding:11px;border-radius:10px;border:1.5px dashed var(--border2);background:transparent;color:var(--ink2);font-size:.88rem;font-family:inherit;cursor:pointer;transition:border-color .2s,color .2s,background .2s}.btn-guest:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-dim)}.login-features{display:flex;flex-direction:column;gap:7px;margin-top:22px;padding-top:18px;border-top:1px solid var(--border)}.login-feat{display:flex;align-items:center;gap:8px;font-size:.76rem;color:var(--ink3)}.spinner{width:16px;height:16px;border:2px solid rgba(0,0,0,.2);border-top-color:var(--primary-text);border-radius:50%;animation:spin .7s linear infinite;display:none}@keyframes spin{to{transform:rotate(360deg)}}#app-wrap{width:100%;max-width:480px;margin:0 auto;padding:16px;flex:1;display:flex;flex-direction:column;box-sizing:border-box;overflow-x:hidden}.topbar{display:flex;align-items:center;justify-content:space-between;flex-wrap:nowrap;padding:10px 0 18px}.app-logo{font-family:Lexend Deca,sans-serif;font-size:1.3rem;font-weight:800;letter-spacing:-.3px;white-space:nowrap;flex-shrink:0}.app-logo em{color:var(--primary);font-style:italic}.topbar-right{display:flex;align-items:center;gap:8px}.streak-pill{background:var(--primary-dim);border:1px solid var(--primary-border);border-radius:50px;padding:5px 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var(--border);border-radius:14px;padding:14px 10px;text-align:center;box-shadow:var(--shadow)}.stat-num{font-family:Lexend Deca,sans-serif;font-size:1.7rem;font-weight:800;line-height:1;margin-bottom:4px}.stat-lbl{font-size:.67rem;color:var(--ink3);text-transform:uppercase;letter-spacing:1px}.prog-wrap{margin-bottom:18px}.prog-meta{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:7px;font-size:.78rem}.prog-meta span{color:var(--ink3)}.prog-meta b{color:var(--ok);font-family:Lexend Deca,sans-serif}.prog-track{height:7px;background:var(--bg2);border-radius:99px;overflow:hidden;border:1px solid var(--border)}.prog-fill{height:100%;background:linear-gradient(90deg,var(--primary),#2ec4a0);border-radius:99px;transition:width .6s cubic-bezier(.4,0,.2,1)}.quick-row{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-bottom:22px}.q-btn{padding:12px 6px;border-radius:12px;border:1.5px solid var(--border2);background:var(--surface);font-family:Lexend,sans-serif;font-size:.78rem;font-weight:500;color:var(--ink);cursor:pointer;transition:all .18s;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;box-shadow:var(--shadow);touch-action:manipulation;-webkit-user-select:none;user-select:none}.q-btn:hover{border-color:var(--primary);transform:translateY(-1px);box-shadow:var(--shadow-lg)}.q-btn:active{transform:scale(.98)}.q-btn-ico{font-size:1.2rem}.q-btn:first-child{grid-column:span 2}.q-btn.primary{background:var(--primary);border-color:var(--primary);color:var(--primary-text);font-weight:700}.q-btn.primary:hover{filter:brightness(1.08);transform:translateY(-1px)}.sec-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}.sec-title{font-size:.7rem;text-transform:uppercase;letter-spacing:2px;color:var(--ink3)}.sec-list{display:flex;flex-direction:column;gap:7px}.sec-row{background:var(--surface);border:1.5px solid var(--border);border-radius:13px;padding:12px 14px;display:flex;align-items:center;gap:12px;cursor:pointer;transition:all .18s;box-shadow:var(--shadow)}.sec-row:hover{border-color:var(--primary);transform:translateY(-1px);box-shadow:var(--shadow-lg)}.sec-dot{width:32px;height:32px;border-radius:50%;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-family:Lexend Deca,sans-serif;font-weight:800;font-size:.8rem;color:#fff}.sec-info{flex:1;min-width:0}.sec-name{font-size:.83rem;font-weight:600;color:var(--ink);margin-bottom:5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sec-bar{height:4px;background:var(--bg2);border-radius:99px;overflow:hidden}.sec-bar-fill{height:100%;border-radius:99px;transition:width .5s}.sec-ct{font-size:.73rem;color:var(--ink3);flex-shrink:0;font-variant-numeric:tabular-nums}.screen{display:none}.screen.active{display:block;animation:fadeUp .22s 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var(--border)}.mode-tab{flex:1;text-align:center;padding:8px 4px;border-radius:9px;font-size:.73rem;font-family:Lexend,sans-serif;font-weight:500;cursor:pointer;transition:all .18s;color:var(--ink2);border:1px solid transparent;background:transparent}.mode-tab