:root{--yt-primary:#d10000;--yt-primary-h:#a80000;--yt-primary-l:#ff2020;--yt-primary-rgb:209,0,0;--yt-soft:#fff5f5;--yt-soft-2:#ffe8e8;--yt-dark:#0f172a;--yt-muted:#475569;--yt-muted-2:#94a3b8;--yt-border:rgba(209,0,0,.1);--yt-bg-card:#ffffff;--yt-bg-input:#f8fafc;--yt-shadow:0 20px 60px rgba(0,0,0,.11);--yt-shadow-sm:0 8px 28px rgba(0,0,0,.09);--yt-radius:20px;--yt-radius-sm:12px;--yt-transition:.25s cubic-bezier(.4,0,.2,1)}.yt-tool-form *,.yt-result *,.yt-result-card *{box-sizing:border-box}.yt-error{text-align:center;color:var(--yt-primary);font-weight:700;font-size:clamp(13px,1.5vw,15px);margin:20px auto;padding:16px 20px;background:var(--yt-soft);border-radius:14px;border:1px solid rgba(var(--yt-primary-rgb),.2);max-width:600px;display:flex;align-items:center;justify-content:center;gap:8px}.yt-loading{display:flex;align-items:center;justify-content:center;gap:14px;padding:48px 16px;color:var(--yt-primary);font-weight:600;font-size:15px}.yt-spinner{width:36px;height:36px;border:3px solid #ffe5e5;border-top-color:var(--yt-primary);border-radius:50%;animation:ytSpin .7s linear infinite;flex-shrink:0}@keyframes ytSpin{to{transform:rotate(360deg)}}.yt-skeleton-wrap{max-width:600px;margin:40px auto;padding:28px;background:var(--yt-bg-card);border-radius:var(--yt-radius);box-shadow:var(--yt-shadow);border:1px solid var(--yt-border)}.yt-skeleton-avatar{width:80px;height:80px;border-radius:50%;margin:0 auto 16px}.yt-skeleton-line{height:14px;border-radius:7px;margin-bottom:10px}.yt-skeleton-line.w100{width:100%}.yt-skeleton-line.w70{width:70%;margin-left:auto;margin-right:auto}.yt-skeleton-line.w50{width:50%;margin-left:auto;margin-right:auto}.yt-skeleton-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:16px}.yt-skeleton-box{height:72px;border-radius:12px}.yt-skeleton-avatar,.yt-skeleton-line,.yt-skeleton-box{background:linear-gradient(90deg,#f0f0f0 25%,#e0e0e0 37%,#f0f0f0 63%);background-size:400px 100%;animation:ytShimmer 1.4s ease infinite}@keyframes ytShimmer{0%{background-position:-400px 0}100%{background-position:400px 0}}.yt-tool-form{max-width:640px;margin:32px auto;display:flex;gap:12px;flex-wrap:wrap}.yt-tool-form input,.yt-tool-form select{flex:1!important;min-width:200px!important;padding:15px 18px!important;font-size:clamp(14px,1.5vw,15px)!important;border-radius:var(--yt-radius-sm)!important;border:1.5px solid #e2e8f0!important;background:var(--yt-bg-input)!important;color:var(--yt-dark)!important;font-family:inherit!important;outline:none!important;box-sizing:border-box!important;min-height:50px!important;-webkit-appearance:none!important;appearance:none!important;transition:border-color var(--yt-transition),box-shadow var(--yt-transition),background var(--yt-transition),transform 0.15s ease!important}.yt-tool-form input:focus,.yt-tool-form select:focus{border-color:var(--yt-primary)!important;background:#ffffff!important;box-shadow:0 0 0 3px rgba(var(--yt-primary-rgb),.12)!important;transform:translateY(-1px)}.yt-tool-form input:hover,.yt-tool-form select:hover{border-color:rgba(var(--yt-primary-rgb),.4)!important}.yt-tool-form input::placeholder{color:var(--yt-muted-2)!important;font-size:14px}.yt-tool-form select{cursor:pointer!important;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23475569' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E")!important;background-repeat:no-repeat!important;background-position:right 16px center!important;padding-right:40px!important}.yt-tool-form input:focus,.yt-tool-form