@import "https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap";
:root{--bg:#0f0f1a;--bg-card:#ffffff0f;--bg-card-hover:#ffffff1a;--bg-input:#ffffff14;--text:#f0f0f5;--text-secondary:#9a9ab0;--accent:#7c5cfc;--accent-glow:#7c5cfc59;--pink:#ff6bb3;--pink-glow:#ff6bb34d;--cyan:#00d4ff;--cyan-glow:#00d4ff40;--green:#34d399;--green-glow:#34d39940;--orange:#fb923c;--orange-glow:#fb923c40;--danger:#f43f5e;--danger-glow:#f43f5e40;--line:#ffffff14;--radius:20px;--radius-sm:14px;--radius-pill:999px;--shadow:0 8px 32px #0000004d;--shadow-glow:0 0 40px var(--accent-glow)}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body{background:var(--bg);min-height:100dvh;color:var(--text);-webkit-font-smoothing:antialiased;margin:0;padding:0;font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;font-size:16px;overflow-x:hidden}body:before{content:"";pointer-events:none;z-index:0;background:radial-gradient(60% 50% at 20% 10%,#7c5cfc26,#0000),radial-gradient(50% 40% at 80% 20%,#ff6bb31a,#0000),radial-gradient(40% 30% at 50% 80%,#00d4ff14,#0000);position:fixed;inset:0}a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit;color:inherit}.shell{z-index:1;max-width:540px;margin:0 auto;padding:16px 16px 100px;position:relative}.hero{border-radius:var(--radius);border:1px solid var(--line);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);background:linear-gradient(135deg,#7c5cfc1f,#ff6bb314);gap:16px;padding:24px 20px;animation:.4s ease-out fadeUp;display:grid}.hero h1{letter-spacing:-.03em;background:linear-gradient(135deg, #fff 30%, var(--pink));-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin:0;font-size:2rem;font-weight:900;line-height:1.1}.hero p{margin:0}.hero-layout{gap:20px;display:grid}.hero-image{border-radius:16px;margin-top:8px;position:relative;overflow:hidden}.hero-illustration{border-radius:16px;width:100%;height:auto;display:block;-webkit-mask-image:linear-gradient(#000 70%,#0000 100%);mask-image:linear-gradient(#000 70%,#0000 100%)}.hero-copy{gap:12px;display:grid}.hero-note{border-radius:var(--radius-pill);width:fit-content;color:var(--pink);background:#ff6bb326;padding:6px 12px;font-size:.8rem;font-weight:700;display:inline-flex}.hero-stats,.feature-grid{gap:10px;display:grid}.stat-card{border-radius:var(--radius-sm);background:var(--bg-card);border:1px solid var(--line);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);padding:16px;transition:transform .2s,background .2s}.stat-card:active{transform:scale(.97)}.stat-card h3{text-transform:uppercase;letter-spacing:.06em;color:var(--text-secondary);margin:0 0 4px;font-size:.8rem;font-weight:700}.stat-card strong{background:linear-gradient(135deg, var(--cyan), var(--accent));-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;font-size:1.8rem;font-weight:900;display:block}.stat-card p{color:var(--text-secondary);margin:6px 0 0;font-size:.8rem;line-height:1.4}.feature-card{border-radius:var(--radius-sm);border:1px solid var(--line);background:var(--bg-card);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);padding:18px;transition:transform .2s}.feature-card:active{transform:scale(.97)}.feature-card h3{margin:0 0 6px;font-size:1rem;font-weight:800}.feature-card p{color:var(--text-secondary);margin:0;font-size:.85rem;line-height:1.5}.feature-card.pink{background:linear-gradient(135deg,#ff6bb314,#0000);border-color:#ff6bb333}.feature-card.blue{background:linear-gradient(135deg,#7c5cfc14,#0000);border-color:#7c5cfc33}.feature-card.orange{background:linear-gradient(135deg,#fb923c14,#0000);border-color:#fb923c33}.section-kicker{letter-spacing:.08em;text-transform:uppercase;color:var(--accent);font-size:.8rem;font-weight:800}.hero-orbit{display:none}.panel-grid{gap:14px;margin-top:14px;display:grid}.panel{border-radius:var(--radius);background:var(--bg-card);border:1px solid var(--line);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);padding:20px;animation:.4s ease-out fadeUp}.panel.alt{color:var(--text);border-radius:var(--radius-sm);background:#7c5cfc0f;border-color:#7c5cfc26;padding:14px 16px;font-size:.9rem}.panel h2{margin:0;font-size:1.3rem;font-weight:800}.panel