.spinner-overlay{display:flex;justify-content:center;align-items:center;padding:40px}.spinner{border:4px solid rgba(0,0,0,.1);width:36px;height:36px;border-radius:50%;border-left-color:var(--primary-color);animation:spin 1s ease infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.downloader-container{width:100%;max-width:700px;background:var(--glass-bg-color);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);padding:35px;border-radius:20px;box-shadow:0 20px 40px var(--shadow-color),0 0 0 1px var(--border-color);border:1px solid var(--border-color);transition:all .3s ease}.help-section{margin-top:20px;padding-top:20px;border-top:1px solid var(--border-color)}.help-title{margin:0 0 15px;font-size:1.1rem;font-weight:500;color:var(--subtitle-color);text-align:left}.help-list{list-style:none;padding:0;margin:0}.help-item{display:flex;align-items:flex-start;margin-bottom:8px;font-size:.9rem;line-height:1.4}.help-item:last-child{margin-bottom:0}.help-icon{color:var(--subtitle-color);font-weight:500;margin-right:8px;flex-shrink:0}.help-text{color:var(--subtitle-color);margin:0;flex:1;text-align:left}.input-wrapper{display:flex;width:100%;margin-bottom:20px}.url-input{flex-grow:1;border:2px solid var(--border-color);padding:16px 20px;font-size:1rem;border-radius:12px 0 0 12px;transition:all .3s ease;background:#ffffff80;backdrop-filter:blur(5px);-webkit-backdrop-filter:blur(5px)}.url-input:focus{outline:none;border-color:var(--primary-color)}.analyze-button{border:none;background:linear-gradient(135deg,var(--primary-color) 0%,var(--primary-hover-color) 100%);color:#fff;padding:16px 35px;font-size:1rem;font-weight:600;cursor:pointer;border-radius:0 12px 12px 0;transition:all .3s ease;white-space:nowrap;box-shadow:0 4px 15px #667eea4d;position:relative;overflow:hidden}.analyze-button:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.2),transparent);transition:left .5s}.analyze-button:hover:before{left:100%}.analyze-button:hover{background-color:var(--primary-hover-color)}.analyze-button:disabled{background-color:#ccc;cursor:not-allowed}.error-message{color:var(--error-color);background:var(--error-bg-color);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid var(--error-color);padding:18px;border-radius:12px;margin-top:20px;font-weight:500;box-shadow:0 8px 25px #e53e3e26}.result-wrapper{margin-top:30px;text-align:left;background:var(--glass-bg-color);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);padding:25px;border-radius:16px;border:1px solid var(--border-color);box-shadow:0 15px 35px var(--shadow-color)}.video-title{font-size:1.5rem;font-weight:600;margin-bottom:15px}.video-container{position:relative;padding-top:56.25%;background-color:#000;border-radius:12px;overflow:hidden;margin-bottom:20px}.video-player{position:absolute;top:0;left:0;width:100%;height:100%}.video-fallback{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);text-align:center;color:#fff;background:#000c;padding:20px;border-radius:8px;margin:0}.fallback-download-link{color:#60a5fa;text-decoration:underline;margin-left:8px;display:inline-block}.fallback-download-link:hover{color:#3b82f6}.video-description{font-size:1rem;color:var(--subtitle-color);line-height:1.6;white-space:pre-wrap;margin-bottom:25px}.download-link{display:block;width:100%;padding:18px;background:linear-gradient(135deg,var(--primary-color) 0%,var(--primary-hover-color) 100%);color:#fff;text-align:center;text-decoration:none;font-size:1.1rem;font-weight:600;border-radius:12px;transition:all .3s ease;box-shadow:0 8px 25px #667eea4d;position:relative;overflow:hidden}.download-link:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.2),transparent);transition:left .5s}.download-link:hover:before{left:100%}.download-link:hover{transform:translateY(-2px);box-shadow:0 