:root{--primary: #60A9B0;--primary-hover: #4e8c92;--bg-color: #f5fdfd;--text-color: #333;--card-bg: #ffffff;--error: #e74c3c;--success: #2ecc71;font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light;background-color:var(--bg-color);color:var(--text-color);font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box;margin:0;padding:0}body{display:flex;justify-content:center;align-items:center;min-height:100vh;margin:0;background-color:var(--bg-color)}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:var(--primary);color:#fff;cursor:pointer;transition:border-color .25s,background-color .25s}button:hover{background-color:var(--primary-hover)}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}input{width:100%;padding:12px;margin:8px 0;border:1px solid #ccc;border-radius:8px;font-size:1em}input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px #60a9b033}.container{background:var(--card-bg);padding:2.5rem;border-radius:20px;box-shadow:0 10px 30px #00000014;width:90%;max-width:480px;margin:0 auto;text-align:center}@media(max-width:480px){.container{padding:1.5rem;width:95%;box-shadow:none;background:transparent}input{padding:14px;font-size:16px}button{padding:14px;font-size:1.1rem;width:100%}h1{font-size:1.8rem}}h1{color:var(--primary);margin-bottom:.5rem}.subtitle{color:#666;margin-bottom:2rem}.input-group{margin-bottom:1.5rem;text-align:left}.label{font-size:.9em;font-weight:600;color:#555;margin-bottom:4px;display:block}.result-card{margin-top:2rem;padding:1rem;background:#eef9fa;border-radius:8px;border:1px dashed var(--primary);display:flex;justify-content:space-between;align-items:center;gap:10px}.shortlink-text{font-weight:700;color:var(--primary);word-break:break-all}.copy-btn{background:transparent;color:var(--primary);border:1px solid var(--primary);padding:.4em .8em;font-size:.9em}.copy-btn:hover{background:#60a9b01a}