:root{--primary: #2563eb;--primary-hover: #1d4ed8;--bg-color: #f8fafc;--text-main: #111827;--text-muted: #4b5563;--card-bg: #ffffff;--card-shadow: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--border-color: #e2e8f0}*{margin:0;padding:0;box-sizing:border-box;font-family:Inter,system-ui,-apple-system,sans-serif}body{background:var(--bg-color);color:var(--text-main);min-height:100vh;display:flex;flex-direction:column;align-items:center;overflow-x:hidden}#root{width:100%;display:flex;flex-direction:column;align-items:center}header{width:100%;padding:2.5rem;text-align:center;background:var(--card-bg);border-bottom:1px solid var(--border-color);box-shadow:0 1px 3px #0000001a;position:relative}h1{font-size:2.5rem;font-weight:800;color:var(--text-main);background:linear-gradient(135deg,#1e40af,#2563eb);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:.5rem;letter-spacing:-.025em}header p,.subtitle{color:var(--text-muted);font-weight:500;font-size:1.1rem;max-width:800px;margin:.5rem auto 0}.subtitle{font-size:1.25rem;line-height:1.4}.container{max-width:1000px;width:90%;padding:3rem 0;display:flex;flex-direction:column;gap:2.5rem}.hero{text-align:center;max-width:700px;margin:0 auto}.hero p{color:var(--text-muted);font-size:1.1rem;line-height:1.6}.upload-card{background:var(--card-bg);padding:3rem;border-radius:24px;border:1px solid var(--border-color);box-shadow:var(--card-shadow);display:flex;flex-direction:column;align-items:center;gap:2rem;transition:all .3s cubic-bezier(.4,0,.2,1)}.upload-card:hover{transform:translateY(-4px);box-shadow:0 20px 25px -5px #0000001a,0 8px 10px -6px #0000001a}.dropzone{width:100%;border:2px dashed #cbd5e1;border-radius:20px;padding:4rem 2rem;display:flex;flex-direction:column;align-items:center;cursor:pointer;transition:all .2s ease;background:#f8fafc}.dropzone:hover{border-color:var(--primary);background:#eff6ff}.dropzone svg{stroke:var(--primary);margin-bottom:1.5rem;transition:transform .2s ease}.dropzone:hover svg{transform:translateY(-5px)}.dropzone p{font-weight:600;color:var(--text-main)}button{background:var(--primary);color:#fff;border:none;padding:.875rem 2rem;border-radius:12px;font-weight:600;font-size:1rem;cursor:pointer;transition:all .2s cubic-bezier(.4,0,.2,1);box-shadow:0 4px 6px -1px #2563eb33}button.btn-secondary{background:var(--card-bg);color:var(--text-main);border:1px solid var(--border-color);box-shadow:0 1px 2px #0000000d}button.btn-secondary:hover{background:#f1f5f9;border-color:#cbd5e1;box-shadow:0 4px 6px -1px #0000001a;transform:translateY(-1px)}button:hover{background:var(--primary-hover);transform:translateY(-1px);box-shadow:0 10px 15px -3px #2563eb4d}button:active{transform:translateY(0)}button:disabled{background:#94a3b8;cursor:not-allowed;box-shadow:none}.preview-area{display:none;grid-template-columns:1fr 1fr;gap:2rem;width:100%}.preview-box{background:#f1f5f9;border-radius:20px;padding:1.5rem;text-align:center;border:1px solid var(--border-color)}.preview-box span{font-weight:700;font-size:.875rem;text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted)}.preview-box img{max-width:100%;border-radius:12px;margin-top:1.25rem;box-shadow:0 4px 12px #0000000d;background:#fff}.loader{display:none;border:4px solid #e2e8f0;border-top:4px solid var(--primary);border-radius:50%;width:48px;height:48px;animation:spin 1s cubic-bezier(.5,0,.5,1) infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}footer{margin-top:auto;padding:3rem;text-align:center;color:var(--text-muted);font-size:.875rem;border-top:1px solid var(--border-color);width:100%;background:#fff;display:flex;flex-direction:column;gap:1.5rem;align-items:center}.footer-links{display:flex;gap:2rem;flex-wrap:wrap;justify-content:center}.footer-links a{color:var(--text-muted);text-decoration:none;font-weight:500;transition:color .2s ease}.footer-links a:hover{color:var(--primary)}.seo-content{margin-top:2rem;padding:3rem;background:var(--card-bg);border-radius:24px;border:1px solid var(--border-color);box-shadow:var(--card-shadow);color:var(--text-main);line-height:1.8}.seo-content h2{font-size:1.75rem;margin-bottom:1.5rem;color:var(--text-main)}.seo-content h3{font-size:1.5rem;margin:2rem 0 1rem;color:var(--text-main)}.seo-content p{margin-bottom:1.5rem;color:var(--text-muted)}.seo-content ul{list-style:none;display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;margin-top:1.5rem}.seo-content li{padding-left:1.5rem;position:relative;color:var(--text-muted);font-weight:500}.seo-content li:before{content:"✓";position:absolute;left:0;color:var(--primary);font-weight:800}@media (max-width: 768px){.preview-area{grid-template-columns:1fr}.seo-content{padding:2rem}}