select:focus{border-color:var(--yt-primary);background:#fff;box-shadow:0 0 0 3px rgba(var(--yt-primary-rgb),.12)}.yt-tool-form input::placeholder{color:var(--yt-muted-2);font-size:14px}.yt-tool-form select{cursor:pointer;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23475569' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 16px center;padding-right:40px;appearance:none}.yt-tool-form button{padding:15px 28px;min-height:50px;background:linear-gradient(135deg,var(--yt-primary),var(--yt-primary-l));color:#fff;border:none;border-radius:var(--yt-radius-sm);font-size:clamp(14px,1.5vw,15px);font-weight:700;cursor:pointer;font-family:inherit;transition:background var(--yt-transition),transform var(--yt-transition),box-shadow var(--yt-transition);white-space:nowrap;box-shadow:0 8px 24px rgba(var(--yt-primary-rgb),.35);display:inline-flex;align-items:center;gap:8px;-webkit-tap-highlight-color:#fff0;will-change:transform}.yt-tool-form button:hover{background:linear-gradient(135deg,var(--yt-primary-h),var(--yt-primary));transform:translateY(-2px);box-shadow:0 14px 36px rgba(var(--yt-primary-rgb),.42)}.yt-tool-form button:active{transform:translateY(1px);box-shadow:0 4px 12px rgba(var(--yt-primary-rgb),.3)}.yt-tool-form button:disabled{opacity:.65;cursor:not-allowed;transform:none!important}.yt-compare-form{max-width:880px!important;display:grid!important;grid-template-columns:1fr 1fr auto!important;gap:12px!important;flex-wrap:unset!important}.yt-grid-form{max-width:780px!important;display:grid!important;gap:12px!important;flex-wrap:unset!important}.yt-result-card,.yt-video-result,.yt-short-result,.yt-frequency-result,.yt-best-time,.yt-svsl-result,.yt-rpm-result,.yt-growth-result,.yt-tag-result{background:var(--yt-bg-card);padding:clamp(24px,5vw,38px) clamp(20px,5vw,34px);border-radius:var(--yt-radius);max-width:620px;margin:36px auto;box-shadow:var(--yt-shadow);text-align:center;border:1px solid var(--yt-border);animation:ytFadeUp .4s cubic-bezier(.2,.8,.2,1);position:relative;overflow:hidden}.yt-result-card::before,.yt-video-result::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--yt-primary),var(--yt-primary-l))}@keyframes ytFadeUp{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:translateY(0)}}.yt-channel-logo,.yt-result-card img,.yt-growth-result img{width:90px;height:90px;border-radius:50%;margin-bottom:14px;border:3px solid rgba(var(--yt-primary-rgb),.2);box-shadow:0 8px 24px rgb(0 0 0 / .15);object-fit:cover}.yt-result-card h2,.yt-video-result h2{font-size:clamp(16px,2.5vw,20px);font-weight:800;color:var(--yt-dark);margin:0 0 6px}.yt-video-stats,.yt-growth-stats,.yt-metrics{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:20px}.yt-video-stats div,.yt-growth-stats p,.yt-metrics div{background:linear-gradient(135deg,var(--yt-soft),var(--yt-soft-2));padding:16px 12px;border-radius:14px;border:1px solid rgba(var(--yt-primary-rgb),.12);transition:transform var(--yt-transition),box-shadow var(--yt-transition)}.yt-video-stats div:hover,.yt-metrics div:hover{transform:translateY(-3px);box-shadow:0 10px 28px rgba(var(--yt-primary-rgb),.14)}.yt-video-stats strong,.yt-growth-stats strong,.yt-metrics strong{display:block;font-size:clamp(16px,2.5vw,20px);font-weight:800;color:var(--yt-primary);margin-bottom:4px}.yt-video-stats span,.yt-growth-stats span,.yt-metrics span{font-size:12px;color:var(--yt-muted);font-weight:500}.yt-anim{font-size:clamp(40px,8vw,56px);font-weight:800;color:var(--yt-primary);font-variant-numeric:tabular-nums;line-height:1;margin:10px 