h3{margin:0;font-size:1.1rem;font-weight:700}.stack{gap:14px;display:grid}.toolbar,.row{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.field{gap:6px;display:grid}.field span{color:var(--text-secondary);font-size:.8rem;font-weight:600}.field input,.field textarea,.field select{border-radius:var(--radius-sm);border:1px solid var(--line);background:var(--bg-input);width:100%;color:var(--text);padding:14px 16px;font-size:1rem;transition:border-color .2s,box-shadow .2s}.field input:focus,.field textarea:focus,.field select:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow);outline:none}.password-field{width:100%;position:relative}.password-field input{padding-right:52px}.password-toggle{border-radius:var(--radius-pill);width:36px;height:36px;color:var(--accent);cursor:pointer;background:#7c5cfc26;border:0;place-items:center;display:inline-grid;position:absolute;top:50%;right:10px;transform:translateY(-50%)}.password-toggle svg{fill:none;stroke:currentColor;stroke-width:1.8px;stroke-linecap:round;stroke-linejoin:round;width:18px;height:18px}.btn{border-radius:var(--radius-pill);cursor:pointer;background:linear-gradient(135deg, var(--accent), var(--pink));color:#fff;box-shadow:0 4px 20px var(--accent-glow);border:0;justify-content:center;align-items:center;gap:8px;min-height:48px;padding:14px 24px;font-size:.95rem;font-weight:700;transition:transform .15s,box-shadow .15s,filter .15s;display:inline-flex}.btn:active{transform:scale(.96)}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.btn.secondary{background:var(--bg-card);border:1px solid var(--line);color:var(--text);box-shadow:none}.btn.secondary:active{background:var(--bg-card-hover)}.btn.danger{background:linear-gradient(135deg, var(--danger), #e11d48);box-shadow:0 4px 20px var(--danger-glow)}.badge{border-radius:var(--radius-pill);width:fit-content;color:var(--accent);letter-spacing:.06em;text-transform:uppercase;background:linear-gradient(135deg,#7c5cfc33,#ff6bb326);padding:6px 12px;font-size:.75rem;font-weight:800;display:inline-flex}.muted{color:var(--text-secondary);font-size:.85rem;line-height:1.5}.list{gap:10px;display:grid}.card{border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--bg-card);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);padding:16px;transition:transform .2s,border-color .2s,background .2s}.card:active{border-color:#7c5cfc4d;transform:scale(.98)}.tab-bar{-webkit-overflow-scrolling:touch;scrollbar-width:none;gap:6px;padding-bottom:4px;display:flex;overflow-x:auto}.tab-bar::-webkit-scrollbar{display:none}.tab-btn{white-space:nowrap;border:1px solid var(--line);border-radius:var(--radius-pill);background:var(--bg-card);color:var(--text-secondary);cursor:pointer;flex-shrink:0;padding:10px 16px;font-size:.8rem;font-weight:600;transition:all .2s}.tab-btn.active{background:linear-gradient(135deg, var(--accent), var(--pink));color:#fff;box-shadow:0 2px 12px var(--accent-glow);border-color:#0000;font-weight:700}.quiz-question{border-radius:var(--radius);border:1px solid var(--line);background:var(--bg-card);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);gap:10px;padding:18px;display:grid}.quiz-question strong{font-size:1rem;line-height:1.4}.choice-grid{gap:8px;display:grid}.choice-btn{border-radius:var(--radius-sm);border:1px solid var(--line);background:var(--bg-input);width:100%;color:var(--text);text-align:left;cursor:pointer;min-height:48px;padding:14px 16px;font-size:.95rem;transition:all .2s}.choice-btn.selected{border-color:var(--accent);color:#fff;box-shadow:0 0 0 2px var(--accent-glow);background:#7c5cfc26}.choice-btn:active{transform:scale(.97)}.review-card{gap:6px;display:grid}.review-wrong,.review-correct{margin:0;font-size:.9rem}.review-wrong{color:var(--danger)}.review-correct{color:var(--green);font-weight:700}.modal-backdrop{z-index:50;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#000000b3;place-items:center;padding:20px;display:grid;position:fixed;inset:0}.modal-card{border-radius:var(--radius);border:1px solid var(--line);width:min(400px,100%);box-shadow:0 20px 60px #00000080, var(--shadow-glow);text-align:center;background:linear-gradient(#1e1e32fa,#0f0f1afa);gap:14px;padding:28px 