:root{--primary: #111111;--primary-hover: #333333;--accent: #2563eb;--accent-light: #3b82f6;--bg: #fafafa;--bg-card: #ffffff;--bg-surface: #f4f4f5;--text: #18181b;--text-muted: #71717a;--text-light: #a1a1aa;--border: #e4e4e7;--border-focus: #2563eb;--radius: 12px;--radius-lg: 16px;--radius-xl: 24px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow: 0 1px 3px rgba(0, 0, 0, .1), 0 1px 2px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -4px rgba(0, 0, 0, .1);--font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;--transition: .15s ease}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{height:100%;-webkit-text-size-adjust:100%}body{min-height:100%;font-family:var(--font);font-size:16px;line-height:1.6;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#root{min-height:100vh;min-height:100dvh}img{max-width:100%;display:block}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.app{min-height:100vh;min-height:100dvh}.page{min-height:100vh;min-height:100dvh;display:flex;align-items:flex-start;justify-content:center;padding:2rem 1rem 3rem}.container{width:100%;max-width:480px;margin:0 auto}.hero{text-align:center;margin-bottom:2rem}.hero-title{font-size:1.75rem;font-weight:800;letter-spacing:-.02em;line-height:1.2;color:var(--text);margin-bottom:.5rem}.hero-subtitle{font-size:.95rem;color:var(--text-muted);max-width:320px;margin:0 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var(--border);flex:1}.btn-secondary:hover:not(:disabled){background:var(--border)}.btn-ghost{background:transparent;color:var(--text-muted);width:100%;font-weight:500}.btn-ghost:hover:not(:disabled){color:var(--text);background:var(--bg-surface)}.spinner{width:32px;height:32px;border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .7s linear infinite;margin:0 auto}.spin{animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.preview-image-wrapper{position:relative;display:flex;align-items:center;justify-content:center;min-height:280px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:1rem;margin-bottom:1.5rem;overflow:hidden}.preview-image{max-width:100%;max-height:400px;border-radius:var(--radius);transition:opacity .3s 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