span{display:block;font-size:.95rem;margin-bottom:2px}.mode-tab.active{background:var(--surface);color:var(--ink);font-weight:600;border-color:var(--border2);box-shadow:var(--shadow)}.mode-tab:hover:not(.active){color:var(--ink)}.sess-info{background:var(--primary-dim);border:1px solid var(--primary-border);border-radius:9px;padding:8px 14px;margin-bottom:14px;font-size:.78rem;color:var(--primary);display:flex;align-items:center;gap:7px}.card-wrap{perspective:1200px;height:290px;margin-bottom:14px;cursor:pointer;user-select:none;touch-action:pan-y;-webkit-user-select:none;-webkit-touch-callout:none}.card-wrap:active{opacity:.95}.card-inner{width:100%;height:100%;transform-style:preserve-3d;transition:transform .48s cubic-bezier(.4,0,.2,1);position:relative}.card-inner.flipped{transform:rotateY(180deg)}.card-face{position:absolute;top:0;right:0;bottom:0;left:0;background:var(--surface);border:1.5px solid var(--border);border-radius:18px;backface-visibility:hidden;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:26px;overflow:hidden;box-shadow:var(--shadow-lg)}.card-back{transform:rotateY(180deg)}.card-face:after{content:"";position:absolute;top:-50px;right:-50px;width:160px;height:160px;border-radius:50%;background:var(--c,var(--primary));opacity:.07;pointer-events:none}.card-tag{position:absolute;top:12px;right:12px;background:var(--bg2);border:1px solid var(--border);border-radius:50px;padding:3px 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24px;text-align:center;margin-bottom:14px;box-shadow:var(--shadow-lg);position:relative;overflow:hidden}.quiz-q:after{content:"";position:absolute;top:-60px;right:-60px;width:180px;height:180px;border-radius:50%;background:var(--c,var(--primary));opacity:.06;pointer-events:none}.quiz-lbl{font-size:.63rem;text-transform:uppercase;letter-spacing:2px;color:var(--ink3);margin-bottom:10px}.quiz-word{font-family:Lexend Deca,sans-serif;font-size:1.8rem;font-weight:800;color:var(--ink);line-height:1.2}.quiz-pron{font-size:.78rem;color:var(--ink2);font-style:italic;margin-top:7px}.quiz-opts{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:12px}.quiz-opt{background:var(--surface);border:1.5px solid var(--border2);border-radius:11px;padding:13px 8px;text-align:center;cursor:pointer;transition:all .18s;font-size:.83rem;font-family:Lexend,sans-serif;color:var(--ink);font-weight:500}.quiz-opt:hover:not(.disabled){border-color:var(--primary);color:var(--primary);transform:translateY(-1px)}.quiz-opt.correct{background:var(--ok-bg);border-color:var(--ok-border);color:var(--ok)}.quiz-opt.wrong{background:var(--err-bg);border-color:var(--err-border);color:var(--err)}.quiz-opt.disabled{cursor:default}.write-q{background:var(--surface);border:1.5px solid var(--border);border-radius:18px;padding:32px 24px;text-align:center;margin-bottom:12px;box-shadow:var(--shadow-lg);position:relative;overflow:hidden}.write-q:after{content:"";position:absolute;top:-60px;left:-60px;width:180px;height:180px;border-radius:50%;background:var(--primary);opacity:.05;pointer-events:none}.write-lbl{font-size:.63rem;text-transform:uppercase;letter-spacing:2px;color:var(--ink3);margin-bottom:10px}.write-sub{font-size:.73rem;color:var(--ink3);margin-top:7px}.write-input{width:100%;background:var(--surface);border:1.5px solid var(--border2);border-radius:11px;padding:13px 15px;color:var(--ink);font-family:Lexend,sans-serif;font-size:.95rem;outline:none;transition:all .18s;margin-bottom:9px}.write-input:focus{border-color:var(--primary)}.write-input::placeholder{color:var(--ink3)}.write-input.ok{border-color:var(--ok-border);background:var(--ok-bg)}.write-input.err{border-color:var(--err-border);background:var(--err-bg)}.write-input.warn{border-color:var(--warn-border);background:var(--warn-bg)}.write-fb{padding:10px 13px;border-radius:9px;font-size:.82rem;font-weight:500;margin-bottom:12px;display:none}.write-fb.ok{background:var(--ok-bg);border:1.5px solid var(--ok-border);color:var(--ok);display:block}.write-fb.err{background:var(--err-bg);border:1.5px solid var(--err-border);color:var(--err);display:block}.write-fb.warn{background:var(--warn-bg);border:1.5px solid var(--warn-border);color:var(--warn);display:block}.btn{padding:12px 18px;border-radius:11px;border:1.5px solid;font-family:Lexend,sans-serif;font-size:.87rem;font-weight:600;cursor:pointer;transition:all 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