*{margin:0;padding:0;box-sizing:border-box}body{font-family:Aeonik,Source Han Sans JP,Arial,Helvetica,sans-serif;background:#f5f5f5;color:#333}.login-container{display:flex;justify-content:center;align-items:center;min-height:100vh}.login-card{background:#fff;border-radius:8px;box-shadow:0 2px 8px #0000001a;padding:48px 40px;max-width:400px;width:100%;text-align:center}.login-logo{margin-bottom:16px}.login-card h1{font-size:24px;font-weight:600;margin-bottom:8px}.login-subtitle{color:#888;font-size:14px;margin-bottom:32px}.login-button{display:block;width:100%;padding:10px 16px;background:#34cdd7;color:#fff;text-decoration:none;border-radius:6px;font-size:16px;font-weight:500;transition:background .2s}.login-button:hover{background:#2bb8c2}.login-button--disabled{background:#d9d9d9;color:#888;cursor:not-allowed;pointer-events:none}.login-error{color:#c0392b;margin-bottom:0}