24px;display:grid}.modal-card-scrollable{text-align:left;grid-template-rows:auto auto minmax(0,1fr) auto;width:min(720px,100%);max-height:min(88dvh,960px)}.modal-scroll-content{min-height:0;padding-right:4px;overflow-y:auto}.modal-card h2{background:linear-gradient(135deg, var(--green), var(--cyan));-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin:0;font-size:1.5rem;font-weight:900}.modal-card p{margin:0}.analysis-modal-card{text-align:left;grid-template-rows:auto minmax(0,1fr) auto;gap:16px;width:min(880px,100%);max-height:min(88dvh,960px);padding:24px}.analysis-modal-title{font-size:1.2rem!important}.analysis-modal-content{min-height:0;padding-right:4px;overflow-y:auto}.upload-item-row{grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:10px;display:grid}.upload-action-row{gap:10px;display:grid}.upload-action-main,.upload-action-info{min-width:0}.pair-row{grid-template-columns:minmax(0,1fr) minmax(0,1fr) auto;gap:8px;display:grid}.pair-field{border-radius:var(--radius-sm);border:1px solid var(--line);background:var(--bg-input);width:100%;color:var(--text);resize:none;min-height:46px;padding:12px 14px;font-size:.9rem;overflow:hidden}.pair-field:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow);outline:none}.pair-field-long:hover,.pair-field-long:focus{min-height:92px}.pair-remove-btn{color:var(--danger);background:#f43f5e14;border-color:#f43f5e40}.pair-remove-btn:active{background:#f43f5e29}.set-details{padding:0;overflow:hidden}.set-summary{cursor:pointer;grid-template-columns:minmax(0,1fr);align-items:stretch;gap:10px;padding:16px;list-style:none;display:grid}.set-summary::-webkit-details-marker{display:none}.set-summary-main{gap:10px;min-width:0;display:grid}.set-title-row{grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:10px;display:grid}.set-card-title{min-width:0;line-height:1.35;display:block}.set-card-title-input{width:100%}.set-summary-actions{flex-wrap:nowrap;align-items:center;gap:10px;display:flex}.set-start-btn{white-space:nowrap;flex:none}.more-toggle{pointer-events:none;border:1px solid var(--line);width:32px;height:32px;color:var(--muted);background:var(--bg-card);border-radius:999px;flex:none;justify-content:center;align-items:center;display:inline-flex}.more-toggle svg{width:16px;height:16px}.set-title-input{border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--bg-input);width:100%;min-width:0;color:var(--text);padding:10px 12px}.set-title-input:focus{border-color:var(--accent);outline:none}.draft-card-header{gap:10px;display:grid}.draft-title-row{grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:10px;display:grid}.draft-title{min-width:0;line-height:1.35;display:block}.draft-title-input{width:100%}.draft-status-row{gap:8px;display:grid}.analysis-progress{border-radius:var(--radius-pill);border:1px solid var(--line);background:#ffffff0f;height:10px;position:relative;overflow:hidden}.analysis-progress-bar{border-radius:inherit;background:linear-gradient(90deg, var(--accent), var(--cyan));width:35%;box-shadow:0 0 18px var(--accent-glow);animation:1.2s ease-in-out infinite analysis-progress-slide;position:absolute;inset:0 auto 0 -35%}.draft-secondary-actions{align-items:center;gap:10px;display:flex}.set-details>.set-detail-meta{padding:0 16px 16px}.set-detail-meta{justify-self:end;align-items:start;gap:4px;width:fit-content;display:grid}.set-detail-meta p{margin:0}.set-detail-meta .toolbar{justify-content:flex-start;margin-top:6px}.icon-btn{border-radius:var(--radius-sm);border:1px solid var(--line);background:var(--bg-card);width:40px;height:40px;color:var(--accent);cursor:pointer;place-items:center;transition:background .2s;display:inline-grid}.icon-btn:active{background:var(--bg-card-hover)}.icon-btn svg{width:18px;height:18px}.profile-nickname-row{grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:10px;min-width:0;display:inline-grid}.profile-header-row{justify-content:space-between;align-items:flex-start}.profile-identity{gap:6px;display:grid}.profile-nickname-input{min-width:180px}.credit-card{background:linear-gradient(135deg,#7c5cfc24,#00d4ff14)}.credit-card-layout{grid-template-columns:auto 