:root{--coral: #FF6F4C;--coral-dark: #E0502E;--indigo: #3D3467;--gold: #FFC93C;--success: #3FAE7A;--success-dark: #2E8C61;--warning: #F2A93B;--error: #E14F4F;--info: #4A9FE0;--bg: #FFF9F2;--surface: #FFFFFF;--border: #F0E4D6;--muted: #C9BBA3;--text-secondary: #6B6178;--text-primary: #2A2140;--label: #8A7F6D;--lavender-bg: #EFE9FA;--lavender-text: #3D3467;--coral-bg: #FFE4DA;--radius-card: 20px;--radius-btn: 14px}*{box-sizing:border-box}body{margin:0;font-family:Nunito,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text-primary)}a{color:var(--indigo);text-decoration:none;font-weight:700}a:hover{color:var(--coral)}.back-link{display:inline-block;margin-bottom:16px;font-size:.9rem}h1,h2,h3,.navbar-brand-text{font-family:"Baloo 2",Nunito,sans-serif;font-weight:700;color:var(--text-primary)}.app{min-height:100vh;display:flex;flex-direction:column}.navbar{display:flex;align-items:center;justify-content:space-between;padding:14px 32px;background:#fff9f2eb;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:20}.navbar-brand{display:flex;align-items:center;gap:10px}.navbar-brand-mark{width:32px;height:32px;border-radius:10px;background:var(--coral);color:#fff;display:flex;align-items:center;justify-content:center;font-family:"Baloo 2",sans-serif;font-weight:800;font-size:17px;flex-shrink:0}.navbar-brand-text{font-weight:700;font-size:1.15rem;letter-spacing:-.01em;color:var(--text-primary)}.navbar-menu{display:flex;align-items:center;gap:20px}.navbar nav{display:flex;gap:4px}.navbar nav a{color:var(--text-secondary);text-decoration:none;padding:7px 14px;border-radius:999px;font-size:.92rem;font-weight:700;transition:background .12s ease,color .12s ease}.navbar nav a:hover{background:var(--coral-bg);color:var(--coral-dark)}.navbar nav a.active{background:var(--coral);color:#fff}.navbar-user{display:flex;align-items:center;gap:12px;font-size:.88rem;color:var(--text-secondary);font-weight:700}.navbar-user .account-link{color:var(--text-secondary);text-decoration:none;border-bottom:1px dashed transparent}.navbar-user .account-link:hover,.navbar-user .account-link.active{color:var(--coral-dark);border-bottom-color:var(--coral-dark)}.navbar-user button{background:transparent;color:var(--indigo);border:2px solid var(--indigo);padding:6px 14px;border-radius:var(--radius-btn);cursor:pointer;font-size:.85rem;font-weight:800;font-family:inherit}.navbar-user button:hover{background:var(--indigo);color:#fff}.navbar-toggle{display:none;background:transparent;border:none;font-size:1.4rem;line-height:1;color:var(--indigo);cursor:pointer;padding:6px 8px;border-radius:8px}.navbar-toggle:hover{background:var(--coral-bg)}.lang-select{border:2px solid var(--border);border-radius:999px;padding:4px 28px 4px 12px;font-size:.78rem;font-weight:800;color:var(--text-secondary);background:#fff;cursor:pointer;font-family:inherit;-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--text-secondary) 50%),linear-gradient(135deg,var(--text-secondary) 50%,transparent 50%);background-position:calc(100% - 14px) center,calc(100% - 9px) center;background-size:5px 5px,5px 5px;background-repeat:no-repeat}.lang-select:hover,.lang-select:focus{border-color:var(--coral);color:var(--coral-dark);outline:none}.align-toggle{display:flex;gap:6px;margin-top:4px}.align-toggle button{width:36px;height:32px;border:2px solid var(--border);border-radius:8px;background:#fff;color:var(--text-secondary);font-size:1rem;cursor:pointer;font-family:inherit}.align-toggle button.active{background:var(--coral);border-color:var(--coral);color:#fff}.align-toggle button:hover:not(.active){border-color:var(--coral);color:var(--coral-dark)}.content{flex:1;padding:32px;max-width:980px;margin:0 auto;width:100%}.slide-viewer-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:var(--indigo);color:#fff;z-index:200;display:flex;flex-direction:column}.slide-viewer-header{display:flex;align-items:center;justify-content:space-between;padding:16px 