@import "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap";
:root{--primary:#6366f1;--primary-light:#818cf8;--primary-dark:#4f46e5;--accent:#f59e0b;--accent-light:#fbbf24;--bg-primary:#0f0f1a;--bg-secondary:#1a1a2e;--bg-card:#1e1e32cc;--bg-card-hover:#282841e6;--bg-glass:#ffffff0d;--text-primary:#f1f5f9;--text-secondary:#94a3b8;--text-muted:#64748b;--success:#10b981;--warning:#f59e0b;--danger:#ef4444;--info:#3b82f6;--border:#ffffff14;--shadow:0 8px 32px #0000004d;--shadow-glow:0 0 40px #6366f126;--radius:16px;--radius-sm:10px;--radius-lg:24px}*{box-sizing:border-box;margin:0;padding:0}html,body{background:var(--bg-primary);height:100%;color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif}body:before{content:"";pointer-events:none;z-index:0;background:radial-gradient(at 20% 20%,#6366f11f 0%,#0000 50%),radial-gradient(at 80% 80%,#f59e0b14 0%,#0000 50%),radial-gradient(#10b9810d 0%,#0000 60%);width:100%;height:100%;position:fixed;top:0;left:0}.app-container{z-index:1;max-width:1280px;min-height:100vh;margin:0 auto;padding:1.75rem 1.5rem 3rem;position:relative}.global-header{-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);background:#121220c2;border:1px solid #ffffff14;border-radius:22px;grid-template-columns:1fr auto 1fr;align-items:center;gap:1rem;margin-bottom:2.5rem;padding:1.1rem 1.25rem 1.35rem;display:grid;box-shadow:0 10px 35px #00000038}.global-header-spacer{min-height:1px}.global-header-left{flex-direction:column;grid-column:2;justify-content:center;align-items:center;gap:.9rem;min-width:0;display:flex}.global-title{text-align:center;letter-spacing:-.04em;background:linear-gradient(135deg,var(--primary-light),var(--accent));-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;justify-content:center;width:100%;font-size:2rem;font-weight:900;line-height:1.15;text-decoration:none;display:inline-flex}.global-nav{flex-wrap:wrap;justify-content:center;gap:.75rem;width:100%;display:flex}.auth-header{flex-wrap:wrap;grid-column:3;justify-content:flex-end;justify-self:end;align-items:center;gap:.9rem;max-width:100%;display:flex}.auth-loading{color:var(--text-secondary);font-size:.9rem}.auth-panel{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#ffffff0a;border:1px solid #ffffff14;border-radius:18px;align-items:center;padding:.55rem .7rem;display:flex}.auth-guest-panel{gap:.75rem}.auth-guest-text{color:var(--text-secondary);white-space:nowrap;font-size:.88rem}.auth-guest-btn{min-width:112px}.auth-logout-btn{min-width:96px}.auth-user-chip{background:#ffffff0d;border:1px solid #ffffff14;border-radius:999px;align-items:center;gap:.75rem;min-width:0;padding:.5rem .9rem;display:flex}.auth-avatar{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;border-radius:999px;justify-content:center;align-items:center;width:2.35rem;height:2.35rem;font-weight:700;display:inline-flex;box-shadow:0 8px 20px #6366f147}.auth-user-meta{flex-direction:column;gap:.15rem;min-width:0;display:flex}.auth-user-name{color:var(--text-primary);white-space:nowrap;text-overflow:ellipsis;max-width:180px;font-size:.9rem;font-weight:700;overflow:hidden}.auth-user-role{color:var(--text-secondary);font-size:.75rem}.auth-actions{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:.6rem;display:flex}.auth-manage-btn,.auth-logout-btn{min-height:40px}.header{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;margin-bottom:2.5rem;padding-bottom:1.5rem;display:flex}.header h1{background:linear-gradient(135deg,var(--primary-light),var(--accent));-webkit-text-fill-color:transparent;letter-spacing:-.5px;-webkit-background-clip:text;background-clip:text;font-size:1.75rem;font-weight:800}.header nav{gap:.5rem;display:flex}.nav-btn{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg-glass);color:var(--text-secondary);cursor:pointer;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);white-space:nowrap;padding:.6rem 1.2rem;font-size:.875rem;font-weight:500;text-decoration:none;transition:all .3s}.nav-btn:hover,.nav-btn.active{background:var(--primary);color:#fff;border-color:var(--primary);transform:translateY(-1px);box-shadow:0 4px 15px #6366f14d}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);box-shadow:var(--shadow);padding:1.5rem;transition:all .3s}.card:hover{box-shadow:var(--shadow-glow);border-color:#6366f133}.card-title{color:var(--text-primary);margin-bottom:.75rem;font-size:1.1rem;font-weight:700}.dashboard-grid{grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1.25rem;margin-bottom:2rem;display:grid}.stat-card{position:relative;overflow:hidden}.stat-card .stat-icon{margin-bottom:.5rem;font-size:2.5rem}.stat-card .stat-value{background:linear-gradient(135deg,var(--primary-light),var(--accent));-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin-bottom:.25rem;font-size:2.2rem;font-weight:800}.stat-card .stat-label{color:var(--text-secondary);font-size:.875rem;font-weight:500}.action-grid{grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1.25rem;margin-bottom:2rem;display:grid}.action-card{cursor:pointer;text-align:center;padding:2rem;position:relative;overflow:hidden}.action-card:before{content:"";opacity:0;z-index:0;transition:opacity .3s;position:absolute;inset:0}.action-card:hover:before{opacity:1}.action-card.review-action:before{background:linear-gradient(135deg,#6366f11a,#818cf80d)}.action-card.exam-action:before{background:linear-gradient(135deg,#f59e0b1a,#fbbf240d)}.action-card.error-action:before{background:linear-gradient(135deg,#ef44441a,#f871710d)}.action-card .action-icon{z-index:1;margin-bottom:1rem;font-size:3rem;position:relative}.action-card .action-title{z-index:1;margin-bottom:.5rem;font-size:1.25rem;font-weight:700;position:relative}.action-card .action-desc{color:var(--text-secondary);z-index:1;font-size:.9rem;position:relative}.btn{border-radius:var(--radius-sm);cursor:pointer;border:none;justify-content:center;align-items:center;gap:.5rem;padding:.75rem 1.5rem;font-family:inherit;font-size:.95rem;font-weight:600;transition:all .3s;display:inline-flex}.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;box-shadow:0 4px 15px #6366f14d}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px #6366f166}.btn-success{background:linear-gradient(135deg,var(--success),#059669);color:#fff}.btn-success:hover{transform:translateY(-2px)}.btn-warning{background:linear-gradient(135deg,var(--warning),#d97706);color:#fff}.btn-warning:hover{transform:translateY(-2px)}.btn-danger{background:linear-gradient(135deg,var(--danger),#dc2626);color:#fff}.btn-danger:hover{transform:translateY(-2px)}.btn-outline{border:1px solid var(--border);color:var(--text-secondary);background:0 0}.btn-outline:hover{border-color:var(--primary);color:var(--primary-light);background:#6366f11a}.btn-lg{border-radius:var(--radius);padding:1rem 2rem;font-size:1.1rem}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none!important}.btn-group{flex-wrap:wrap;align-items:center;gap:.75rem;display:flex}textarea,input[type=text],input[type=password]{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg-glass);width:100%;color:var(--text-primary);resize:vertical;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);padding:1rem;font-family:inherit;font-size:.95rem;transition:all .3s}textarea:focus,input[type=text]:focus,input[type=password]:focus{border-color:var(--primary);outline:none;box-shadow:0 0 0 3px #6366f126}textarea::placeholder,input::placeholder{color:var(--text-muted)}.question-card{margin-bottom:1.5rem}.question-number{color:var(--primary-light);background:#6366f126;border-radius:8px;align-items:center;gap:.5rem;margin-bottom:1rem;padding:.4rem .75rem;font-size:.8rem;font-weight:600;display:inline-flex}.question-content{color:var(--text-primary);font-size:1.15rem;font-weight:500;line-height:1.8}.answer-section{margin-top:1.5rem}.answer-section label{color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px;margin-bottom:.75rem;font-size:.9rem;font-weight:600;display:block}.standard-answer{border-radius:var(--radius-sm);background:#10b98114;border:1px solid #10b98133;margin-top:1rem;padding:1.25rem;line-height:1.8}.standard-answer h4{color:var(--success);align-items:center;gap:.5rem;margin-bottom:.75rem;display:flex}.ai-evaluation{border-radius:var(--radius-sm);white-space:pre-wrap;background:#6366f114;border:1px solid #6366f133;margin-top:1rem;padding:1.25rem;line-height:1.8}.ai-evaluation h4{color:var(--primary-light);align-items:center;gap:.5rem;margin-bottom:.75rem;display:flex}.score-display{text-align:center;margin:1.5rem 0;padding:2rem}.score-circle{border:4px solid;border-radius:50%;justify-content:center;align-items:center;width:160px;height:160px;margin-bottom:1rem;font-size:3rem;font-weight:800;display:inline-flex}.score-high{border-color:var(--success);color:var(--success)}.score-mid{border-color:var(--warning);color:var(--warning)}.score-low{border-color:var(--danger);color:var(--danger)}.loading{color:var(--text-secondary);flex-direction:column;justify-content:center;align-items:center;padding:3rem;display:flex}.spinner{border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;width:40px;height:40px;margin-bottom:1rem;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.progress-bar{background:var(--bg-glass);border-radius:4px;width:100%;height:8px;margin-top:.5rem;overflow:hidden}.progress-fill{border-radius:4px;height:100%;transition:width .5s}.progress-fill.mastered{background:var(--success)}.progress-fill.fuzzy{background:var(--warning)}.progress-fill.unknown{background:var(--danger)}.badge{border-radius:6px;align-items:center;gap:.25rem;padding:.25rem .6rem;font-size:.75rem;font-weight:600;display:inline-flex}.badge-success{color:var(--success);background:#10b98126}.badge-warning{color:var(--warning);background:#f59e0b26}.badge-danger{color:var(--danger);background:#ef444426}.badge-info{color:var(--info);background:#3b82f626}.hero-card{border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-glow);background:linear-gradient(135deg,#6366f129,#0f0f1ab3),#1e1e32cc;grid-template-columns:1fr;align-items:center;gap:0;margin-bottom:2rem;padding:2.25rem;display:grid}.hero-copy{flex-direction:column;justify-content:center;align-items:flex-start;display:flex}.hero-copy .btn-group{justify-content:flex-start}.hero-eyebrow{color:var(--accent-light);letter-spacing:.08em;text-transform:uppercase;margin-bottom:.75rem;font-size:.85rem}.hero-card h1{letter-spacing:-.03em;margin-bottom:1rem;font-size:2.2rem;line-height:1.2}.hero-desc{color:var(--text-secondary);max-width:42rem;margin-bottom:1.5rem;font-size:1rem;line-height:1.8}.exam-history{margin-top:1.5rem}.exam-history-item{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;padding:.75rem 1rem;font-size:.9rem;display:flex}.exam-history-item:last-child{border-bottom:none}.import-section{margin-top:1.5rem}.import-section select{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg-secondary);color:var(--text-primary);cursor:pointer;margin-right:.75rem;padding:.6rem 1rem;font-family:inherit;font-size:.9rem}.login-page{max-width:560px;margin:0 auto;padding-top:.5rem}.login-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow);text-align:center;max-width:100%;padding:2.2rem}.login-title{letter-spacing:-.03em;margin-bottom:.6rem;font-size:1.8rem;font-weight:800}.login-subtitle{color:var(--text-secondary);margin-bottom:1.5rem;line-height:1.7}.login-tabs{justify-content:center;gap:.6rem;margin-bottom:1.5rem;display:flex}.login-tabs .nav-btn{justify-content:center;min-width:112px}.login-field{text-align:left;margin-bottom:1rem}.login-field label{color:var(--text-secondary);margin-bottom:.5rem;font-size:.9rem;display:block}.login-message{border-radius:var(--radius-sm);color:#fda4af;background:#ef44441f;margin-bottom:1rem;padding:.9rem 1rem;font-size:.9rem}.login-submit{width:100%;margin-top:.5rem}.login-hint{color:var(--text-muted);text-align:center;margin-top:1rem;font-size:.9rem}.back-link{color:var(--text-secondary);align-items:center;gap:.5rem;margin-bottom:1.5rem;font-size:.9rem;font-weight:500;text-decoration:none;transition:color .2s;display:inline-flex}.back-link:hover{color:var(--primary-light)}.empty-state{text-align:center;color:var(--text-muted);padding:4rem 2rem}.empty-state .empty-icon{margin-bottom:1.5rem;font-size:4rem}.empty-state h3{color:var(--text-secondary);margin-bottom:.75rem;font-size:1.25rem}@media (max-width:768px){.app-container{padding:1rem}.global-header{grid-template-columns:1fr;gap:1rem;padding:1rem}.global-header-spacer{display:none}.global-header-left{grid-column:auto;gap:.8rem;width:100%}.auth-header{grid-column:auto;justify-content:center;justify-self:stretch;width:100%}.auth-panel,.auth-actions,.auth-user-chip{justify-content:center;width:100%}.header{text-align:center;flex-direction:column;gap:1rem}.header nav{justify-content:center;width:100%}.dashboard-grid{grid-template-columns:1fr 1fr}.action-grid{grid-template-columns:1fr 1fr;gap:1rem}.hero-card{grid-template-columns:1fr;padding:1.5rem}.hero-copy{text-align:center;align-items:center}.hero-copy .btn-group{justify-content:center}.hero-desc{max-width:none}.hero-card h1{font-size:1.8rem}.btn-group{gap:.5rem}.btn-group .btn{text-align:center;flex:auto;justify-content:center;padding:.6rem 1rem;font-size:.9rem}}@media (max-width:480px){.dashboard-grid{grid-template-columns:1fr 1fr;gap:.75rem}.stat-card{text-align:center;padding:1rem .5rem}.stat-card .stat-icon{font-size:2rem}.stat-card .stat-value{font-size:1.8rem}.action-grid{grid-template-columns:1fr 1fr;gap:.75rem}.action-card{padding:1.25rem .75rem}.action-card .action-icon{margin-bottom:.5rem;font-size:2rem}.action-card .action-title{font-size:1.05rem}.action-card .action-desc{font-size:.75rem}.header h1{font-size:1.4rem}.global-title{font-size:1.45rem}.auth-panel,.auth-actions,.auth-user-chip{justify-content:center;width:100%}.login-card{padding:1.25rem}.card{padding:1rem}}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.fade-in{animation:.4s forwards fadeIn}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.slide-up{animation:.5s forwards slideUp}