0 6px;display:block;font-family:-apple-system,BlinkMacSystemFont,monospace;letter-spacing:-1px}.yt-sub-short{font-size:15px;color:var(--yt-muted);margin-top:8px;display:block}.yt-performance{margin-top:18px;font-size:clamp(14px,1.8vw,16px);font-weight:700;padding:12px 22px;background:linear-gradient(135deg,var(--yt-soft),var(--yt-soft-2));border-radius:12px;border:1px solid rgba(var(--yt-primary-rgb),.15);display:inline-block}.yt-performance strong{color:var(--yt-primary)}.yt-engagement{background:linear-gradient(135deg,#ffe2e2,#ffd0d0)!important;border-color:rgba(var(--yt-primary-rgb),.25)!important}.yt-earn{font-size:clamp(22px,4vw,30px);font-weight:800;color:var(--yt-primary);margin-top:16px;line-height:1.2}.yt-earn strong{color:var(--yt-primary)}.desc{display:block;margin-top:12px;font-size:13px;color:var(--yt-muted-2);line-height:1.65;text-align:center}.yt-tag-result{text-align:left}.tag-box{margin-bottom:22px;position:relative}.tag-title{font-weight:700;font-size:14px;margin-bottom:8px;display:block;color:var(--yt-primary)}.copy-btn{position:absolute;top:0;right:0;background:linear-gradient(135deg,#0f172a,#1e293b);color:#fff;border:0;padding:8px 14px;font-size:12px;font-weight:700;border-radius:8px;cursor:pointer;transition:background var(--yt-transition),transform var(--yt-transition);min-height:36px}.copy-btn:hover{background:var(--yt-primary);transform:translateY(-1px)}textarea{width:100%;height:88px;padding:12px;border-radius:10px;border:1.5px solid #e2e8f0;font-size:13px;resize:vertical;font-family:"SF Mono",Consolas,monospace;background:var(--yt-bg-input);transition:border-color var(--yt-transition);box-sizing:border-box;color:var(--yt-dark)}textarea:focus{outline:none;border-color:var(--yt-primary);box-shadow:0 0 0 3px rgba(var(--yt-primary-rgb),.1)}.yt-result-wide{max-width:1200px;margin:40px auto 0;padding:0 clamp(12px,3vw,20px)}.yt-result-full{background:var(--yt-bg-card);padding:clamp(22px,4vw,38px);border-radius:var(--yt-radius);box-shadow:var(--yt-shadow);border:1px solid var(--yt-border);animation:ytFadeUp .4s cubic-bezier(.2,.8,.2,1)}.yt-idea-box{background:linear-gradient(135deg,var(--yt-soft),var(--yt-bg-card));padding:22px;border-radius:16px;margin-top:22px;border:1px solid rgba(var(--yt-primary-rgb),.1)}.yt-idea-box h4{margin:0 0 14px;font-size:clamp(14px,1.8vw,16px);font-weight:800;color:var(--yt-dark);display:flex;align-items:center;gap:10px}.yt-idea-box h4::before{content:"";display:block;width:4px;height:18px;background:linear-gradient(180deg,var(--yt-primary),var(--yt-primary-l));border-radius:2px;flex-shrink:0}.yt-idea-box ul{list-style:none;padding:0;margin:0}.yt-idea-box li{display:flex;gap:12px;margin-bottom:10px;font-size:clamp(13px,1.5vw,14px);line-height:1.6;padding:10px 14px;background:var(--yt-bg-card);border-radius:10px;border:1px solid rgba(var(--yt-primary-rgb),.08);transition:border-color var(--yt-transition),transform var(--yt-transition)}.yt-idea-box li:hover{border-color:rgba(var(--yt-primary-rgb),.25);transform:translateX(3px)}.idea-title{flex:1;word-break:break-word;color:var(--yt-dark)}.idea-score{font-weight:800;color:var(--yt-primary);white-space:nowrap;font-size:13px}.yt-trends{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:18px}.yt-trend-item{background:linear-gradient(135deg,var(--yt-soft),var(--yt-soft-2));padding:18px 14px;border-radius:14px;text-align:center;border:1px solid rgba(var(--yt-primary-rgb),.12);transition:transform var(--yt-transition),box-shadow