24px}.slide-viewer-title{font-weight:800;font-size:1.05rem}.slide-viewer-counter{font-size:.9rem;opacity:.8;font-weight:700}.slide-viewer-exit{background:#ffffff1f;border:none;color:#fff;width:36px;height:36px;border-radius:50%;font-size:1.3rem;line-height:1;cursor:pointer}.slide-viewer-exit:hover{background:var(--coral)}.slide-viewer-body{flex:1;display:flex;align-items:center;justify-content:center;gap:16px;padding:16px 24px;min-height:0}.slide-viewer-slide{background:#fff;color:var(--text-primary);border-radius:var(--radius-card);padding:48px 56px;width:100%;max-width:820px;height:100%;max-height:560px;overflow-y:auto;box-shadow:0 20px 50px #00000040}.slide-viewer-slide h2{margin-top:0;font-size:1.8rem}.slide-viewer-slide ul{font-size:1.2rem;line-height:1.7}.slide-viewer-image{max-width:100%;max-height:260px;display:block;margin:16px 0;border-radius:12px}.slide-viewer-nav{background:#ffffff1f;border:none;color:#fff;width:48px;height:48px;border-radius:50%;font-size:1.8rem;line-height:1;cursor:pointer;flex-shrink:0}.slide-viewer-nav:hover:not(:disabled){background:var(--coral)}.slide-viewer-nav:disabled{opacity:.25;cursor:default}.slide-viewer-dots{display:flex;justify-content:center;gap:8px;padding:16px}.slide-viewer-dot{width:9px;height:9px;border-radius:50%;border:none;background:#ffffff4d;cursor:pointer;padding:0}.slide-viewer-dot.active{background:var(--coral)}.slide-viewer-empty{margin:auto;text-align:center;display:flex;flex-direction:column;gap:16px;align-items:center}@media (max-width: 760px){.slide-viewer-slide{padding:28px 24px;max-height:none}.slide-viewer-slide h2{font-size:1.3rem}.slide-viewer-slide ul{font-size:1rem}.slide-viewer-nav{width:38px;height:38px;font-size:1.4rem}}@media (max-width: 760px){.navbar{padding:12px 16px}.navbar-toggle{display:block}.navbar-menu{display:none;position:absolute;top:100%;left:0;right:0;flex-direction:column;align-items:stretch;gap:12px;background:var(--bg);border-bottom:1px solid var(--border);padding:14px 16px 18px;box-shadow:0 10px 20px #2a21401a}.navbar-menu.open{display:flex}.navbar nav{flex-direction:column;gap:2px}.navbar nav a{padding:11px 14px}.navbar-user{flex-direction:column;align-items:stretch;gap:8px}.navbar-user button{width:100%;padding:11px 14px}.content{padding:16px}.card{padding:16px 18px}.question-block{padding:16px}.form{margin:24px auto}h1{font-size:1.4rem}h2{font-size:1.25rem}h3{font-size:1.05rem}.stat-row{flex-direction:column}.row{flex-wrap:wrap;row-gap:8px}.option-row{flex-wrap:wrap}table{display:block;overflow-x:auto;white-space:nowrap}th,td{padding:8px}}.center{text-align:center;padding:48px;color:var(--text-secondary)}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);padding:22px 24px;margin-bottom:16px;box-shadow:0 1px 2px #2a21400a}.card h3{margin-top:0;font-size:1.15rem}.stat-row{display:flex;gap:16px;margin-bottom:16px}.stat-card{flex:1;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);padding:20px 22px;box-shadow:0 1px 2px #2a21400a}.stat-value{font-family:"Baloo 2",sans-serif;font-size:1.9rem;font-weight:800;color:var(--text-primary);line-height:1.1}.stat-label{font-size:.85rem;color:var(--label);margin-top:4px;font-weight:700}.badge{display:inline-block;background:var(--lavender-bg);color:var(--lavender-text);font-size:.78rem;font-weight:800;padding:3px 12px;border-radius:999px}.join-code{background:var(--bg);border:1px solid var(--border);padding:3px 10px;border-radius:8px;font-weight:800;letter-spacing:.08em;color:var(--coral-dark)}.form{display:flex;flex-direction:column;gap:14px;max-width:420px;margin:40px auto}.form h2{text-align:center}.auth-brand{display:flex;flex-direction:column;align-items:center;gap:10px;margin-bottom:4px}.auth-brand-mark{width:56px;height:56px;border-radius:16px;background:var(--coral);color:#fff;display:flex;align-items:center;justify-content:center;font-family:"Baloo 