12px 35px #667eea66}.download-link:hover{background-color:var(--primary-hover-color)}.animate-fade-in{animation:fadeIn .5s ease-in-out}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media (max-width: 768px){.downloader-container{padding:20px}.help-section{margin-top:15px;padding-top:15px}.help-title{font-size:1rem}.help-item{font-size:.85rem;margin-bottom:6px}.input-wrapper{flex-direction:column}.url-input,.analyze-button{border-radius:8px}.analyze-button{margin-top:10px}}:root{--primary-color: #667eea;--primary-hover-color: #5a67d8;--background-gradient-1: #667eea;--background-gradient-2: #764ba2;--background-color: #f7fafc;--container-bg-color: rgba(255, 255, 255, .95);--glass-bg-color: rgba(255, 255, 255, .85);--text-color: #2d3748;--subtitle-color: #718096;--border-color: rgba(255, 255, 255, .18);--error-color: #e53e3e;--error-bg-color: rgba(229, 62, 62, .1);--shadow-color: rgba(0, 0, 0, .1);--shadow-hover-color: rgba(0, 0, 0, .15)}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:linear-gradient(135deg,var(--background-gradient-1) 0%,var(--background-gradient-2) 100%);min-height:100vh;color:var(--text-color);position:relative}body:before{content:"";position:fixed;top:0;left:0;right:0;bottom:0;background:radial-gradient(circle at 20% 80%,rgba(255,255,255,.1) 0%,transparent 50%),radial-gradient(circle at 80% 20%,rgba(255,255,255,.1) 0%,transparent 50%),radial-gradient(circle at 40% 40%,rgba(255,255,255,.05) 0%,transparent 50%);pointer-events:none;z-index:0}.App{text-align:center;position:relative;z-index:1}.App-header{background:linear-gradient(135deg,var(--glass-bg-color) 0%,rgba(102,126,234,.1) 50%,var(--glass-bg-color) 100%);backdrop-filter:blur(15px);-webkit-backdrop-filter:blur(15px);padding:45px 25px;border-bottom:1px solid var(--border-color);box-shadow:0 10px 40px var(--shadow-color),inset 0 1px #fff3;position:relative;overflow:hidden}.App-header:before{content:"";position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(circle,rgba(102,126,234,.1) 0%,transparent 70%),radial-gradient(circle,rgba(118,75,162,.05) 0%,transparent 70%);animation:float 20s ease-in-out infinite;pointer-events:none}@keyframes float{0%,to{transform:translate(0) rotate(0)}33%{transform:translate(30px,-30px) rotate(120deg)}66%{transform:translate(-20px,20px) rotate(240deg)}}.App-header h1{margin:0;font-size:2.8rem;font-weight:700;color:#fff;text-shadow:0 2px 10px rgba(102,126,234,.5),0 0 20px rgba(118,75,162,.3),0 0 30px rgba(0,0,0,.2);position:relative;z-index:2}.subtitle{margin:15px 0 0;color:#fffffff2;font-size:1.2rem;font-weight:500;position:relative;z-index:2;text-shadow:0 1px 8px rgba(0,0,0,.3),0 0 15px rgba(102,126,234,.2)}main{display:flex;flex-direction:column;align-items:center;padding:30px 20px;min-height:calc(100vh - 200px)}footer{padding:35px;margin-top:auto;color:var(--subtitle-color);font-size:.95rem;background:linear-gradient(135deg,var(--glass-bg-color) 0%,rgba(118,75,162,.1) 50%,var(--glass-bg-color) 100%);backdrop-filter:blur(15px);-webkit-backdrop-filter:blur(15px);border-top:1px solid var(--border-color);box-shadow:0 -10px 40px var(--shadow-color),inset 0 1px #fff3;position:relative;overflow:hidden}footer:before{content:"";position:absolute;top:-50%;right:-50%;width:200%;height:200%;background:radial-gradient(circle,rgba(118,75,162,.08) 0%,transparent 70%),radial-gradient(circle,rgba(102,126,234,.05) 0%,transparent 70%);animation:float-reverse 25s ease-in-out infinite;pointer-events:none}@keyframes float-reverse{0%,to{transform:translate(0) rotate(0)}33%{transform:translate(-25px,25px) rotate(-120deg)}66%{transform:translate(15px,-15px) rotate(-240deg)}}@media (max-width: 768px){.App-header h1{font-size:2rem}.subtitle{font-size:1rem}}