:root{--apple-bg: #fbfbfd;--apple-white: #ffffff;--apple-blue: #0071e3;--apple-text: #1d1d1f;--apple-text-secondary: #86868b;--apple-border: rgba(0, 0, 0, .1);--apple-shadow: 0 4px 24px rgba(0, 0, 0, .05)}html,body{background-color:var(--apple-bg);min-height:100vh}body,#root{margin:0;padding:0;background-color:var(--apple-bg);font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,SF Pro Display,Helvetica Neue,sans-serif;color:var(--apple-text);line-height:1.5;min-height:100vh}.app-container{max-width:650px;margin:0 auto;padding:40px 20px;background-color:var(--apple-bg);min-height:60vh}.w-full{border:1px solid transparent;background-color:var(--apple-white);border-radius:18px}.header{text-align:center;margin-bottom:40px}.header h1{font-size:40px;font-weight:600;letter-spacing:-.5px;margin:0 0 8px;color:var(--apple-text)}.header p{font-size:18px;color:var(--apple-text-secondary);margin:0}.card{background-color:var(--apple-white);border-radius:18px;padding:24px;margin-bottom:24px;box-shadow:var(--apple-shadow);border:1px solid var(--apple-border)}.input-container{margin-bottom:24px}.tweet-input{width:100%;min-height:120px;padding:16px;border-radius:12px;border:1px solid var(--apple-border);font-size:16px;font-family:inherit;resize:vertical;transition:all .2s ease}.tweet-input:focus{outline:none;border-color:var(--apple-blue);box-shadow:0 0 0 3px #0071e31a}.character-count{text-align:right;font-size:14px;color:var(--apple-text-secondary);margin-top:8px}.button{background-color:var(--apple-blue);color:#fff;border:none;border-radius:980px;padding:12px 24px;font-size:16px;font-weight:500;cursor:pointer;transition:all .2s 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var(--apple-border);border-top-color:var(--apple-blue);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.tone-selector{margin:24px 0}.tone-selector h3{font-size:16px;font-weight:500;color:var(--apple-text);margin:0 0 12px}.tone-buttons{display:flex;gap:12px;margin:20px 0}.tone-button{padding:8px 16px;border:1px solid #ccc;border-radius:4px;background:#fff;cursor:pointer;transition:all .2s ease}.tone-button:hover{background:#f5f5f5}.tone-button.active{background:#007bff;color:#fff;border-color:#007bff}.google-signin-button{display:flex;align-items:center;justify-content:center;gap:10px;background-color:#fff;color:var(--apple-text-secondary, #86868b);border:1px solid var(--apple-border, rgba(0, 0, 0, .1));border-radius:980px;padding:12px 20px;font-size:15px;font-weight:500;cursor:pointer;transition:all .2s ease;font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,SF Pro Display,Helvetica 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#0071e3);font-weight:600}.disclaimer{font-size:13px;color:var(--apple-text-secondary, #86868b);margin-top:16px}.loading{display:flex;align-items:center;justify-content:center;gap:8px;color:var(--apple-text-secondary, #86868b)}.loading-spinner{width:16px;height:16px;border:2px solid var(--apple-border, rgba(0, 0, 0, .1));border-top-color:var(--apple-blue, #0071e3);border-radius:50%;animation:spin 1s linear infinite}@keyframes 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