2",sans-serif;font-weight:800;font-size:30px;box-shadow:0 4px 14px #ff6f4c59}.auth-brand-text{font-family:"Baloo 2",sans-serif;font-weight:700;font-size:1.7rem;color:var(--text-primary);letter-spacing:-.01em}.auth-tagline{color:var(--text-secondary);font-size:.9rem;text-align:center;margin-top:-6px}.form input,.form select,.form textarea,.input{padding:12px 14px;border:2px solid var(--border);border-radius:12px;font-size:1rem;font-family:inherit;color:var(--text-primary);background:var(--bg)}.form input:focus,.form select:focus,.form textarea:focus,.input:focus,.question-block input:focus,.question-block textarea:focus,.question-block select:focus{outline:none;border-color:var(--coral)}select{padding:10px 38px 10px 14px;border:2px solid var(--border);border-radius:12px;font-size:.95rem;font-family:inherit;color:var(--text-primary);background-color:var(--bg);cursor:pointer;appearance:none;-webkit-appearance:none;-moz-appearance:none}select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%233D3467' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E")!important;background-repeat:no-repeat!important;background-position:right 14px center!important;background-size:12px!important;padding-right:38px!important}select:hover{border-color:var(--muted)}select:focus{outline:none;border-color:var(--coral)}select:disabled{opacity:.6;cursor:not-allowed}.form button,.btn{padding:12px 22px;border:none;border-radius:var(--radius-btn);background:var(--coral);color:#fff;font-size:1rem;font-weight:800;font-family:inherit;cursor:pointer;transition:background .12s ease}.form button:hover,.btn:hover{background:var(--coral-dark)}.btn.secondary{background:transparent;color:var(--indigo);border:2px solid var(--indigo);padding:10px 20px}.btn.secondary:hover{background:var(--indigo);color:#fff}.btn.ghost{background:transparent;color:var(--indigo);padding:10px 18px}.btn.ghost:hover{background:var(--lavender-bg)}.btn.danger{background:var(--error)}.btn.danger:hover{background:#c23d3d}.btn.small{padding:7px 14px;font-size:.85rem;border-radius:10px}.btn.secondary.small,.btn.ghost.small{padding:6px 13px}.btn:disabled{opacity:.5;cursor:not-allowed}.btn:disabled:hover{background:var(--coral)}.btn{display:inline-block;text-decoration:none;text-align:center}.error{color:var(--error);font-size:.9rem;font-weight:700}.success{color:var(--success);font-size:.9rem;font-weight:700}.row{display:flex;justify-content:space-between;align-items:center;gap:12px}.muted{color:var(--text-secondary);font-size:.85rem}.question-block{border:1px solid var(--border);border-radius:var(--radius-card);padding:20px;margin-bottom:14px;position:relative;background:var(--surface)}.question-block label{display:block;font-size:.85rem;font-weight:800;color:var(--label);margin-bottom:4px;margin-top:12px}.question-block input,.question-block select,.question-block textarea{padding:10px 12px;border:2px solid var(--border);border-radius:10px;font-family:inherit;font-size:.95rem;color:var(--text-primary);background:var(--bg)}.option-row{display:flex;gap:8px;align-items:center;margin-bottom:6px}.option-row input[type=text]{flex:1}.option-row input[type=radio]{accent-color:var(--coral);width:18px;height:18px}table{width:100%;border-collapse:collapse}th{text-align:left;padding:8px 10px;border-bottom:2px solid var(--border);font-size:.78rem;text-transform:uppercase;letter-spacing:.04em;color:var(--label);font-weight:800}td{text-align:left;padding:10px;border-bottom:1px solid var(--border)}.answer-review{border-left:4px solid var(--muted);padding:12px 16px;margin-bottom:10px;background:var(--bg);border-radius:0 12px 12px 0}.answer-review.correct{border-left-color:var(--success)}.answer-review.incorrect{border-left-color:var(--error)}.answer-review.pending{border-left-color:var(--warning)}