:root{font-family:Pretendard,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}#root{width:100%}:root{--primary-color: #FF9800;--primary-hover: #F57C00;--secondary-color: #FFF3E0;--text-main: #333333;--text-muted: #666666;--bg-light: #FAFAFA;--white: #FFFFFF;--shadow-soft: 0 4px 12px rgba(0, 0, 0, .08);--shadow-deep: 0 8px 24px rgba(0, 0, 0, .12);--radius-lg: 16px;--radius-md: 12px}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Pretendard,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background-color:var(--bg-light);color:var(--text-main);line-height:1.6}.app-container{max-width:480px;margin:0 auto;min-height:100vh;display:flex;flex-direction:column;background-color:var(--white);box-shadow:0 0 40px #0000000d}.header{padding:1rem 1.5rem;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid #EEEEEE;position:sticky;top:0;background:#ffffffe6;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);z-index:100}.logo{display:flex;align-items:center;gap:8px;text-decoration:none;font-weight:800;font-size:1.25rem;color:var(--text-main)}.nav a{margin-left:1rem;text-decoration:none;font-weight:600;color:var(--text-muted);font-size:.9rem}.main-content{flex:1;padding:2rem 1.5rem}.landing-container{text-align:center}.hero-title{font-size:2.2rem;font-weight:900;line-height:1.2;margin-bottom:1rem}.highlight{color:var(--primary-color)}.hero-subtitle{color:var(--text-muted);margin-bottom:2.5rem;font-size:1.1rem}.cta-button{width:100%;padding:1.2rem;background-color:var(--primary-color);color:#fff;border:none;border-radius:var(--radius-lg);font-size:1.2rem;font-weight:700;cursor:pointer;box-shadow:0 4px 15px #ff98004d;transition:transform .2s}.cta-button:active{transform:scale(.98)}.features{margin-top:4rem;display:flex;flex-direction:column;gap:2rem}.feature-item{display:flex;flex-direction:column;align-items:center;gap:.5rem}.feature-icon{color:var(--primary-color);width:40px;height:40px;margin-bottom:.5rem}.page-title{font-size:1.75rem;font-weight:800;margin-bottom:2rem}.form-step{margin-bottom:2.5rem}.form-step h3{font-size:1.1rem;margin-bottom:1rem;color:var(--text-muted)}.button-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.button-grid button{padding:1rem;border:2px solid #EEEEEE;background:#fff;border-radius:var(--radius-md);font-size:1.1rem;font-weight:600;display:flex;align-items:center;justify-content:center;gap:8px;cursor:pointer}.button-grid button.active{border-color:var(--primary-color);background-color:var(--secondary-color);color:var(--primary-color)}.text-input{width:100%;padding:1.2rem;border:2px solid #EEEEEE;border-radius:var(--radius-md);font-size:1.1rem;outline:none}.text-input:focus{border-color:var(--primary-color)}.input-hint{font-size:.85rem;color:var(--text-muted);margin-top:.5rem}.submit-button{width:100%;padding:1.2rem;background-color:var(--text-main);color:#fff;border:none;border-radius:var(--radius-lg);font-size:1.2rem;font-weight:700;display:flex;align-items:center;justify-content:center;gap:8px;margin-top:1rem}.result-card{background:var(--white);border-radius:var(--radius-lg);padding:1.5rem;margin-bottom:1.5rem;border:1px solid #EEEEEE;box-shadow:var(--shadow-soft)}.card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}.platform-tag{font-size:.75rem;font-weight:700;padding:4px 10px;border-radius:20px}.instagram{background:#fdf2f8;color:#db2777}.blog{background:#f0fdf4;color:#16a34a}.copy-button{display:flex;align-items:center;gap:4px;border:none;background:var(--bg-light);padding:8px 12px;border-radius:8px;font-weight:600;font-size:.85rem;cursor:pointer}.copy-button.copied{background-color:var(--primary-color);color:#fff}.text-area{white-space:pre-wrap;font-size:1rem;color:var(--text-main)}.regenerate-button{width:100%;padding:1.2rem;background-color:var(--secondary-color);color:var(--primary-color);border:2px solid var(--primary-color);border-radius:var(--radius-lg);font-size:1.1rem;font-weight:800;display:flex;align-items:center;justify-content:center;gap:10px;cursor:pointer;margin-top:1.5rem;transition:all .2s ease}.regenerate-button:hover{background-color:var(--primary-color);color:#fff;box-shadow:0 4px 12px #ff980033}.regenerate-button:active{transform:scale(.98)}.loading-container{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:4rem 0;text-align:center}.loader{border:5px solid #f3f3f3;border-top:5px solid var(--primary-color);border-radius:50%;width:50px;height:50px;animation:spin 1s linear infinite;margin-bottom:1.5rem}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.footer{padding:2rem 1.5rem;text-align:center;color:var(--text-muted);font-size:.8rem;border-top:1px solid #EEEEEE}