:root{--bg-primary: #f8f9fc;--bg-secondary: #ffffff;--bg-card: #ffffff;--bg-card-hover: #f1f5f9;--accent-primary: #6366f1;--accent-secondary: #8b5cf6;--accent-wordwall: #f59e0b;--accent-kahoot: #10b981;--text-primary: #1e293b;--text-secondary: #475569;--text-muted: #94a3b8;--gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);--gradient-wordwall: linear-gradient(135deg, #f59e0b 0%, #fbbf24 100%);--gradient-kahoot: linear-gradient(135deg, #10b981 0%, #34d399 100%);--gradient-header: linear-gradient(180deg, rgba(99, 102, 241, .08) 0%, transparent 100%);--grade-5-color: #ef4444;--grade-6-color: #3b82f6;--grade-7-color: #fde047;--grade-8-color: #22c55e;--shadow-sm: 0 2px 8px rgba(0, 0, 0, .2);--shadow-md: 0 4px 16px rgba(0, 0, 0, .3);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .4);--shadow-glow: 0 0 30px rgba(99, 102, 241, .3);--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 24px;--transition-fast: .15s ease;--transition-normal: .25s ease;--transition-slow: .4s ease}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:Outfit,-apple-system,BlinkMacSystemFont,sans-serif;background-color:var(--bg-primary);color:var(--text-primary);min-height:100vh;line-height:1.6;font-size:18px}#app{min-height:100vh;position:relative}.visitor-counter{position:fixed;top:20px;right:20px;z-index:1000;display:flex;align-items:center;gap:8px;padding:10px 18px;background:linear-gradient(135deg,#6366f1,#8b5cf6);border-radius:var(--radius-xl);box-shadow:0 4px 20px #6366f166;color:#fff}.visitor-label{font-size:1rem;font-weight:600}.visitor-number{font-size:1.2rem;font-weight:700;min-width:30px;text-align:center}@media(max-width:600px){.visitor-counter{top:10px;right:10px;padding:8px 14px;gap:6px}.visitor-label{font-size:.85rem}.visitor-number{font-size:1rem}}.footer{padding:60px 20px 40px;text-align:center}.footer-text{color:#64748b;font-size:1.1rem;margin:0}.loading{display:flex;align-items:center;justify-content:center;min-height:100vh;font-size:1.5rem;color:#667eea;font-weight:600}.header{position:relative;padding:60px 20px 80px;text-align:center;background:var(--gradient-header);overflow:hidden}.header:before{content:"";position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(ellipse at center,rgba(99,102,241,.08) 0%,transparent 70%);animation:pulse 8s ease-in-out infinite}@keyframes pulse{0%,to{transform:scale(1);opacity:.5}50%{transform:scale(1.1);opacity:1}}.header-content{position:relative;z-index:1}.logo{font-size:3rem;font-weight:700;color:#ef4444;margin-bottom:16px;letter-spacing:-.02em}.tagline{font-size:1.5rem;color:var(--text-secondary);font-weight:400;max-width:600px;margin:0 auto}.video-count{display:inline-flex;align-items:center;gap:8px;margin-top:24px;padding:12px 24px;background:var(--bg-card);border-radius:var(--radius-xl);border:1px solid rgba(99,102,241,.3);box-shadow:var(--shadow-glow)}.video-count-number{font-size:1.5rem;font-weight:700;color:var(--accent-primary)}.video-count-text{color:var(--text-secondary);font-size:1.1rem}.section-title{font-size:1.75rem;font-weight:600;color:var(--text-primary);margin-bottom:32px;text-align:center}.grade-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;max-width:900px;margin:0 auto}@media(max-width:800px){.grade-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:500px){.grade-grid{grid-template-columns:1fr;max-width:300px}}.grade-card{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;aspect-ratio:1;border-radius:var(--radius-xl);border:none;text-decoration:none;transition:all var(--transition-normal);overflow:hidden;box-shadow:0 4px 20px #00000026}.grade-card--5{background:linear-gradient(135deg,#ef4444,#dc2626)}.grade-card--6{background:linear-gradient(135deg,#3b82f6,#2563eb)}.grade-card--7{background:linear-gradient(135deg,#fde047,#facc15)}.grade-card--8{background:linear-gradient(135deg,#22c55e,#16a34a)}.grade-card .grade-number{background:none!important;-webkit-background-clip:unset!important;background-clip:unset!important;-webkit-text-fill-color:white;color:#fff}.grade-card .grade-label{color:#ffffffe6}.grade-card--5:hover{box-shadow:0 8px 30px #ef444466;transform:translateY(-8px) scale(1.02)}.grade-card--6:hover{box-shadow:0 8px 30px #3b82f666;transform:translateY(-8px) scale(1.02)}.grade-card--7:hover{box-shadow:0 8px 30px #eab30866;transform:translateY(-8px) scale(1.02)}.grade-card--8:hover{box-shadow:0 8px 30px #22c55e66;transform:translateY(-8px) scale(1.02)}.header-banner{max-width:100%;max-height:200px;width:auto;height:auto;margin:20px auto;border-radius:var(--radius-lg);object-fit:contain}.grade-card-content{position:relative;z-index:1;display:flex;flex-direction:column;align-items:center;gap:4px}.grade-number{font-size:4rem;font-weight:700;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1}.grade-label{font-size:1.5rem;font-weight:500;color:var(--text-secondary)}.grade-card--disabled{opacity:.5;cursor:not-allowed;pointer-events:none}.coming-soon{position:absolute;bottom:16px;font-size:1.25rem;font-weight:700;color:#ffffffb3;text-transform:uppercase;letter-spacing:.08em}.unit-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}@media(max-width:900px){.unit-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:600px){.unit-grid{grid-template-columns:1fr}}.unit-card{display:flex;flex-direction:column;align-items:center;gap:12px;padding:32px 24px;background:var(--bg-card);border-radius:var(--radius-lg);border:1px solid rgba(255,255,255,.05);text-decoration:none;transition:all var(--transition-normal)}.unit-card:hover{transform:translateY(-6px);border-color:#6366f14d;box-shadow:var(--shadow-lg)}.unit-number{display:flex;align-items:center;justify-content:center;width:48px;height:48px;background:var(--gradient-primary);border-radius:50%;font-size:1.5rem;font-weight:700;color:#fff}.unit-name{font-size:1.2rem;font-weight:600;color:var(--text-primary);text-align:center;line-height:1.4}.unit-video-count{font-size:1rem;color:var(--text-muted);padding:6px 14px;background:var(--bg-secondary);border-radius:var(--radius-sm)}.unit-card{animation:fadeInUp .4s ease forwards;opacity:0}.unit-card:nth-child(1){animation-delay:.05s}.unit-card:nth-child(2){animation-delay:.1s}.unit-card:nth-child(3){animation-delay:.15s}.unit-card:nth-child(4){animation-delay:.2s}.unit-card:nth-child(5){animation-delay:.25s}.unit-card:nth-child(6){animation-delay:.3s}.back-button{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;background:#ffffff1a;border-radius:var(--radius-md);color:var(--text-secondary);text-decoration:none;font-weight:500;font-size:1.1rem;transition:all var(--transition-fast);margin-bottom:20px}.back-button:hover{background:#ffffff26;color:var(--text-primary)}.back-button--large{margin-top:24px;padding:14px 28px;font-size:1rem}.back-icon{width:18px;height:18px}.header--compact{padding:40px 20px 50px}.header--compact .logo{margin-bottom:8px}.logo--small{font-size:2rem}.grade-card{animation:fadeInUp .5s ease forwards;opacity:0}.grade-card:nth-child(1){animation-delay:.1s}.grade-card:nth-child(2){animation-delay:.2s}.grade-card:nth-child(3){animation-delay:.3s}.grade-card:nth-child(4){animation-delay:.4s}.container{max-width:1400px;margin:0 auto;padding:0 24px 80px}.