1fr;align-items:center;gap:14px;display:grid}.credit-chart{flex-shrink:0;width:84px;height:84px;position:relative}.credit-chart svg{width:100%;height:100%;transform:rotate(-90deg)}.credit-chart-track,.credit-chart-value{fill:none;stroke-width:8px}.credit-chart-track{stroke:#ffffff14}.credit-chart-value{stroke:var(--cyan);stroke-linecap:round}.credit-chart strong{color:var(--text);place-items:center;font-size:1rem;font-weight:900;display:grid;position:absolute;inset:0}.shared-score-row{border-radius:var(--radius-sm);background:var(--bg-card);border:1px solid var(--line);gap:4px;padding:12px 14px;display:grid}.chart-filter{min-width:140px}.chart-card{border-radius:var(--radius-sm);border:1px solid var(--line);background:var(--bg-card);gap:14px;padding:16px;display:grid}.chart-summary{justify-content:space-between}.login-chart{grid-template-columns:repeat(auto-fit,minmax(32px,1fr));align-items:end;gap:6px;min-height:180px;display:grid}.login-bar-wrap{appearance:none;color:inherit;cursor:pointer;font:inherit;background:0 0;border:0;justify-items:center;gap:4px;padding:0;display:grid}.login-bar-wrap:focus-visible .login-bar-track,.login-bar-wrap.active .login-bar-track{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-glow)}.login-bar-wrap.active .login-bar-count,.login-bar-wrap.active .login-bar-label{color:var(--text)}.login-bar-track{border-radius:var(--radius-sm);border:1px solid var(--line);background:#ffffff0a;align-items:end;width:100%;height:120px;padding:4px;display:flex}.login-bar{background:linear-gradient(180deg, var(--pink), var(--accent));width:100%;min-height:4px;box-shadow:0 0 12px var(--accent-glow);border-radius:10px}.login-bar-count{color:var(--accent);font-size:.8rem;font-weight:700}.login-bar-label{color:var(--text-secondary);font-size:.75rem}.admin-shell .hero{background:linear-gradient(135deg,#7c5cfc1a,#00d4ff0f)}pre{white-space:pre-wrap;word-break:break-word;color:var(--text-secondary);margin:0;font-size:.8rem}input[type=file]{border-radius:var(--radius-sm);width:100%;color:var(--text-secondary);cursor:pointer;background:#7c5cfc0d;border:2px dashed #7c5cfc4d;padding:14px;font-size:.9rem}input[type=file]:active{border-color:var(--accent);background:#7c5cfc1a}input[type=number],input[type=date]{border-radius:var(--radius-sm);border:1px solid var(--line);background:var(--bg-input);color:var(--text);padding:10px 14px;font-size:.9rem}input[type=number]:focus,input[type=date]:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow);outline:none}input[type=checkbox]{width:20px;height:20px;accent-color:var(--accent)}textarea{border-radius:var(--radius-sm);border:1px solid var(--line);background:var(--bg-input);width:100%;color:var(--text);resize:vertical;padding:12px 14px;font-size:.9rem}textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow);outline:none}input:not([type=file]):not([type=checkbox]):not([type=number]):not([type=date]){border-radius:var(--radius-sm);border:1px solid var(--line);background:var(--bg-input);width:100%;color:var(--text);padding:14px 16px;font-size:1rem}input:not([type=file]):not([type=checkbox]):not([type=number]):not([type=date]):focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow);outline:none}@keyframes fadeUp{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse-ring{0%{opacity:.6;transform:scale(.92)}70%{opacity:0;transform:scale(1.15)}to{opacity:0;transform:scale(1.2)}}@keyframes analysis-progress-slide{0%{transform:translate(0)}to{transform:translate(390%)}}.invite-form{border-radius:var(--radius);background:#7c5cfc0f;border:1px solid #7c5cfc26;gap:10px;margin-top:12px;padding:16px;display:grid}.invite-form textarea{border-radius:var(--radius);border:1px solid var(--line);background:var(--card);width:100%;min-height:80px;color:var(--text);resize:vertical;padding:12px;font-family:inherit;font-size:.95rem}.invite-form textarea:focus{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-glow);outline:none}.quiz-fullscreen{z-index:1000;background:var(--bg);flex-direction:column;animation:.3s ease-out fadeUp;display:flex;position:fixed;inset:0}.quiz-fullscreen-header{border-bottom:1px solid