var(--yt-transition)}.yt-trend-item:hover{transform:translateY(-4px);box-shadow:0 14px 35px rgba(var(--yt-primary-rgb),.15)}.yt-trend-item strong{display:block;font-size:clamp(13px,1.6vw,15px);font-weight:700;color:var(--yt-primary);margin-bottom:5px}.yt-trend-item span{font-size:12px;color:var(--yt-muted)}.yt-insight,.yt-info,.yt-confidence{margin-top:18px;font-size:clamp(13px,1.6vw,15px);line-height:1.75;padding:14px 18px;background:#f8fafc;border-radius:12px;border-left:4px solid var(--yt-primary);color:#334155}.yt-note,.yt-tip,.yt-path{margin-top:14px;font-size:14px;color:var(--yt-muted);line-height:1.7}.yt-status{font-size:18px;font-weight:800;color:var(--yt-primary);margin-top:14px;display:block}.yt-suggestions,.yt-tips{margin-top:22px;text-align:left}.yt-suggestions h4,.yt-tips h4{font-size:15px;font-weight:700;color:var(--yt-primary);margin-bottom:10px}.yt-suggestions ul,.yt-tips ul{padding-left:18px}.yt-suggestions li,.yt-tips li{font-size:14px;margin-bottom:7px;color:#334155}.yt-fixes{margin-top:22px;text-align:left}.yt-fixes h4{margin-bottom:10px;font-size:15px;font-weight:700;color:var(--yt-primary)}.yt-fixes ul{padding-left:18px;margin:0}.yt-fixes li{font-size:14px;margin-bottom:6px;color:#334155}.yt-stage{margin-top:20px;font-size:clamp(18px,2.8vw,22px);font-weight:800;color:var(--yt-primary);padding:14px 24px;background:linear-gradient(135deg,var(--yt-soft),var(--yt-soft-2));border-radius:14px;display:inline-block}.yt-sub-winner{text-align:center;margin-top:20px;font-weight:700;font-size:16px;color:var(--yt-primary)}.yt-compare-wrapper,.yt-sub-compare{max-width:1020px;margin:48px auto;display:grid;grid-template-columns:1fr auto 1fr;align-items:start;gap:24px}.yt-compare-card,.yt-sub-box{background:var(--yt-bg-card);border-radius:var(--yt-radius);padding:clamp(20px,4vw,30px);text-align:center;box-shadow:var(--yt-shadow);border:1px solid var(--yt-border);animation:ytFadeUp .4s cubic-bezier(.2,.8,.2,1)}.yt-compare-card img,.yt-sub-box img{width:80px;height:80px;border-radius:50%;margin-bottom:10px;border:2px solid rgba(var(--yt-primary-rgb),.15);object-fit:cover}.yt-compare-card ul{list-style:none;padding:0}.yt-compare-card li{margin-bottom:8px;font-size:14px;color:#334155}.yt-vs{width:64px;height:64px;border-radius:50%;background:linear-gradient(135deg,var(--yt-primary),var(--yt-primary-l));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:18px;box-shadow:0 12px 30px rgba(var(--yt-primary-rgb),.4);flex-shrink:0;position:sticky;top:50%}@media (max-width:768px){.yt-tool-form{flex-direction:column;max-width:100%!important}.yt-tool-form input,.yt-tool-form select{min-width:100%}.yt-tool-form button{width:100%;justify-content:center}.yt-compare-form{grid-template-columns:1fr!important}.yt-grid-form{grid-template-columns:1fr!important}.yt-compare-wrapper,.yt-sub-compare{grid-template-columns:1fr!important;gap:16px}.yt-vs{margin:4px auto;width:52px;height:52px;position:static}.yt-trends{grid-template-columns:1fr 1fr!important}.yt-result-wide{padding:0 10px}.yt-result-card,.yt-video-result{margin:24px auto;padding:22px 18px}.yt-video-stats,.yt-metrics{gap:10px}.yt-anim{font-size:clamp(36px,10vw,48px)}}@media (max-width:480px){.yt-trends{grid-template-columns:1fr!important}.yt-result-full{padding:18px 14px;border-radius:var(--yt-radius-sm)}.yt-idea-box li{flex-direction:column;gap:6px}.idea-score{align-self:flex-end}.yt-video-stats,.yt-growth-stats,.yt-metrics{grid-template-columns:1fr!important}.yt-skeleton-grid{grid-template-columns:1fr}}