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px}@media(max-width:1200px){.video-grid{grid-template-columns:repeat(3,1fr)}}@media(max-width:900px){.video-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:600px){.video-grid{grid-template-columns:1fr}.header{padding:40px 16px 60px}.logo{font-size:2rem}.tagline{font-size:1rem}}.video-card{background:var(--bg-card);border-radius:var(--radius-lg);overflow:hidden;transition:transform var(--transition-normal),box-shadow var(--transition-normal);border:1px solid rgba(255,255,255,.05)}.video-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);border-color:#6366f14d}.video-title{padding:16px 16px 12px;font-size:1.15rem;font-weight:600;color:var(--text-primary);line-height:1.4;min-height:60px;display:flex;align-items:center}.video-embed{position:relative;width:100%;padding-bottom:56.25%;background:var(--bg-secondary)}.video-embed iframe{position:absolute;top:0;left:0;width:100%;height:100%;border:none}.video-links{display:flex;flex-direction:column;gap:10px;padding:16px}.link-btn{display:flex;align-items:center;justify-content:center;gap:10px;padding:12px 16px;border-radius:var(--radius-md);text-decoration:none;font-weight:600;font-size:1.1rem;transition:all var(--transition-fast);position:relative;overflow:hidden}.link-btn:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.15),transparent);transition:left var(--transition-slow)}.link-btn:hover:before{left:100%}.link-btn--wordwall{background:var(--gradient-wordwall);color:#1a1a25;box-shadow:0 4px 14px #f59e0b4d}.link-btn--wordwall:hover{transform:scale(1.02);box-shadow:0 6px 20px #f59e0b66}.link-btn--kahoot{background:linear-gradient(135deg,#3b82f6,#2563eb);color:#fff;box-shadow:0 4px 14px #3b82f64d}.link-btn--kahoot:hover{transform:scale(1.02);box-shadow:0 6px 20px #3b82f666}.link-btn--disabled{opacity:.5;cursor:not-allowed;background:linear-gradient(135deg,#94a3b8,#64748b);box-shadow:0 4px 14px #64748b33}.link-btn--disabled:hover{transform:none;box-shadow:0 4px 14px #64748b33}.link-btn--disabled:before{display:none}.wordwall-buttons{display:flex;gap:8px}.wordwall-buttons .link-btn{flex:1;padding:10px 12px;font-size:1rem}.link-btn--wordwall-kitaplik{background:linear-gradient(135deg,#fde047,#facc15);color:#1a1a25;box-shadow:0 4px 14px #fde04766}.link-btn--wordwall-kitaplik:hover{transform:scale(1.02);box-shadow:0 6px 20px #fde04780}.link-btn--wordwall-carkifelek{background:linear-gradient(135deg,#ef4444,#dc2626);color:#fff;box-shadow:0 4px 14px #ef44444d}.link-btn--wordwall-carkifelek:hover{transform:scale(1.02);box-shadow:0 6px 20px #ef444466}.link-icon{width:20px;height:20px;flex-shrink:0}.empty-state{grid-column:1 / -1;text-align:center;padding:80px 24px;color:var(--text-muted)}.empty-state-icon{font-size:4rem;margin-bottom:16px}.empty-state-text{font-size:1.25rem}.footer{text-align:center;padding:40px 24px;background:var(--bg-secondary);border-top:1px solid rgba(255,255,255,.05)}.footer-text{color:var(--text-muted);font-size:1.1rem}.video-card{animation:fadeInUp .5s ease forwards;opacity:0}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.video-card:nth-child(1){animation-delay:.05s}.video-card:nth-child(2){animation-delay:.1s}.video-card:nth-child(3){animation-delay:.15s}.video-card:nth-child(4){animation-delay:.2s}.video-card:nth-child(5){animation-delay:.25s}.video-card:nth-child(6){animation-delay:.3s}.video-card:nth-child(7){animation-delay:.35s}.video-card:nth-child(8){animation-delay:.4s}.video-card:nth-child(9){animation-delay:.45s}.video-card:nth-child(10){animation-delay:.5s}.video-card:nth-child(11){animation-delay:.55s}.video-card:nth-child(12){animation-delay:.6s}::-webkit-scrollbar{width:10px}::-webkit-scrollbar-track{background:var(--bg-secondary)}::-webkit-scrollbar-thumb{background:var(--bg-card);border-radius:5px}::-webkit-scrollbar-thumb:hover{background:var(--bg-card-hover)}.header--grade-5{background:linear-gradient(180deg,rgba(239,68,68,.1) 0%,transparent 100%)}.header--grade-6{background:linear-gradient(180deg,rgba(59,130,246,.1) 0%,transparent 