var(--line);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#0f0f1af2;flex-shrink:0;justify-content:space-between;align-items:center;gap:12px;padding:16px 20px;display:flex}.quiz-fullscreen-header h2{white-space:nowrap;text-overflow:ellipsis;margin:0;font-size:1.1rem;font-weight:800;overflow:hidden}.quiz-abort-btn{flex-shrink:0;color:#ef4444!important;background:#ef444426!important;border-color:#ef44444d!important;min-height:40px!important;padding:8px 16px!important;font-size:.85rem!important}.quiz-abort-btn:active{background:#ef44444d!important}.quiz-fullscreen-body{-webkit-overflow-scrolling:touch;flex:1;padding:20px;overflow-y:auto}.quiz-fullscreen-body .list{max-width:600px;margin:0 auto}.quiz-fullscreen-footer{border-top:1px solid var(--line);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#0f0f1af2;flex-shrink:0;justify-content:center;padding:16px 20px;display:flex}.quiz-fullscreen-footer .btn{width:100%;max-width:400px}@media (min-width:768px){.shell{max-width:720px}.hero h1{font-size:2.6rem}.panel-grid{grid-template-columns:1fr 1fr}.hero-stats,.feature-grid{grid-template-columns:repeat(3,1fr)}.hero-layout{grid-template-columns:1.2fr .8fr;align-items:end}.upload-action-row{grid-template-columns:minmax(200px,300px) 1fr}.draft-title-input{max-width:42rem}}.language-switcher{justify-content:flex-end;gap:.25rem;padding:.5rem 0;display:flex}.lang-btn{border:1.5px solid var(--line);color:var(--text-secondary);cursor:pointer;letter-spacing:.03em;background:0 0;border-radius:6px;padding:.25rem .55rem;font-size:.78rem;font-weight:600;transition:background .15s,color .15s,border-color .15s}.lang-btn:hover{background:var(--bg-card-hover);color:var(--text)}.lang-btn.active{background:var(--accent);color:#fff;border-color:var(--accent)}.lang-pair-modal{width:90vw;max-width:380px}.lang-pair-fields{align-items:flex-end;gap:.5rem;margin:1rem 0;display:flex}.lang-pair-fields label{flex:1}.lang-pair-fields select{border-radius:var(--radius-sm);border:1.5px solid var(--line);background:var(--bg-input);width:100%;color:var(--text);appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%239a9ab0' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");background-position:right .6rem center;background-repeat:no-repeat;padding:.6rem 2rem .6rem .75rem;font-family:inherit;font-size:.95rem}.lang-swap-btn{flex-shrink:0;margin-bottom:.15rem}.danger-text{color:var(--danger);margin:0 0 .5rem;font-size:.85rem}.testimonials-section{margin-top:2.5rem;padding:0 0 2rem}.testimonials-heading{text-align:center;background:linear-gradient(135deg, var(--text) 0%, var(--pink) 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin-bottom:1.5rem;font-size:1.5rem;font-weight:800}.testimonials-grid{gap:1rem;display:grid}.testimonial-card{border-radius:var(--radius);background:var(--bg-card);border:1px solid var(--line);gap:.85rem;padding:1.25rem;transition:transform .2s,box-shadow .2s;display:flex}.testimonial-card:hover{box-shadow:var(--shadow);transform:translateY(-2px)}.testimonial-avatar{color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:44px;height:44px;font-size:1.1rem;font-weight:700;display:flex}.testimonial-card:first-child .testimonial-avatar{background:linear-gradient(135deg, var(--accent), var(--pink))}.testimonial-card:nth-child(2) .testimonial-avatar{background:linear-gradient(135deg, var(--cyan), var(--accent))}.testimonial-card:nth-child(3) .testimonial-avatar{background:linear-gradient(135deg, var(--orange), var(--pink))}.testimonial-body{flex:1;min-width:0}.testimonial-text{color:var(--text);border-left:3px solid var(--accent);margin:0 0 .65rem;padding-left:1rem;font-size:.92rem;font-style:italic;line-height:1.55;position:relative}.testimonial-author{flex-direction:column;gap:.1rem;display:flex}.testimonial-author strong{font-size:.88rem}.testimonial-author .muted{font-size:.78rem}@media (min-width:700px){.testimonials-grid{grid-template-columns:repeat(3,1fr)}.testimonial-card{text-align:center;flex-direction:column;align-items:center}.testimonial-text{border-left:none;border-top:3px solid var(--accent);padding-top:.75rem;padding-left:0}.testimonial-author{align-items:center}}