100%)}.header--grade-7{background:linear-gradient(180deg,rgba(251,191,36,.15) 0%,transparent 100%)}.header--grade-8{background:linear-gradient(180deg,rgba(34,197,94,.1) 0%,transparent 100%)}.logo--grade-5{background:linear-gradient(135deg,#ef4444,#dc2626);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.logo--grade-6{background:linear-gradient(135deg,#3b82f6,#2563eb);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.logo--grade-7{background:linear-gradient(135deg,#fbbf24,#f59e0b);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.logo--grade-8{background:linear-gradient(135deg,#22c55e,#16a34a);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.back-button--grade-5{background:#ef444426;color:#dc2626}.back-button--grade-5:hover{background:#ef444440}.back-button--grade-6{background:#3b82f626;color:#2563eb}.back-button--grade-6:hover{background:#3b82f640}.back-button--grade-7{background:#fbbf2433;color:#b45309}.back-button--grade-7:hover{background:#fbbf2459}.back-button--grade-8{background:#22c55e26;color:#16a34a}.back-button--grade-8:hover{background:#22c55e40}.unit-card--grade-5 .unit-number{background:linear-gradient(135deg,#ef4444,#dc2626)}.unit-card--grade-5:hover{border-color:#ef4444;box-shadow:0 8px 30px #ef444433}.unit-card--grade-6 .unit-number{background:linear-gradient(135deg,#3b82f6,#2563eb)}.unit-card--grade-6:hover{border-color:#3b82f6;box-shadow:0 8px 30px #3b82f633}.unit-card--grade-7 .unit-number{background:linear-gradient(135deg,#fbbf24,#f59e0b)}.unit-card--grade-7:hover{border-color:#fbbf24;box-shadow:0 8px 30px #fbbf2433}.unit-card--grade-8 .unit-number{background:linear-gradient(135deg,#22c55e,#16a34a)}.unit-card--grade-8:hover{border-color:#22c55e;box-shadow:0 8px 30px #22c55e33}.video-count--grade-5{border-color:#ef44444d;box-shadow:0 0 20px #ef444426}.video-count--grade-5 .video-count-number{color:#ef4444}.video-count--grade-6{border-color:#3b82f64d;box-shadow:0 0 20px #3b82f626}.video-count--grade-6 .video-count-number{color:#3b82f6}.video-count--grade-7{border-color:#fbbf244d;box-shadow:0 0 20px #fbbf2426}.video-count--grade-7 .video-count-number{color:#f59e0b}.video-count--grade-8{border-color:#22c55e4d;box-shadow:0 0 20px #22c55e26}.video-count--grade-8 .video-count-number{color:#22c55e}.login-screen{display:flex;align-items:center;justify-content:center;min-height:100vh;background:linear-gradient(135deg,#6366f1,#8b5cf6);font-family:Outfit,sans-serif}.login-screen.hidden{display:none}.login-container{width:100%;max-width:400px;padding:20px}.login-box{background:#fff;border-radius:12px;padding:40px;box-shadow:0 20px 60px #0000004d}.login-title{margin:0 0 8px;font-size:28px;font-weight:700;color:#1e293b;text-align:center}.login-subtitle{margin:0 0 30px;font-size:14px;color:#94a3b8;text-align:center}.login-form{display:flex;flex-direction:column;gap:20px}.form-group{display:flex;flex-direction:column;gap:8px}.form-group label{font-size:14px;font-weight:600;color:#1e293b}.form-group input{padding:10px 14px;font-size:14px;border:2px solid #e2e8f0;border-radius:8px;font-family:Outfit,sans-serif;transition:border-color .3s ease}.form-group input:focus{outline:none;border-color:#6366f1;box-shadow:0 0 0 3px #6366f11a}.login-button{padding:12px 16px;font-size:16px;font-weight:600;color:#fff;background:linear-gradient(135deg,#6366f1,#8b5cf6);border:none;border-radius:8px;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease;margin-top:10px}.login-button:hover{transform:translateY(-2px);box-shadow:0 10px 20px #6366f14d}.login-button:active{transform:translateY(0)}.login-error{padding:12px 14px;font-size:13px;color:#dc2626;background-color:#fee2e2;border-radius:6px;display:none;text-align:center}.login-error.show{display:block}#app.hidden{display:none}